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Worksheets8th Science GMAS Review
Total questions: 68
Worksheet time: 34mins
In a chemistry class, Kai and Abigail are learning about the relationship between atoms and molecules. What is the relationship between atoms and molecules?
Atoms are larger than molecules
Molecules are groups of atoms bonded together
Atoms and molecules are the same thing
Molecules can only contain one type of atom
Which statement about pure substances is correct?
Pure substances can be easily separated into their parts
Pure substances can be either elements or mixtures
Pure substances contain only one type of atom or molecule
Pure substances must contain multiple elements
Hannah is making a fruit smoothie and notices that once blended, the mixture looks the same throughout. How is this homogeneous mixture different from a heterogeneous mixture?
Homogeneous mixtures cannot be separated
Homogeneous mixtures contain only one substance
Homogeneous mixtures are always solutions
Homogeneous mixtures are uniform throughout
William is conducting an experiment in his physics class. He wants to know which subatomic particle can leave an atom. Can you help him find out?
Protons
Neutrons
Electrons
None of the above
Harper is trying to separate a substance into its original components. What is a key characteristic of compounds that Harper should know?
They can be separated through physical methods
They contain only one type of element
They require chemical reactions to break apart
They are the same as mixtures
Priya is observing different materials in her science class. She notices that one type of material has particles that are packed together tightly and only vibrate in place. Which phase of matter is Priya observing?
Gas
Plasma
Solid
Liquid
Maya is heating a pot of water on the stove. What happens to the water when energy is added or removed?
It changes color
It changes phase
It disappears completely
It maintains its current state
Arjun is studying different states of matter in his science class. He learns about a state that can conduct electricity and create magnetic fields. Which of the following characteristics best describes this state?
Has definite shape and volume
Has definite volume but indefinite shape
Can conduct electricity and create magnetic fields
Particles only vibrate in place
Ava is observing a balloon filled with air. What is a key characteristic of the gas inside the balloon?
They have a definite shape
They have the least kinetic energy
They have definite volume
Their particles can move freely
Which statement about liquids is correct?
They have indefinite volume
They have the highest kinetic energy
Their particles can't move past each other
They have definite volume but changing shape
Aria is conducting an experiment in her science class. She needs to identify a physical property of a substance that can be observed without changing the substance. Which property should she focus on?
Flammability
Density
Reactivity
Toxicity
During a lab experiment, Lily mixed two clear liquids and observed a solid forming at the bottom of the beaker. This observation indicates:
A physical change only
A phase change
A chemical change
An irreversible physical change
Grace is conducting a science experiment to identify physical changes. Which set of changes contains ONLY physical changes?
Burning wood, melting ice, rusting iron
Dissolving sugar in water, folding paper, mixing ingredients
Baking a cake, cutting paper, digesting food
Souring milk, bleaching hair, crushing a can
Avery notices bubbles forming, a temperature change, and a new odor while cooking a meal. These observations suggest:
A reversible change occurred
Only physical properties were altered
A chemical reaction took place
No change occurred at all
David left a glass of milk on the kitchen counter overnight. What type of change occurs when the milk turns sour?
Physical change because it can be reversed
Physical change because only the taste changes
Chemical change because new substances form
Chemical change because the color changes slightly
Which of the following statements about the arrangement of elements on the periodic table is correct?
Atomic numbers increase from right to left and bottom to top
Metals are located on the right side of the periodic table
Elements in the same group have similar properties and number of valence electrons
Periods show the number of valence electrons in an element
Imagine you are at a party with Aria, Ethan, and Oliver, and there's a game where you need to complete a puzzle. Each of you has a piece, but Aria's piece is almost complete and only needs one more part to finish. Why is Aria's piece considered highly sought after in the game?
It has a full outer shell of pieces
It can easily lose its pieces
It only needs one more piece to complete
It has the same number of pieces as a completed puzzle
Jackson is trying to find out how many neutrons are in an atom of carbon. How should he calculate it?
Add the atomic number and atomic mass
Subtract the atomic mass from the atomic number
Look at the atomic number directly
Round the atomic mass to the nearest whole number and subtract the atomic number
In a science class, Sophia is learning about the periodic table. Which statement about periods in the periodic table is true?
There are 18 periods in total
Periods run vertically down the periodic table
Periods indicate the number of energy levels
Periods show the number of valence electrons
Aria and Mason are conducting an experiment in their chemistry class. They mix two substances in a sealed container. What happens to the total mass of all substances involved in the reaction?
The mass increases due to energy release
The mass remains exactly the same
The mass slightly decreases
The mass depends on room temperature
Which statement about balanced chemical equations is correct?
Products are always on the left side of the arrow
The number of atoms can change during the reaction
Reactants are always on the left side of the arrow
Coefficients cannot be changed to balance equations
Aria is building a model of a molecule using 10 carbon atoms. If she uses all the carbon atoms in the reactants, how many carbon atoms must be in the products?
5 carbon atoms
20 carbon atoms
10 carbon atoms
It depends on the type of reaction
Anika is trying to balance a chemical equation for her science project. What can she modify to achieve this?
The chemical symbols of elements
The subscripts in chemical formulas
The coefficients in front of compounds
The direction of the arrow
On a roller coaster, when does the car have the greatest potential energy?
At the bottom of a hill
At the top of a hill
Halfway down the hill
When accelerating up the hill
Aiden is playing on a swing. At the highest point of the swing, which statement about the relationship between kinetic and potential energy is correct?
They are directly proportional to each other
They are independent of each other
They are inversely proportional to each other
They always remain equal to each other
Rohan is riding his bicycle at a constant speed. What happens to the bicycle's kinetic energy if Rohan adds more weight to the bicycle by carrying a backpack, but his speed remains constant?
The kinetic energy decreases
The kinetic energy increases
The kinetic energy stays the same
The kinetic energy becomes zero
Which type of energy is NOT a form of potential energy?
Nuclear energy
Chemical energy
Sound energy
Gravitational energy
Abigail and Ethan are riding a roller coaster. At the halfway point down a roller coaster hill, what is true about the energy distribution?
All the energy is kinetic energy
All the energy is potential energy
The energy is equally divided between kinetic and potential energy
There is no energy present in the system
Oliver and Luna are visiting a hydroelectric power plant. They notice the dam holding back a large reservoir of water. What type of energy does this water represent?
Mechanical energy
Gravitational potential energy
Kinetic energy
Nuclear energy
When you turn on a light bulb, what energy transformation occurs?
Mechanical to thermal
Chemical to mechanical
Electrical to radiant
Nuclear to electrical
Noah is learning about different types of energy in his science class. His teacher asks, "Which of the following is NOT an example of chemical energy?"
Solar panels
Batteries
Food
Gasoline
In a car engine, what is the primary energy transformation that occurs?
Mechanical to chemical
Chemical to mechanical
Thermal to electrical
Radiant to mechanical
When Anika lights a match to start a campfire, what is the correct sequence of energy transformation?
Thermal to chemical to radiant
Radiant to chemical to thermal
Chemical to thermal and radiant
Mechanical to chemical to thermal
Aiden is cooking on a stove and notices that the handle of the metal pot gets hot even though it's not in direct flame. Which method of heat transfer is responsible for the handle getting hot?
Radiation
Convection
Conduction
Electromagnetic waves
When Isla feels the warmth of the sun on her skin while sitting in the park, which type of heat transfer is primarily occurring?
Convection
Radiation
Conduction
Particle collision
Emma is making soup in a pot of boiling water. She notices that the warm water rises while cooler water sinks. This occurs because:
Radiation causes the water molecules to move
The warm water has a higher density
Conduction transfers heat through the pot
The warm water has a lower density
Harper noticed that when she opened the window on a warm day, the warm air from outside seemed to rise while the cooler air inside her room sank. Which heat transfer method is responsible for this phenomenon?
Convection
Conduction
Radiation
Direct contact
Benjamin is sitting in his backyard on a sunny day and feels the warmth of the sun on his skin. This heat transfer through electromagnetic waves differs from other methods because:
It requires direct contact between objects
It only works in liquids
It can occur through empty space
It only happens in solids
Ethan is riding his bicycle down a hill. Which statement best describes the relationship between the kinetic energy of Ethan on his bicycle, the mass of the bicycle, and Ethan's speed?
Only the mass of the bicycle affects kinetic energy
Only Ethan's speed affects kinetic energy
Kinetic energy increases with greater mass of the bicycle and Ethan's speed
Kinetic energy decreases with greater mass of the bicycle and Ethan's speed
Emma is watching a car parked on the street. On a distance-time graph, what does a flat line indicate about the car's movement?
The object is accelerating
The object is stopped
The object is moving away from the starting position
The object is returning to the starting position
Noah is driving a car and wants to understand the difference between speed and velocity. What is the difference?
Speed is faster than velocity
Velocity includes direction while speed does not
Speed includes direction while velocity does not
They are exactly the same thing
Oliver is climbing a hill. How does his potential energy change as he climbs higher?
Potential energy remains the same
Potential energy decreases
Potential energy converts to kinetic energy
Potential energy increases
Isla is riding her bicycle and notices that on a velocity-time graph, the line representing her speed is sloping down. What does this indicate about her ride?
The object is accelerating
The object is moving at constant speed
The object is decelerating
The object has stopped completely
Which statement best describes Newton's First Law of Motion?
Objects in motion will always come to a stop
An object will remain in motion or at rest unless acted upon by a force
Every action has an equal and opposite reaction
Force equals mass times acceleration
Priya is driving a heavy truck and Aiden is driving a small car. Both vehicles are traveling at the same speed. Which vehicle has more inertia?
The small car because it's lighter
Both vehicles have the same inertia
The heavy truck because it has more mass
Neither vehicle has inertia while moving
Michael is pushing a shopping cart at the grocery store. According to Newton's Second Law of Motion, what happens when unbalanced forces act on the cart?
The cart's mass increases
The cart maintains its current state
The cart experiences equal and opposite reactions
The cart accelerates in the direction of the greater force
Why doesn't a book slide across a table on its own?
Because of air resistance
Because of normal force
Because of friction between the book and table
Because of gravitational force only
When a swimmer pushes water backward, they move forward. This best demonstrates:
The Law of Inertia
The Law of Acceleration
Newton's Third Law of Motion
The Law of Gravity
Anika and Maya are discussing different types of waves. Anika asks, "Which type of wave can travel through a vacuum?"
Surface waves
Electromagnetic waves
Longitudinal waves
All mechanical waves
Ava and Aria are at the beach watching the waves. They notice the distance between two consecutive crests of the waves. What is this distance called?
Amplitude
Compression
Wavelength
Rarefaction
What is the main characteristic of longitudinal waves?
They look like hills and valleys
They can travel through empty space
They move perpendicular to wave direction
Particles move parallel to wave direction
Which statement about mechanical waves is correct?
They can travel through a vacuum
They require a medium to travel
They are all electromagnetic waves
They transmit matter and energy
In a longitudinal wave, what term describes the areas where particles are crowded together?
Troughs
Crests
Compressions
Rarefactions
When light passes through a prism, what happens to it?
It maintains a straight path
It separates into the colors of the rainbow
It becomes completely absorbed
It only reflects red light
Which statement about sound waves is correct?
They travel fastest through air
They can travel through a vacuum
They travel fastest through solids
They don't need a medium to travel
Why do we see an object as white?
It absorbs all colors of light
It only reflects blue light
It reflects all colors of light
It only reflects green light
What happens during the diffraction of waves?
Waves change speed between mediums
Waves are completely absorbed
Waves bounce off surfaces
Waves spread out around corners or through holes
Which type of material allows most light to pass through while making objects appear blurry?
Opaque
Transparent
Translucent
Reflective
What happens to light when it passes through a convex lens?
Light rays spread out and diverge
Light rays converge to a focal point
Light rays reflect back in parallel
Light rays remain parallel throughout
Which type of optical device creates an upright image when light reflects off its surface?
Concave mirror
Concave lens
Convex mirror
Both a and b
A lens that "caves in" at the center and causes light to spread out after passing through it is called:
A convex lens
A plane lens
A concave lens
A bifocal lens
When light hits a concave mirror, what happens to the reflected light rays?
They spread out in different directions
They remain parallel to each other
They converge to a focal point
They reflect at right angles
How can you distinguish a convex lens from a concave lens by appearance?
The convex lens is perfectly flat while the concave lens bulges out
The convex lens caves in while the concave lens bulges out
The convex lens bulges out in the center while the concave lens caves in
There is no visible difference between them
Which statement best describes what happens when a magnet is broken in half?
One half becomes a north pole, the other becomes a south pole
Both halves become new complete magnets with north and south poles
The magnetic properties are completely lost
Only one half maintains magnetic properties
In the context of gravitational fields, what happens to the gravitational force between two objects when the distance between them increases?
The force remains constant
The force increases proportionally
The force decreases
The force doubles
How does an object become charged through the process of induction?
Two objects must physically touch each other
Electrons are transferred through friction
A charged object is brought near a neutral object without contact
The object must be struck by lightning
What occurs during electrical discharge?
Electrons flow from a positively charged object to a negatively charged object
Electrons flow from a negatively charged object to a positively charged object
Two neutral objects exchange protons
Two objects become neutrally charged
Which of the following materials would be the best insulator?
Copper wire
Aluminum foil
Plastic
Silver
