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Worksheets24-25 8th Grade Science Super Quiz
Total questions: 291
Worksheet time: 6hrs 10mins
What does Newton's First Law of Motion state about a body at rest?
It will start moving on its own.
It will remain at rest unless acted upon by an unbalanced force.
It will change direction.
It will increase in speed.
What is inertia?
The tendency of an object to change its motion.
The tendency of an object to remain stationary or in motion.
The force required to stop an object.
The speed at which an object moves.
How can the mass of an object affect its inertia?
Smaller mass means more inertia.
Larger mass means less inertia.
Larger mass means more inertia.
Mass does not affect inertia.
What role does friction play in stopping a moving object?
It increases the object's speed.
It has no effect on the object's motion.
It helps bring the object to a stop.
It makes the object move in a circle.
What happens when you rapidly lift your hand and let go of a tennis ball in your palm?
The ball will stay in your hand
The ball will fly upward
The ball will fall to the ground
The ball will move sideways
What is an example of an unbalanced force?
Holding a tennis ball
Throwing a ball upward
Placing a ball on a table
Rolling a ball on the ground
What can unbalanced forces do to objects already in motion?
Stop them completely
Redirect or deflect them
Make them disappear
Slow them down
What is the net force on an object when balanced forces are acting on it?
Greater than zero
Less than zero
Zero
Equal to the gravitational force
What does the term "magnitude" refer to in science?
The color of an object
The size or importance of something
The speed of an object
The temperature of an object
What force pulls objects toward the center of the Earth?
Friction
Magnetism
Gravity
Air resistance
What must be true if a ball is not moving on a table?
It has no forces acting on it
It is only affected by gravity
There is another force balancing gravity's steady pull
It is in a vacuum
What happens to a soccer ball when a player kicks it into the goal?
It remains still due to balanced forces
It moves due to unbalanced forces
It moves due to balanced forces
It remains still due to unbalanced forces
What is matter?
Anything that has mass and takes up space
Only solid objects
Only liquids and gases
Only living things
What is the purest form of matter?
Compound
Mixture
Element
Solution
How can compounds be separated?
By physical means
By breaking chemical bonds
By freezing
By heating
What is a mixture made up of?
Only elements
Only compounds
Different substances such as elements, compounds, or both
Only homogeneous substances
How can mixtures always be separated?
By chemical reactions
Using physical properties like magnetism, color, size, and density
By heating them
By freezing them
What is a characteristic of a homogeneous mixture?
It has a definite composition
It is uniform in appearance
It is easy to separate
It contains only one type of element
What is an example of a heterogeneous mixture?
Cake batter
Salt
Salad of greens, tomatoes, and cucumbers
Silver
What is a water molecule made of?
One oxygen atom and two hydrogen atoms
Two oxygen atoms and one hydrogen atom
One hydrogen atom and two oxygen atoms
Three hydrogen atoms
What type of mixture is created when Cecilia mixes red and white paint thoroughly?
Homogeneous mixture
Heterogeneous mixture
Colloidal mixture
Suspended mixture
What type of mixture is created when Cecilia mixes red and white paint but they remain separate?
Homogeneous mixture
Heterogeneous mixture
Colloidal mixture
Suspended mixture
What does the law of conservation of mass state about matter during a chemical reaction?
Matter is created and destroyed.
Matter changes form but is not created or destroyed.
Matter disappears completely.
Matter is only created.
What happens during a chemical reaction?
Substances remain unchanged.
Substances are converted to different substances.
Substances disappear.
Substances are created from nothing.
How are chemical elements represented in the periodic table?
By numbers only.
By colors.
By symbols, which are capital letters or a combination of capital and lowercase letters.
By shapes.
What does a chemical equation use to describe what happens in a chemical reaction?
Colors and shapes
Chemical symbols and numbers
Sounds and lights
Text and images
What are the substances on the left side of a chemical equation called?
Products
Catalysts
Reactants
Inhibitors
In a chemical equation, what does the arrow between the left and right sides represent?
Equals
Yields
Subtracts
Divides
What is the product formed when iron (Fe) reacts with oxygen (O₂) in the given chemical equation?
Fe
Fe₂O₃
4Fe
3O₂
What does the Law of Conservation of Mass state?
Matter can be created or destroyed during chemical reactions.
Matter cannot be created or destroyed during chemical reactions.
Matter can only be created during chemical reactions.
Matter can only be destroyed during chemical reactions.
How can you verify the conservation of mass in a chemical reaction?
By changing the mass of the reactants.
By comparing the mass of the reactants and products.
By increasing the number of atoms in the products.
By decreasing the number of atoms in the reactants.
In the reaction of iron and oxygen to form iron oxide, how many oxygen atoms are in the reactants?
2
4
6
8
What is the main product of photosynthesis that provides energy for many food chains?
Oxygen
Carbon dioxide
Glucose
Water
Which of the following is a reactant in the photosynthesis equation?
Carbon dioxide
Water
Oxygen
Energy
According to the law of conservation of mass, what is true about the mass of reactants and products in photosynthesis?
The mass of reactants is greater than the mass of products.
The mass of reactants is less than the mass of products.
The mass of reactants is equal to the mass of products.
The mass of reactants is unrelated to the mass of products.
Which chemical reaction is represented by the equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂?
Photosynthesis
Respiration
Combustion
Fermentation
In the photosynthesis equation, which elements are involved?
Carbon, Oxygen, Hydrogen
Nitrogen, Oxygen, Hydrogen
Carbon, Nitrogen, Sulfur
Oxygen, Sulfur, Phosphorus
What is the main product of the photosynthesis reaction?
Glucose
Water
Carbon Dioxide
Oxygen
How many molecules of oxygen (O₂) are produced in the photosynthesis equation?
6
3
12
2
What is acceleration in scientific terms?
The rate at which velocity changes
The distance covered over time
The mass of an object
The force applied to an object
Which of the following is an example of acceleration?
A car moving at a constant speed
A bird hovering in place
A car slowing down at a red light
A person standing still
How is acceleration often measured?
Meters per second (m/s)
Meters per second squared (m/s2)
Kilometers per hour (km/h)
Miles per hour (mi/h)
Which of these are formulas for calculating acceleration?
a = (v2 - v1 )/ (t2 - t1)
a = d / t
a = Δν/Δt
a = F / m
What does the graph showing velocity versus time illustrate?
The acceleration of an object
The displacement of an object
The speed of an object
The force acting on an object
What does Newton's Second Law state about an object's acceleration?
It is inversely proportional to the net force.
It is directly proportional to the object's mass.
It is directly proportional to the net force.
It is inversely proportional to the object's velocity.
According to Newton's Second Law, how can the equation for acceleration be expressed?
a = m/F
a = F/m
a = F*m
a = m*F
If the mass of an object doubles, what happens to its acceleration according to Newton's Second Law?
The acceleration doubles.
The acceleration is halved.
The acceleration remains the same.
The acceleration triples.
What is the formula used to calculate acceleration when the net force and mass of an object are known?
a) mF
b) $ a = F \times m $
c) a=Fm
d) $ a = F + m $
In the context of bobsled racing, what happens when the acceleration at the start is greater?
a) The bobsled team is more likely to win.
b) The bobsled team is more likely to lose.
c) The bobsled will slow down.
d) The bobsled will not move.
Using Newton's second law, calculate the acceleration of Brooklyn's skateboard if it has a mass of 4 kg and he applies a force of 120 N.
30 m/s²
20 m/s²
15 m/s²
10 m/s²
Using Newton's second law, calculate the acceleration of Liam's skateboard if it has a mass of 5 kg and he applies a force of 100 N.
25 m/s²
20 m/s²
15 m/s²
10 m/s²
What is the formula for Newton's second law of motion?
F = ma
F = mv
F = m/a
F = m+v
Calculate the missing force if the mass is 8 kg and the acceleration is 1.5 m/s².
12 N
10 N
8 N
6 N
What does Newton's First Law of Motion state?
A body at rest will remain at rest, and a body in uniform motion will remain in uniform motion, unless acted upon by an external force.
The force acting upon an object is equal to the mass of the object times its acceleration.
For every action there is an equal and opposite reaction.
A body in motion will always accelerate.
According to Newton's Second Law of Motion, what is the relationship between force, mass, and acceleration?
Force is equal to the mass of the object times its acceleration.
Force is equal to the mass of the object divided by its acceleration.
Force is equal to the acceleration of the object divided by its mass.
Force is equal to the mass of the object plus its acceleration.
What does Newton's Third Law of Motion state?
A body at rest will remain at rest, and a body in uniform motion will remain in uniform motion, unless acted upon by an external force.
The force acting upon an object is equal to the mass of the object times its acceleration.
For every action there is an equal and opposite reaction.
A body in motion will always accelerate.
What does Newton's first law state about motion in the context of bumper cars?
Motion is determined by the force from the collision and its own mass.
The orange car will remain still until the blue car hits it.
The driver pushes forward on the seat belt.
The car experiences the same force during a collision as the other car.
According to Newton's second law, what determines the sideways acceleration of a bumper car?
The driver's inertia.
The force from the collision and its own mass.
The backward force from the seat belt.
The uniform motion of the car.
What does Newton's third law explain about the forces experienced by a driver in a bumper car?
The driver's body continues in the same direction due to inertia.
The car changes course due to the collision.
The driver pushes forward on the seat belt, which exerts a backward force.
The car is in uniform motion with no forces acting on it.
What does the word "demonstrate" mean?
To show or give a clear explanation of how something is done
To hide information
To confuse the audience
To ignore evidence
What must a rocket overcome to launch away from Earth?
Air pressure
Gravity
Wind resistance
Solar radiation
What is the role of thrust in rocket propulsion?
To slow down the rocket using the first law
To push the rocket using the Third Law
To change the rocket's direction using the second law
To cool down the rocket using the first law
How does designing a rocket to be aerodynamic help it?
It increases the rocket's weight
It helps overcome friction from air drag
It makes the rocket more colorful
It reduces the rocket's speed
According to Newton's First Law, what happens when the rocket first ignites?
It immediately accelerates
It takes a few seconds to overcome inertia
It explodes
It changes direction
Which of Newton's laws BEST explains the interaction between the bat and the ball in the photograph?
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Newton's Law of Universal Gravitation
What should you assume about the ball's motion before it is hit by the bat?
The ball is at rest.
The ball is in uniform motion.
The ball is accelerating.
The ball is moving in a circle.
In the scenario where three people are trying to slide a heavy box, which of Newton's laws would explain the need for force to start the motion?
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Newton's Law of Universal Gravitation
What is the estimated number of stars in the universe according to astronomers?
1 million
1 billion
1 trillion
1 septillion
What elements do stars produce that are essential for life?
Helium and neon
Carbon and oxygen
Gold and silver
Sodium and chlorine
What is the primary composition of our sun?
Iron and nickel
Hydrogen gas
Carbon dioxide
Methane
What is a typical star primarily made of?
Hydrogen and helium
Oxygen and nitrogen
Carbon and iron
Silicon and magnesium
What process do stars use to produce energy?
Nuclear fusion
Chemical reaction
Photosynthesis
Combustion
Which color stars are the hottest?
Blue stars
Red stars
Yellow stars
White stars
What is the unit used to describe the distance to stars other than the Sun?
Light-year
Light cycles
Years
Aldrins
What happens to a sun-like star when it begins to run out of fuel?
It becomes a red giant
It becomes a black hole
It becomes a neutron star
It becomes a supernova
What does the H-R diagram represent?
The relationship between a star's mass and its age
The relationship between a star's temperature and its luminosity
The relationship between a star's distance and its brightness
The relationship between a star's size and its color
In the H-R diagram, what does each point plotted represent?
A different galaxy
A different planet
A different star
A different constellation
How does luminosity change as you move up the H-R diagram along the y-axis?
Luminosity decreases
Luminosity remains constant
Luminosity increases
Luminosity fluctuates randomly
What scale is used to measure the temperatures of stars on the H-R diagram?
Celsius
Fahrenheit
Kelvin
Rankine
What does an H-R diagram display about stars?
Luminosity and temperature
Distance from Earth
Age and composition
Orbital speed
Where do hot bluish stars appear on the H-R diagram?
Upper left
Lower right
Center
Bottom left
What percentage of stars are main-sequence stars?
50%
70%
90%
100%
What is a characteristic of white dwarfs on the H-R diagram?
Very luminous and massive
Hot but not very luminous
Cool and very luminous
Cold and massive
What are the primary categories of stars on the H-R diagram?
Main sequence, giants, supergiants, and white dwarfs
Main sequence, red dwarfs, blue giants, and neutron stars
Main sequence, black holes, red giants, and pulsars
Main sequence, brown dwarfs, red supergiants, and quasars
What is the approximate surface temperature of Betelgeuse, a supergiant that is colored a deep dark red?
3,500 K
5,800 K
10,000 K
2,000 K
What is the luminosity of Betelgeuse on the H-R diagram?
More than 10,000
Less than 1,000
Exactly 5,000
Around 2,500
What type of diagram is used to compare the characteristics of Betelgeuse to those of our sun?
H-R diagram
Venn diagram
Pie chart
Bar graph
What is our solar system made up of?
A single star and objects bound by gravity
Multiple stars and no planets
Only dust and gas
Just one planet
How many stars does the Milky Way galaxy contain?
200-400 billion stars
1-2 million stars
500-700 billion stars
100-200 million stars
If the Sun is the size of a marble, how big would the Milky Way Galaxy be?
The Milky Way is the size of Texas
The Milky Way is the size of a basketball
The Milky Way is the size of a football field
The Milky Way is the size of a city
What is the name of the closest major galaxy to ours?
Canis Major Dwarf Galaxy
Andromeda Galaxy
Triangulum Galaxy
Sombrero Galaxy
What type of galaxy is the Milky Way?
Elliptical galaxy
Irregular galaxy
Barred spiral galaxy
Lenticular galaxy
How far is our solar system from the center of the Milky Way galaxy?
10,000 light-years
26,000 light-years
50,000 light-years
100,000 light-years
Which arm of the Milky Way is our solar system located in?
Earth is located in the Orion Arm.
Earth is located in the Sagittarius Arm.
Earth is located in the Perseus Arm.
Earth is located in the Centaurus Arm.
What is the relationship between gas and dust and the ability to produce stars in galaxies?
Gas and dust prevent star formation.
Gas and dust are unrelated to star formation.
Gas and dust are essential for star formation.
Gas and dust slow down star formation.
Why is Barrow, Alaska colder than El Paso, Texas during the summer despite having more daylight?
Barrow is closer to the equator.
Barrow receives less solar energy due to its latitude.
El Paso is at a higher altitude.
El Paso has more daylight hours.
What is the primary source of energy that warms Earth's atmosphere and surface?
Wind energy
Solar energy
Geothermal energy
Tidal energy
How does the curvature of Earth's surface affect the distribution of solar energy?
It causes even heating across the surface.
It causes uneven heating, with more energy at the equator.
It causes more energy to be absorbed at the poles.
It has no effect on solar energy distribution.
What is the primary way energy from the sun warms the Earth and influences the atmosphere?
Through conduction
Through convection
Through reflection
Through absorption
What happens to air when it is warmed by the sun?
It becomes denser and sinks
It expands and becomes less dense
It contracts and becomes more dense
It remains unchanged
What role does Earth's surface play in the warming of the atmosphere?
It reflects solar energy back into space
It absorbs solar energy and warms the air above it
It cools the air by absorbing heat
It blocks solar energy from reaching the atmosphere
What happens to cool air in the atmosphere?
It expands and rises
It shrinks and becomes more dense
It becomes less dense and rises
It remains at the same level
What role does energy from the hydrosphere play in Earth's weather and climate?
It causes the Earth's rotation to slow down.
It drives the water cycle and influences weather patterns.
It prevents the formation of clouds.
It stops ocean currents from moving.
What is the primary source of energy that causes water to circulate in the ocean?
Wind energy
Solar energy
Geothermal energy
Tidal energy
How do ocean currents affect the climate?
They have no effect on the climate.
They only affect the climate near the equator.
They circulate warm and cool water, influencing air temperature and climate.
They cause the ocean to freeze.
What is the Gulf Stream known for?
Carrying cold water from the poles to the equator.
Carrying warm water around the planet.
Being the largest ocean current.
Stopping the movement of air in the atmosphere.
What is climate?
The average year-after-year conditions of temperature and precipitation
The daily weather conditions
The amount of solar energy received by Earth
The interaction between the sun and Earth's atmosphere
How do ocean currents affect coastal areas?
They make coastal areas warmer than inland areas
They moderate the temperatures of coastal areas
They cause coastal areas to have extreme temperatures
They have no effect on coastal temperatures
How does energy from the sun influence weather and climate?
It causes patterns of circulation in the atmosphere and hydrosphere.
It has no effect on weather and climate.
It only affects the temperature of the ocean.
It only influences the weather at night.
What is atmospheric pressure?
The weight of the atmosphere pressing down on Earth
The temperature of the air
The speed of the wind
The humidity level in the air
What instrument is used to measure atmospheric pressure?
Thermometer
Barometer
Anemometer
Hygrometer
What happens to air pressure in a convection current when less-dense air rises?
It increases
It decreases
It remains the same
It fluctuates randomly
What do meteorologists use to show atmospheric pressure in different locations?
Thermometers
Isobars
Satellites
Rain gauges
What causes the whooshing noise when you open a jar for the first time?
The jar is empty.
Air pressure inside the jar is higher than outside.
Air pressure inside the jar is lower than outside.
The jar is too cold.
What is the movement of air across Earth's surface called?
Rain
Wind
Storm
Fog
What happens to air when it is over surfaces with different temperatures?
It remains still.
It forms convection currents.
It disappears.
It becomes solid.
What causes high air pressure near the surface?
Warm air rising
Cold air sinking
Hot air expanding
Air moving sideways
What does wind have to do with convection currents?
Air moves from low pressure to high pressure areas caused by convection.
Air moves from high pressure to low pressure areas caused by convection.
Convection currents are not related to wind.
What causes wind to occur on a global scale?
Uneven heating of Earth by solar energy
Constant temperature across the Earth
Equal air pressure everywhere
Lack of Earth's rotation
What is the Coriolis effect?
The influence of Earth's rotation on global winds
The warming of air at the equator
The cooling of air at the poles
The movement of air from high to low pressure
What are wind belts?
Groups of winds that occur between certain latitudes
Areas of high pressure
Calm areas at the equator
Fast-moving narrow bands of wind
What are jet streams?
Fast-moving, narrow bands of wind in the upper atmosphere
Calm areas at the equator
Groups of winds between latitudes
Areas of low pressure
How can you use two balloons and a scale to demonstrate that air has mass and exerts air pressure?
By filling one balloon with water and comparing weights
By inflating both balloons and comparing their weights
By deflating both balloons and comparing their weights
By using one balloon and a fan to create wind
What is the result of the unequal heating of Earth's atmosphere?
Formation of mountains
Creation of global winds
Increase in ocean salinity
Decrease in Earth's gravity
What is an air mass?
A body of air with varying temperature and humidity
A body of air with the same temperature, humidity, and air pressure
A cloud formation in the atmosphere
A type of precipitation
What type of weather is associated with low-pressure air masses?
Clear and dry weather
Rainy and wet weather
Hot and dry weather
Cold and dry weather
Where do continental polar air masses form?
Over warm ocean waters
Over cold land
Over hot land
Over cold ocean waters
What effect do jet streams have on air masses?
They create new air masses
They affect the movement of air masses
They increase the temperature of air masses
They decrease the humidity of air masses
What is a weather front?
A boundary where two air masses meet
A type of cloud formation
A seasonal wind pattern
A type of precipitation
Which type of front is associated with abrupt weather changes, including thunderstorms?
Warm Front
Cold Front
Stationary Front
Occluded Front
What happens when a warm air mass moves into a cool air mass?
The warm air mass sinks below the cool air mass
The warm air mass rises above the cool air mass
The cool air mass evaporates
The warm air mass becomes stationary
Which type of front can lead to long periods of rain, snow, fog, or clouds?
Cold Front
Warm Front
Stationary Front
Occluded Front
What occurs when a warm air mass is caught between two cold air masses?
Cold Front
Warm Front
Stationary Front
Occluded Front
What do meteorologists use to make weather maps?
Weather symbols
Temperature scales
Rain gauges
Barometers
What does the word "indicate" mean in the context of weather maps?
To hide
To point out or show
To erase
To confuse
What do front symbols on a weather map indicate?
Types of weather fronts
Types of clouds
Types of precipitation
Types of wind patterns
What is the purpose of weather symbols on a map?
To decorate the map
To represent different weather conditions
To show population density
To indicate time zones
As a meteorologist, why is it important to gather weather data from multiple locations rather than just one?
To get a broader understanding of weather patterns
To save time and resources
To focus only on local weather
To avoid data overload
What does a stationary front involve?
A warm air mass overtaking a cold air mass
A cold air mass and a warm air mass meeting without moving
Two cold air masses meeting
A warm air mass caught between two cold air masses
What is an occluded front?
A warm air mass overtaking a cold air mass
A cold air mass and a warm air mass meeting without moving
A warm air mass caught between two cold air masses
Two warm air masses meeting
What is a tropical cyclone?
A type of storm that develops over warm ocean water
A type of storm that develops over cold ocean water
A type of storm that develops over deserts
A type of storm that develops over mountains
What can high winds from tropical cyclones damage?
Houses, trees, and cars
Rivers and lakes
Deserts and mountains
Beaches and sand dunes
What can waters do during a storm surge?
Rise as much as 30 feet along the coast
Freeze and create icebergs
Evaporate completely
Turn into snow
What is one effect of storm bands traveling inland?
Causing heavy rains and flooding
Creating deserts
Lowering temperatures significantly
Increasing snowfall
What is a tropical cyclone?
A storm system with a high-pressure center and weak winds.
A storm system with a low-pressure center and strong winds.
A storm system with a low-pressure center and weak winds.
A storm system with a high-pressure center and strong winds.
At what minimum water temperature do tropical cyclones typically form?
20°C (68°F)
25°C (77°F)
27°C (80°F)
30°C (86°F)
What role does warm water play in the formation of tropical cyclones?
It cools the air mass above it.
It weakens the cyclone.
It heats the air mass above it, causing it to rise.
It absorbs cold air from above.
When is a storm officially categorized as a tropical cyclone?
When winds exceed 80 km/h. (50 mph)
When winds exceed 100 km/h (62 mph).
When winds exceed 120 km/h (74 mph)
When winds exceed 140 km/h (87 mph)
What is this diagram showing?
Formation of a thunderstorm
Development of a tornado
Stages of a hurricane
Phases of a monsoon
What is a tropical cyclone called when it forms in the Atlantic Ocean or the northeast Pacific Ocean?
Typhoon
Hurricane
Cyclone
Tornado
Where do typhoons typically make landfall?
Americas
East Asia
Australia
Europe
In which oceans are tropical cyclones called "cyclones"?
Atlantic and Northeast Pacific
South Pacific and Indian
Northwest Pacific
Arctic and Southern
What does the map in the image show?
The path of the 1900 Galveston hurricane
The path of a tornado in Texas
The path of a recent earthquake
The path of a wildfire in Texas
What is the significance of the numbers on the map?
They indicate the category of the storm
They show the speed of the hurricane
They represent the number of days the storm lasted
They indicate the temperature during the storm
What happened to the Galveston hurricane after making landfall?
It weakened
It grew stronger
It changed direction
It disappeared
What happens when two forces acting on an object are equal in strength and opposite in direction?
The object will change direction.
The object will remain still and stable.
The object will start moving.
The object will increase in speed.
What is the result when two forces acting on an object are not equal in strength or opposite in direction?
The forces are balanced.
The object will remain motionless.
The forces are unbalanced.
The object will decrease in speed.
In a tug of war, what happens when both sides exert the same force in opposite directions?
The rope moves to the left.
The rope moves to the right.
The rope does not move.
The rope breaks.
What is the net force on an object if two forces of 12 N each act in opposite directions?
24 N
12 N
0 N
6 N
If two forces act in the same direction, how is the net force determined?
By subtracting the smaller force from the larger force
By adding the two forces together
By multiplying the two forces
By dividing the larger force by the smaller force
What does a nonzero net force indicate about an object's motion?
The forces are balanced
The object's motion is constant
The forces are unbalanced
The object is at rest
In the scenario where a 5 N force acts upward and a 5 N force acts downward, what is the net force?
10 N
5 N
0 N
1 N
What does Newton's Third Law of Motion state?
An object in motion stays in motion.
For every action, there is an equal and opposite reaction.
Force equals mass times acceleration.
Objects at rest stay at rest.
What are the forces described by Newton's Third Law known as?
Gravitational forces
Magnetic forces
Force pairs
Frictional forces
What happens when you lean against a wall?
The wall exerts no force back.
The wall exerts a force in the same direction.
The wall exerts an equal force in the opposite direction.
The wall exerts a force downward.
Kyrie is pulling a rolling suitcase by its handle with a force of 38 N to the right. The suitcase exerts a force of 24 N to the left. What is the net force acting on the suitcase?
14 N to the right
62 N to the right
14 N to the left
62 N to the left
According to Newton's third law of motion, what happens when car A collides with car B at a bumper car ride?
Both cars stop moving.
Both cars move in the same direction.
Both cars bounce back from each other.
Only car A moves backward.
What is the main element that both diamonds and pencil graphite are made of?
Oxygen
Carbon
Hydrogen
Nitrogen
What is the smallest unit of an element?
Molecule
Atom
Compound
Cell
Where does the periodic table begin?
Lower right, with helium
Upper left, with hydrogen
Center, with carbon
Upper right, with oxygen
What is a chemical symbol in the periodic table?
A single lowercase letter
A single capital letter or a capital letter followed by a lowercase letter
Two capital letters
A number and a letter
What is the purpose of using chemical symbols in the periodic table?
To show the color of the element
To abbreviate the name of an element
To indicate the size of the atom
To display the atomic mass
How many known elements are there?
50
100
118
150
What is a compound?
A single atom of an element
A mixture of two or more elements
A chemical combination of two or more elements
A physical blend of substances
What is the atomic number of Chlorine (Cl) as shown in the periodic table?
1
17
35
7
What does a chemical formula represent?
The color of a substance
The taste of a substance
The makeup of a substance
The temperature of a substance
What do the small numbers written below and to the right of the letters in a chemical formula indicate?
The weight of the element
The number of atoms of each element
The color of the element
The temperature of the element
What is the chemical formula for water?
CO₂
NH₃
H₂O
O₂
Which chemical formula represents carbon dioxide?
O₂
H₂O
NH₃
CO₂
What is the chemical formula for ammonia?
H₂O
CO₂
NH₃
O₂
Which element is commonly used to make cooking pans due to its ability to conduct thermal energy?
Sodium (Na)
Aluminum (Al)
Silver (Ag)
Sulfur (S)
What is the chemical formula for table salt?
NaHCO₃
Ag₂S
NaCl
Cu
Which of the following is a compound?
Ar
CH₄
Hg
I₂
Which element is represented by the symbol 'Na'?
Nitrogen
Sodium
Neon
Nickel
What is the advantage of using ball-and-stick models in chemistry?
They are easier to draw
They show the 3D structure of molecules
They are less expensive
They use fewer colors
What is a physical change in matter?
A change that alters the chemical composition of a substance
A change that alters the form or appearance of matter without changing its substance
A change that creates a new substance
A change that involves a chemical reaction
What happens to a glass plate when it is accidentally dropped and broken?
It changes into a different substance
It remains the same material but changes form
It melts and becomes liquid
It evaporates into the air
What occurs when a frozen ice pop gets warm?
It changes from a liquid to a solid
It changes from a solid to a liquid
It changes into a gas
It remains unchanged
What happens when sugar is added to tea?
The sugar chemically reacts with the tea
The sugar and tea form a new substance
The sugar dissolves but remains the same substance
The sugar evaporates
What is a chemical change?
A change in matter where new substances form with different properties.
A change in matter where substances retain their original properties.
A change in matter that involves only physical alterations.
A change in matter that does not involve any new substances.
Which of the following is an example of a chemical change?
Melting ice
Inflating a balloon with air
Burning wood
Cutting paper
What happens when hydrogen and oxygen react with each other?
They form carbon dioxide.
They form water.
They form nitrogen gas.
They form sodium chloride.
What is a characteristic of a physical change?
It is often reversible.
It always produces a new substance.
It cannot be reversed.
It always involves a change in color.
Which of the following is an example of a chemical change?
Melting ice cubes
Burning wood
Freezing water
Cutting paper
What is a sign that a chemical change has occurred?
Change in shape
Change in color or odor
Change in size
Change in texture
Which of these can be formed when a chemical change occurs in a liquid?
A gas
A solid
A liquid
A plasma
What happens to thermal energy during a chemical change?
It is always absorbed.
It is always released.
It can be either absorbed or released.
It remains unchanged.
What type of change occurs when a candle burns?
Physical change
Chemical change
Both physical and chemical change
No change
When using colored markers on a posterboard, what type of change is occurring?
Physical change
Chemical change
Both physical and chemical change
No change
What does the phrase "as the crow flies" refer to in terms of distance?
A winding path
A straight line
A circular route
A zigzag path
What is the main difference between distance and displacement?
Distance is always shorter than displacement
Displacement includes direction, distance does not
Distance is measured in time, displacement in meters
Displacement is always longer than distance
In practical terms, why might distance be more meaningful than displacement?
It is always shorter
It follows a straight line
It accounts for the actual path taken
It is measured in kilometers
What is speed defined as in the context of motion?
The amount of time taken to travel a distance
The ratio of distance traveled to the amount of time taken
The distance traveled in a straight line
The time taken to travel a fixed distance
Which of the following units can be used to measure speed?
Miles per hour (mph)
meters per second (m/s)
meters per second squared (m/s²)
newtons (N)
What does the diagram with the car and road signs illustrate?
The car travels at a constant speed throughout
The car accelerates continuously
The car travels at varying speeds, slowing down and speeding up
The car remains stationary
What does speed tell you about an object?
The distance an object travels in a specific amount of time
The direction an object is moving
The color of the object
The weight of the object
What additional information does velocity provide that speed does not?
Color
Direction
Weight
Temperature
What is meant by "uniform motion"?
An object changing speed constantly
An object with a velocity that does not change
An object moving in a circular path
An object that is stationary
If two objects have the same speed but are moving in opposite directions, what can be said about their velocities?
They have the same velocity
They have opposite velocities
They have no velocity
They have a velocity of zero
What is the speed of the toy car at 1 meter east according to the data table?
1 m/s
0.5 m/s
2 m/s
0.25 m/s
At what position does the toy car have a velocity of 0.5 m/s east?
1 m east
2 m east
3 m east
4 m east
How long does it take for the toy car to reach 4 meters east?
4 seconds
6 seconds
8 seconds
10 seconds
What does a time-distance graph represent?
The color of an object
The position of an object as it changes with time
The weight of an object
The temperature of an object
In a distance-time graph, what does a steep slope indicate?
A slower speed
A constant speed
A faster speed
No movement
What does a flat or zero slope on a distance-time graph indicate?
The object is moving at a constant speed
The object is accelerating
The object has stopped
The object is moving backward
What does a straight line on a distance-time graph indicate?
Constant speed
Increasing speed
Decreasing speed
No movement
What does a negative slope on a displacement-time graph mean?
The object is accelerating
The object is moving back toward the starting point
The object is moving away from the starting point
The object is stationary
In the context of the sandpiper's movement, what does a flat line (zero slope) indicate?
The sandpiper is moving forward
The sandpiper is moving backward
The sandpiper is not moving
The sandpiper is moving sideways
What is the average velocity of the sandpiper if its displacement is zero?
Positive
Negative
Zero
Undefined
What does the graph in the image represent about Greg's motion after he realized he forgot his lunch?
Greg continued walking at the same speed.
Greg stopped and then returned home.
Greg ran faster to the bus stop.
Greg took a different route to the bus stop.
What does the theory of Continental Drift explain?
Ocean currents move continents around the planet
Convection works deep within the asthenosphere
Mid-ocean ridges force tectonic plates to move
Continents were once together and slowly drifted to where they are today
Tectonic plates are made of?
The mantle
Continental and oceanic lithosphere
The outer core
The mesosphere
Where are the youngest rocks on Earth found?
Along mid-ocean ridges
Along transform boundaries
On the edges of the continents
Near ocean trenches
Who was the scientist who proposed the theory of continental drift?
Alfred Powell
Harry Hess
Alfred Wegener
Ernest Rutherford
How far do tectonic plates move each year?
Meters per year
Centimeters per year
Kilometers per year
Feet per year
Where does seafloor spreading take place?
Convergent boundaries
The continentals shelves
Transform boundary
Mid-ocean ridges
What is the driving force behind the movement of the tectonic plates?
Gravity
Convection
Wave motion
Seismic activity
The super continent that existed when all continents were together was named
Gondwana
Laurasia
Eurasia
Pangea
What is the process of convection?
The process of hot material rising and cooler material sinking in circular patterns
The process of hot rock solidifying and forming new crust
The process of explaining what goes up must come down
Strong ocean currents moving tremendous amounts of material
This type of boundary creates rift zones and shallow earthquakes
Transform
Continental-Continental Convergent
Divergent
Oceanic-Continental Convergent
At this boundary plates slide past one and other and earthquakes are created
Transform
Continental-Continental Convergent
Divergent
Oceanic-Continental Convergent
At this boundary, old crust is destroyed and deep earthquakes occur
Transform
Continental-Continental Convergent
Divergent
Oceanic-Continental Convergent
Mountains are created along
Transform boundaries
Continental-Continental Convergent
Divergent
Oceanic-Continental Convergent
Volcanoes are created along
Divergent and Convergent boundaries
Transform and Convergent boundaries
Divergent and Transform boundaries
The boundary between Illionois and Wisconsin
Subduction zones occur along
Transform boundaries
Continental-Continental boundaries
Divergent boundaries
Oceanic-Continental boundaries
Ocean trenches are found along
Transform boundaries
Continental-Continental boundaries
Divergent boundaries
Oceanic-Continental boundaries
Earthquakes can happen along
All boundaries
Divergent and transform boundaries
Convergent and divergent boundaries
Transform and Convergent boundaries
How do the plates move along a divergent boundary?
They move towards one another
They move away from one another
They move past one another
One move up the other moves down
How do the plates move along convergent boundaries?
They move towards one another
They move away from one another
They move past one another
One moves up and one moves down
How do the plates move along transform boundaries?
They move towards one another
They move away from one another
They move past one another
one moves up and one moves down
True or False:
Organisms are living things
true
false
What is a producer?
organism that cannot make their own food so they eat other organisms
organism that makes their own food
organism that break down dead organisms
What is a decomposer?
an organism that breaks down dead organisms for energy
an organism that makes its own food
an organism that eats other organisms
Does a food chain start with the sun?
yes
no
What is a consumer?
an organism that breaks down dead organisms
an organism that makes its own energy and food
an organism that eats other organisms for energy
What is a food web?
a model that contains many food chains
a model that contains one food chain
a model that shows where the sun gets its energy
a model that shows how decomposers break down organisms
True or False:
A food web shows how energy flows through an ecosystem
true
false
What is the source of all energy?
water
food
decomposers
sun
If there is a change in the environment, the organism will either die or have to leave
true or false
true
false
What do the arrows in a food web show?
who is the most powerful
the next organism that uses the energy
the prey
the sun
All of the living and nonliving components that interact in an environment.
population
ecosystem
community
organism
LIVING things in an ecosystem ….
biotic
abiotic
ecosystem
A group of snake lives together in a specific area will make ….
organism
community
population
Rocks, air, sunlight and water are examples of ….
an ecosystem
biotic factors
abiotic factors
If humans over-hunted a population of insect-eating birds, what immediate change would likely be seen in the area?
Increased seedling germination
Increased populations of insects
Migration of small mammals
Severe loss of vegetation
In a pond ecosystem, what would happen to frogs if the insect population decreased?
There would be more frogs in the pond.
There would be more insects in the pond.
There would be less frogs in the pond.
More fish would move to the pond.
If the population of prey increases, the population of predators will ________because of the availability of food.
decrease
stay the same
increase
The number of herbivores would increase.
The number of plants would increase.
All organisms would adapt.
All living organisms would eventually die.
Both prokaryotic and eukaryotic cells have all of the following EXCEPT:
Cytoplasm
Ribosomes
DNA
Cell Wall
Eukaryotic cells are:
only unicellular
only multicellular
unicellular or multicellular
colonial
The plant organelle that captures light to make energy is the:
Cell Wall
Mitochondria
Chloroplast
Ribosome
An organism has a cell membrane, a mitochondria, and many small vacuoles. It is a(n)
Prokaryotic cell
Animal cell
Plant cell
Virus
The cell wall provides
Genetic Material
Energy
Structure
Proteins
What kind of cell is Euglena an example of?
Virus
Bacteria
Prokaryotic cell
Eukaryotic cell
What is this organism an example of? (select 2 answers)
Eukaryotic unicellular organism
Prokaryotic unicellular organism
Virus
Bacteria
The organelle where cellular respiration occurs is the:
Chloroplast
Mitochondria
Ribosome
Lysosome
Organelles in cells are called membrane-bound because
They are attached to the cell membrane
They are surrounded by their own membrane
What are D and E both a part of?
Endoplasmic reticulum
Cytoplasm
Ribosomes
Nucleus
Cytoplasm is (Select two answers)
The fluid that fills in the spaces between the cell structures
Number 3 in the picture
Number 4 in the picture
Found only in ghosts
Emily has brown hair. Which most likely explains why Emily has brown hair?
Emily's favorite color is brown
Emily has a parent with brown hair
Emily's older brother has brown hair
Which statement best supports why many offspring look similar to their parents?
offspring inherit traits from only one parent
offspring inherit traits from both parents
parents choose which traits to pass on to their offspring
What is a gene?
segments of code that appear on chromosomes
segments of code that appear on pistils
segments of code that are found in the brain
segments of code that are found in the heart
A group of similar organisms that do produce fertile offspring (offspring that can reproduce)
Species
Population
Generation
When species produce more offspring than can survive, this is called
Overproduction
Competition
Predation (predator/prey)
When resources are limited , organisms compete for these resources (food, land), and this is called...
Predation
Competition
Overproduction
Differences among individual members of the same species (think the finches) is called
natural selection
adaptation
variation
If green and brown moths live in a forest environment, the fact that the brown moths are easier to see and are less likely to survive is called
natural selection
overproduction
competition
In this forest environment, why do the green moths survive?
Their predators don't like the color green
They fly faster than the brown moths
Their coloring makes them better adapted to the environment
What eventually happens to a species when the environment changes and the organisms do not adapt?
Classification
Extinction
Overproduction
A behavior or structure that allows organisms to survive, reproduce, and pass on traits to offspring is called an
competition
variation
adaptation
Which of the following is NOT one of the four conditions necessary for natural selection to occur?
Overproduction
Struggle to Survive/Competition
Symbiosis
Which term refers to an organism that hunts and kills for food?
Prey
Predator
Which term refers to an organism that is hunted and eaten for food?
Predator
Prey
Who studied on the Galapagos Islands and came up with the theory of evolution with natural selection?
Isaac Newton
Gregor Mendel
Charles Darwin
Individuals in a population that have a variation which gives them an advantage in their environment (cactus with thorns) are more likely to...
die and not reproduce
survive and reproduce
move to a different environment
According to Darwin's theory of natural selection, the organisms that tend to survive are those that have
the biggest bodies
the ability to change their bodies to fit the environment
variations best suited to their environment
A mutualistic type of relationship is one where both organisms benefit (get something good out of it). Which example below displays a mutualistic relationship?
dog and tick
bee and flower
cattle egret and cow
A parasitic type of relationship is one where one organism benefits and the other organism is hurt or harmed. Which example below displays a parasitic relationship?
dog and tick
bee and flower
cattle egret and cow
If an organism has good fitness, what does that mean?
It runs fast and has ability to reproduce
It has great strength and the ability to reproduce
It survives and reproduces, passing on its favorable traits to offspring
What were some adaptations that prey use to avoid being captured and eaten?
Mimicry
Warning signals
camouflage
All of the above