Worksheets7th Grade Science Review
Total questions: 200
Worksheet time: 4hrs 37mins
Who is your science teacher?
Mr. Kimble
Ms. Roberts
Mr. Prichard
Mrs. Diaz
Mathematician, Astronomer, & Physicist who discovered gravity, laws of motion, calculus, reflecting telescope.
Isaac Newton
Marie Curie
Stephen Hawkings
AlexanderFleming
A student inflates a balloon attached to a plastic straw. A string is threaded through the straw and tied to opposite ends of the room. When the air in the balloon is released, the balloon travels the length of the string. Which of Newton's laws explain this?
The law of action-reaction
Newton's law of magnetism
The law of force and acceleration
The law of gravity
If a 40 kg student is pushed in a rolling chair with a force of 30 N, what is the student's acceleration?
(a)
A car driving down the road runs out of gas. Which of Newton's laws explains why the car continues to move without gasoline? Be able to explain why. This will be a constructed response question.
(a)
Which of the following would be a good example of Newton's third law of motion?
An air freshener hanging from the rear-view mirror of a car hangs still while the car moves forward with a constant acceleration
A carbon dioxide-fueled rocket launches upward into the air as carbon dioxide gas accelerates toward the ground below the rocket
Two balls of different masses are rolled with the same force, resulting in the ball with larger mass stopping faster than the ball with the smaller mass.
All of the above
Zoom into the image to read the question and answer
A
B
C
D
Match the following Law of motion with the correct example
Newton's 1st law of motion
Roll a ball across smooth/rough surfaces. The ball rolls faster on smooth because less fiction
Newton's 2nd law of motion
Hit a ball with 2 different forces, the ball will have greater acceleration due to larger force
Newton's 3rd of motion
Bouncing the ball on the court is the action, the floor pushing the ball back up is the reaction
Looking at the data table in the picture, match the following vehicle with it's correct force
Motorcycle
16,150 N
Car
25,620 N
Truck
23, 520 N
SUV
23,750 N
The risk of injury in a car accident is much greater if occupants do not wear a seat belt. Which of Newton's laws explain why this is true?
Law of force and acceleration
Law of gravity
Law of action and reaction
Law of inertia
Read the example given in the picture. Drag and drop correct answer to each box. Not all answers will be used.
These (a) are an example of the law (b) .
This law of motion states that heavier objects need a larger force to make them move.
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
All of the Above
Which best explains the law of force and acceleration (Newton's 2nd Law of Motion)
Restraints keep passengers from falling out of a roller coaster
Riders must be certain heights so they have enough mass to ride
A larger force will be required to accelerate a roller coaster with more people
A roller coaster that goes up must also come down due to the force of gravity
Magnetism is a force of ____________________________ that occurs between two _____________ objects.
attraction or repulsion, magnetic
external or internal, magnetic
external or repulsion, electronic
attraction or internal, electronic
A magnetic field is a field of force that is produced by moving ________ charges.
northern
positive
gravitational
electric
The magnetic ____________ around a bar magnet is shown above.
legs
flowers
field
direction
The Earth produces its own ________ field.
spectrum
electric
magnetic
progressive
A compass points toward the south pole of Earth's magnetic field, located near the Earth's geographical ________.
north
south
east
west
In magnetic materials, all of the ________ are pointing in the same direction.
doors
electrons
atoms
orbits
A permanent magnet is a material that produces a ___________________ field without any ___________________ magnetic field being present.
electronic, internal
magnetic, internal
magnetic, external
electronic, external
Permanent magnets can be demagnetized by ___________________ them past the Curie point (approximately 1,060 °F).
heating
freezing
shaking
solidifying
Every magnet has both a _________ pole and a __________ pole.
North, South
East, West
Positive, Negative
Positive, South
Certain materials respond to magnetic fields by becoming ______________ themselves. ____________ is one of these materials.
magnetic, Plastic
electronic, Iron
magnetic, Iron
electronic, Plastic
Some objects that normally aren't magnetic can become magnetized when connected to an electric circuit. Items that are magnetized in this way are called ________.
electromagnets
electrons
electrochromic devices
permanent magnets
Probably the most useful thing about electromagnets is that they can be turned ________ and ________.
on, off
positive, negative
north, south
on, negative
If two magnets are close together, the magnetic force will be ________.
smelly
weak
strong
positive
If two magnets are placed so that a north pole and a south pole are facing each other, they will _____________ each other.
date
spin
repel
attract
If two magnets are placed so that two ____________ poles or two ____________ poles are facing each other, they will repel each other.
North, South
external, internal
positive, negative
North, West
Although magnetic fields are _____________, one common way that people investigate them is to use ________ filings.
invisible, iron
touchable, iron
invisible, plastic
touchable, plastic
By sprinkling iron filings in a magnetic field on a flat surface, it is possible to see the __________ of a magnetic field.
shape
distance
mass
temperature
The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.
opposite
like
positive
negative
The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.
like
opposite
positive
negative
A horseshoe magnet will generate a magnetic field similar in shape to that of two ________ poles brought near each other.
like
opposite
positive
negative
The force that causes objects with mass to attract to one another:
Weight
Gravity
Mass
Magnetism
The gravitational attraction between two objects would increase if both masses are –
increased, and the distance between them is increased.
increased, and the distance between them is decreased.
decreased, and the distance between them is decreased.
decreased, and the distance between them is increased.
Why do planets orbit the Sun?
The Sun is the only celestial object that has a gravitational pull.
The Sun’s chemical composition makes it attract planets.
Only celestial bodies that emit light, like the Sun, can be at the center of an orbit.
The Sun is the most massive object in our solar system, so it exerts the greatest gravitational pull.
Gravity can be defined as the –
force of attraction between two or more masses.
friction created when two objects are in contact.
energy given off by stars due to nuclear reactions.
path an object follows as it moves through space.
As distance between two objects increases, the pull of gravity
increases.
decreases.
stays the same.
has no effect.
Which of the following will NOT change in different gravities?
The STREAK OF LIGHT produced by a falling chunk of rock from space is a(n) ____________ .
meteorite
real star
meteor
asteroid
Why are we pulled to Earth's center and NOT the sun's?
The sun is very LARGE
The sun is very FAR AWAY
Earth has a STRONGER GRAVITY than the sun
Earth ORBITS around the sun
What would happen to Earth without the sun's gravity?
Earth would DRIFT INTO SPACE
Earth would ORBIT the sun
Earth would be SMALLER
Earth would get CLOSER TO OTHER PLANETS
Two factors effecting the magnitude of the force of gravity between 2 objects are...
weight and mass.
distance and weight.
mass and matter.
mass and distance.
It is the same, mass doesn´t change
In both planets.
A. Wavelength
B. Amplitude
C. Speed
D. Frequency
A. Wavelength
B. Amplitude
C. Speed
D. Frequency
A. Wavelength
B. Amplitude
C. Speed
D. Frequency
A. Crest
B. Compression
C. Rarefaction
D. Trough
A. Crest
B. Compression
C. Rarefaction
D. Trough
If a wave has an amplitude of 2 and the next wave has an amplitude of 4. The second wave is (a) times larger . Which means the energy has increased by (b) .
A wave starts out with an amplitude of 3 and increases to an amplitude of 9. The wave second wave is (a) times larger than the first wave and has (b) times more energy
A wave has 25 crests in 120 seconds and they are 5 meters apart. What is the frequency?
0.208
0.333
4.8
0.041
A wave has crests that are 8 meters apart; 10 crests move past a point in 30 seconds. What is the frequency?
0.8
0.33
3
1.25
Which of the following terms describes a Vector and it's proper units?
position in seconds
distance in meters
speed in hours
velocity in m/s
A car goes from rest to 30 m/s. If it takes the car 40 seconds to reach that speed then what is the car's rate of acceleration?
1.33 m/s2
0.75 m/s2
10 m/s2
0 m/s2
A car is traveling south for 250 meters over the course of 100 seconds. What was the car's average velocity?
0.4 m/s south
0.4 m/s
2.5 m/s
2.5 m/s south
What is the average velocity of the object between 0 and 10 seconds?
6.0 m/s
1.5 m/s
-4 m/s
0 m/s
What is the average velocity of the object between 10 and 15 seconds?
6 m/s
1.5 m/s
-4 m/s
0 m/s
What is the average velocity of the object between 15 and 40 seconds?
6.0 m/s
1.5 m/s
-4 m/s
0 m/s
What is the rate of acceleration of the object between 0 and 4 seconds?
1 m/s
0 m/s2
-1 m/s2
1 m/s2
What is the velocity of the object between 4 and 5 seconds?
0 m/s
5 m/s
1 m/s
2 m/s
Which graph(s) represents a constant velocity?
a and c
b and c
c
a and b
Horse A is running East at a speed of 6 m/s. Horse B is running at a speed of 8 m/s East as it passes Horse A. What is Horse B's velocity relative to Horse A?
14 m/s
-2 m/s
2 m/s
48 m/s
What role does heat play in the formation of convection currents?
When water loses heat, it becomes denser and sinks.
When water gains heat, it becomes denser and sinks.
When water loses heat to cooler water, the cooler water becomes denser and sinks
Which action can cause an increase in density that results in a deep ocean current?
The sun heats the water’s surface.
An iceberg melts, adding fresh water to ocean water.
Warm water loses energy to its surroundings and cools.
Suppose a massive amount of salt was suddenly dumped into one region of the ocean. The movement of water would be affected by the sudden increase in salt. Identify the changes in salinity and density.
(a)
Suppose a massive amount of salt was suddenly dumped into one region of the ocean. The movement of water would be affected by the sudden increase in salt. What type of ocean current would result.
surface current
deep current
convection current
Most of the energy that powers ocean waves and ocean currents ultimately comes from the sun. Describe how ocean waves and ocean currents transfer solar energy around the globe.
(a)
The movements of water far below the ocean's surface
Deep Currents
The movement of water near the surface
Surface Currents
The curvature of ocean currents due to the rotation of the Earth on it's axis
Coriolis Effect
The movement of water due to the difference in density
Convection
Water in the Northern Hemisphere circulates in a (a) direction.
Water in the Southern Hemisphere circulates in a (a) direction.
Which of these factors deflects surface currents?
wind
continents
Coriolis Effect
gyres
Which of these transfers energy to surface currents?
wind
continents
Coriolis Effect
gyres
Which one of these causes surface currents to flow in huge circular patterns?
wind
continents
Coriolis effect
gyres
Which of these is NOT a factor that affects deep currents?
temperature
salinity
gravity
continents
earthquakes
What is the definition of upwelling in relation to ocean currents?
Movement of water towards the equator
Vertical movement of cold, nutrient-rich water towards the surface
Horizontal movement of warm water away from the equator
Formation of large whirlpools in the ocean
How do ocean currents primarily affect climate?
By redistributing heat around the planet
By increasing precipitation
By causing earthquakes
By decreasing evaporation rates
Which ocean current is responsible for bringing warm water from the Gulf of Mexico to northwestern Europe?
Gulf Stream
Labrador Current
California Current
Canary Current
As fresh water from the polar ice caps melt and flows into the North Atlantic Ocean, the salinity of the water in the Northern Atlantic will __________.
increase
decrease
remain the same
speed up
slow down
Which example is a form of precipitation?
Dew
Fog
Frost
Hail
In which area would the rate of evaporation be the lowest?
Over the ocean
Over the mountains
Over the rainforest
Over the desert
As a part of the water cycle, water from Earth's surface enters the clouds and finally falls back to the ground in the form of rain. What is the correct sequence of processes water undergoes?
Evaporation, Condensation, Precipitation
Precipitation, Condensation, Evaporation
Condensation, Evaporation, Precipitation
Evaporation, Precipitation, Condensation
What would happen if the Sun is removed from the water cycle?
The water cycle would not include precipitation but would continue with groundwater flow.
The water cycle would no longer occur because the Sun provides the energy for evaporation and transpiration.
The water cycle would no longer occur because the Sun provides energy for the formation of clouds.
The water cycle would not include evaporation and transpiration but would continue with condensation.
A student draws a model to represent the processes involved in the water cycle, as shown. To which process is the formation of clouds related?
Condensation
Evaporation
Freezing
Melting
The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?
W
X
Y
Z
On Earth, what process generates most of the water vapor?
Condensation
Evaporation
Precipitation
Transpiration
Rain and snow are two different forms of precipitation that fall on Earth's surface. Which factor is responsible for there being different forms of precipitation?
Evaporation
Run-off
Temperature
Transpiration
What is precipitation?
Sweat from our bodies on hot days
Warm rain but not cold snow or sleet
Gas that we use in furnaces or ovens
Any form of water that falls from the sky
What is another name or synonym for the water cycle?
Geologic cycle
Hydrologic cycle
Geosphere
Carbon cycle
What is the energy source that drives the water cycle?
The moon T
The heat from our home in the winter all around the world
The sun
he heat generated solely from the core of the earth
What are formed when water vapor condenses?
Clouds
Mountains
Transpiration
Valleys
The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat. ____________________
Evaporation
Convection
Precipitation
Transpiration
Water in its gas form is called ____________________,
water vapor
precipitation
ice
air
Which of the following contains the largest percentage of the Earth's water?
A. Atmosphere
B. Oceans
C. Ice/Snow
D. Vegetation
What sequence of processes transports water from the ocean into a cloud?
a) Evaporation and condensation.
b) Condensation and freezing.
c) Precipitation and condensation.
d) Evaporation and precipitation.
Select the words that accurately complete the following statement. Water in the clouds in this scene eventually moves from the atmosphere to the land by (infiltration) / (precipitation) / (evaporation). Next, (transpiration) / (melting) / (runoff) carries that water to the sea. (Wind) / (Gravity) drives both examples of water movement.
a) Precipitation, runoff, gravity
b) Infiltration, melting, wind
c) Evaporation, transpiration, wind
d) Precipitation, melting, gravity
What is the leading edge of an air mass called?
thunderstorm
high pressure system
front
low pressure system
Does this diagram show a warm front or a cold front?
Cold front
Warm front
You are climbing a mountain. as you climb the air pressure is...
not changing
increasing
decreasing
In a high pressure system the weather will likely be...
cold, clear, and stormy
cold, cloudy, and rainy
warm, cloudy, and stormy
warmer, clear, and sunny
Winds are caused by differences in...
air pressure
humidity
temperature
precipitation
Does cold air rise or sink?
rise
sink
What is the weather instrument that measures air pressure?
wind vane
anemometer
thermometer
barometer
Check all that apply. In a low pressure system ______________.
air rises and cools
clockwise winds spread outward
counterclockwise winds move inward
air sinks and gets warmer
What is a large body of air with about the same temperature, density, humidity, and pressure throughout it called?
cloud
front
air mass
In a low pressure system the weather will likely be...
cold, clear, and stormy
cold, cloudy, and rainy
warm, cloudy, and stormy
warmer, clear, and sunny
Some hurricanes originate in the tropical regions of the Atlantic Ocean or Caribbean Sea, and they often travel along the coast of Florida. The figure shows a hurricane cloud that formed over the Atlantic Ocean. Which two processes would be responsible for cloud formation in a hurricane?
freezing and condensation
evaporation and precipitation
evaporation and condensation
condensation and precipitation
A high-pressure system is approaching Florida, as shown in the map. How does air flow in a high-pressure system? Remember, the Earth rotates counterclockwise.
from north to south
from south to north
in the same direction as Earth’s rotation
in the opposite direction of Earth’s rotation
A jet stream is a narrow belt of fast-moving wind several kilometers above Earth. Jet streams flow along the boundaries between warm and cool air. Which map shows the jet stream pulling the most warm air into Canada?
Which symbol represents a stationary front?
A.
B.
C.
D.
Air masses that originate over land are called __________________________.
polar
continental
maritime
tropical
What conditions are most likely to produce a hurricane?
A. Low pressure system over warm land
B. Low pressure system over warm ocean water
C. High pressure system over cold land
D. High pressure system over cold ocean water
Where does a hurricane get its energy?
A. Warm ocean waters
B. High air pressure
C. Winds along the ocean’s surface
D. Sun
E. Heat from the land
What happens to hurricanes when they move over land? Check all that apply.
Wind speeds increase
Wind speeds decrease
Precipitation increases
Precipitation decreases
Storm intensity increases
What does Doppler RADAR measure? Check all that apply.
A. Measures temperature
B. Measures wind velocity
C. Measures wind direction
D. Measures air pressure
E. Measures precipitation
Which image represents a low pressure system?
Image A
Image B
Any sample of matter has mass and takes up space. The main reason for this is because:
a) All matter is heavy
b) Matter can be a gas
c) Matter is made up of tiny particles that have mass and take up space
d) The Earth is made of matter
Water drops stay together on wax paper and they don’t break apart easily. This is mainly because:
a) Water molecules are small
b) Water molecules are in motion
c) Water molecules are attracted to each other
d) Water molecules are wet
When you bring two drops of water near each other and allow them to touch, they combine immediately and become one drop. This is mainly because:
a) Water molecules are made of atoms
b) Water molecules are attracted to each other
c) Water molecules are magnetic
d) Water is a liquid
If you put food coloring in room temperature water, the coloring spreads throughout the water. The water causes the color to spread mainly because:
a) Water molecules are warm
b) Water molecules are in motion
c) Water is more dense than food coloring
d) Food coloring molecules are small
Food coloring spreads out faster in hot water than in cold water. This is mainly because:
a) The water molecules in hot water move more quickly
b) The molecules in hot water are larger
c) The food coloring molecules are small
d) Hot water is less dense
When a thermometer is heated, the red liquid inside the thermometer moves up. This is mainly because:
a) The red liquid is thin.
b) The molecules of the liquid move faster and get a little further apart
c) Hot liquid is lighter
d) The glass of the thermometer gets hot
When a thermometer is cooled, the red liquid inside the thermometer moves down. This is mainly because:
a) Cold liquids sink
b) The glass of the thermometer gets cold
c) The molecules of the liquid move slower and get a little closer together
d) The red liquid is thick
When you heat a sample of a solid, the particles that make up the solid:
a) Get bigger
b) Loose mass
c) Move faster
d) Slow down
When you heat a sample of a solid, the sample gets a little bigger. This is mainly because:
a) The particles move faster and get a little further apart
b) Heat helps the particles grow
c) Heating the sample makes it lighter
d) Heating helps the particles slide past each other
When you heat a sample of gas, what happens to the particles that make up the gas?
a) The particles move faster
b) The particles break apart
c) The particles get smaller
d) The particles become more dense
Check all that apply. To describe a liquid, you could say:
a) The particles of a liquid are attracted to one another
b) The particles of a liquid are in motion
c) The particles of a liquid are able to move past one another
d) A liquid has mass and takes up space
Check all that apply. To describe a solid, you could say:
a) The particles of a solid are attracted to each other
b) The particles of a solid can move past one another
c) The particles of a solid vibrate but do not move past one another
d) A solid has mass and takes up space
To describe a gas, you could say:
a) The particles are very attracted to each other
b) The particles are not very attracted to each other
c) The particles are close together like a liquid
d) The particles of a gas are further apart than the particles in a liquid or solid
Which image represents a gas?
A.
B.
C.
Which image represents a solid?
A.
B.
C.
The graph shows
positive acceleration
negative acceleration
constant acceleration
increasing acceleration
If an object has a positive velocity and a positive acceleration it is...
Speeding up
Slowing down
Changing direction
Stopping
If you increase your velocity from rest to +3 m/s and your friend increases his velocity from rest to +5 m/s, who has the biggest acceleration?
You
Your friend
Both the same
If someone runs a mile at 5 m/s the whole time, what is his acceleration?
0 m/s2
5 m/s2
2.5 m/s2
1 m/s2
Which equation will help you solve this problem?
Speed = _______________
Distance + time
Distance – time
Distance x time
Distance / time
This occurs when an object speeds up, slows down, or changes direction.
Speed
Velocity
Acceleration
Another way to explain the speed and direction of a object would be to describe it’s ________
Speed
Velocity
Acceleration
Velocity = _______________
Speed – direction
Speed + direction
Speed x direction
Speed / direction
At what speed would a car have to move in order to travel 20 kilometers in 2 hours.
5 km/hr
10 km/hr
20 km/hr
40 km/hr
Which of the following is a unit of speed?
km/hr
Minutes
Centimeters
meters
A car initially traveling at 8.0 meters per second doubles its speed while traveling in a northeast direction.
Students used a table to record the initial and final conditions for speed and velocity.
Which table is correct?
Which statement best describes the motion of the toy vehicle during the first 30 seconds of the investigation?
The vehicle was traveling at a constant speed
The vehicle was accelerating at a constant rate
The speed of the vehicle was increasing
The acceleration of the vehicle was increasing
Which statement best describes the cart?
The cart was stationary with a velocity of 0 m/s for the entire 7 seconds
The cart was stationary except for a short burst of acceleration of 0.5 m/s2
The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds
The cart accelerated at a constant rate of approximately 0.8 m/s2
Match the following
Speed
30 m/s
Velocity
30 m/s east
Acceleration
30 m/s2
Which of the following best describes the velocity of an object?
30 (a)
What is the difference between the velocity and the speed of an object?
Velocity is the change in distance over time, while speed is the change in velocity over time.
Velocity has a direction associated with it, while speed has no specific direction
Velocity has no direction associated with it, while speed has a specific direction
Velocity is the change in speed over time, while speed is the change in distance over time
The pickup truck has a changing velocity because the pickup truck -
can accelerate faster than the other two vehicles
is traveling in the opposite direction from the other two vehicles
is traveling on a curve in the road
needs a large amount of force to move
