S8P1b Which type of arrangment and movement would particles of mercury display?

Particles are close together but they are able to slip past one another

Particles closely packed together and they vibrate back and forth

Particles are spread far apart and they move quickly

Particles are spread far apart and electrons are detached from atoms

S8P1b How is plasma different from gas?

Electrons separate from atoms in plasma

Plasma has a definite shape, but gas does not

Gas has a definite volume, but plasma does not

S8P1cd Which of the following is an example of a chemical change?

carbon joining with oxygen to form carbon dioxide

salt dissolving in water to form a solution

S8P1cd What happens during a physical change?

the form of a substance changes but not its identity

the identity of the substance is changed

S8P1cd When enough heat is added to liquid water, it boils, and bubbles of water vapor rise to the surface and into the air. Which type of change is this and why?

a physical change, because the substance changes state

a chemical change because gas is produced

a chemical change because heat is produced

a physical change because the identity fo the substance changes

S8P1f According to the law of conservation of matter, which of the following is true?

In a chemical reactions, the total mass of the reactants is equal to the total mass of the products

In a chemical reaction, the total mass of the reactants is greater than the total mass of the products.

In a chemical reaction, elements change into other elements, but new matter is not created

In a chemical reaction, matter cannot change form, but new matter can be created

S8P3b A rocket is traveling through the atmosphere at a constant velocity. Which of the following is true?

The rocket's engine is producing an unbalanced force that keeps the rocket in the air.

All the forces acting on the rocket are balanced

The rocket exerts a greater force on its exhaust gases than the gases exert on the rocket

The rocket is moving, so some net force must be acting on it

S8P3b Student A and Student B are each standing on a skateboard. Student A pushes gently on Student B to start her moving. Student B starts moving away from Student A. What will happen to Student A and why?

Student A will move away from Student B, because an equal and opposite force pushes on her

Student A will not move, because no forces are acting on her

Student A will move toward Student B, because the same force affects both of them

Student A will immediately stop moving because of friction

S8P3c How is an object's mass related to the force needed to accelerate the object?

The greater the mass, the greater the force needed

Mass determines the direction of the force needed

Mass determines the kind of force needed

The smaller the mass, the greater the force needed

S8P5a Which of the following statements about gravitational fields is true?

Any object that has a mass is surrounded by a gravitational field

Gravitational fields affect objects only when two objects are touching

Gravitational fields affect objects only if the objects are not in contact

Only very massive objects, such as Earth, are surrounded by a gravitational field

S8P3b When a rocket attempts to launch, its engine exerts a force downward. The rocket will not launch until the force of the engine is greater than the weight of the rocket. Why?

The force of the engine must be greater than the force of gravity to produce a net force upward.

The forces must be equal and balanced for the rocket to move

The force of the engine must be twice as strong as the force of gravity for the rocket to move

The rocket must move at a constant velocity to take off

S8P3b If an object falls far enough, it will reach terminal velocity. At this velocity, the force of air resistance is equal to the force of gravity on the object. The forces on the falling object are balanced. What will happen to the object and why?

The object will fall at a constant velocity because the forces on it are balanced

The object will accelerate toward the ground because gravity is pulling on it

The object will hover in midair because the forces on it are balanced

The object will decelerate until it reaches a full stop at the ground

S8P5abc Two balloons are rubbed with a wool cloth. When the balloons are held near one another, they push away from each other. Why does this happen?

The balloons have the same electric charge, so they repel each other

The balloons have the same magnetic charge, so they repel each other

The balloons have opposite magnetic charges, so they repel each other

The balloons have opposite charges, so they repel each other

S8P5abc Which of the following is evidence that a magnetic field surrounds a magnet?

When the north poles of two magnets are brought near each other, they push apart without touching

When a paper clip is placed on a bar magnet, it sticks to the magnet

When a magnet is placed on a metal surface, it sticks to the surface.

When you touch a metal doorknob, sometimes you receive a shock

S8P5abc Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 newtons. How will the amount of electric force between the particles change if the particles move closer together?

The electric force will increase

The electric force will decrease

The electric force will stay the same

The electric force will disappear

S8P5ac What does the iron core of an electromagnet do?

It produces a magnetic field that adds to the overall magnetic field of the electromagnet

It acts as a conductor, allowing more current to flow through the electromagnet

It acts as an insulator, protecting people from electric shocks

It produces the electric current that passes through the wire coil.

S8P5ac A student built a simple fan using an electromagnet, a permanent magnet, and a fan blade. When she connects the electromagnet to a single dry-cell battery, the fan blade turns. How would the student's fan most likely change if she connected it to two dry-cell batteries?

The fan blade would turn faster

The fan blade would turn slower

The fan would turn in the opposite direction

S8P2b A student throws a ball straight up. What happens to the ball's energy as it rises?

The kinetic energy of the ball changes into potential energy as the ball rises

The kinetic energy and potential energy of the ball do not change as it rises

The potential energy of the ball changes into kinetic energy as the ball rises

The kinetic energy of the ball decreases as it rises, but its potential energy does not change.

S8P2b A motor uses the magnetic field produced by an electric current to spin an armature. What kind of transformation takes place inside a motor?

electrical energy transforms to mechanical energy

chemical energy transforms to magnetic energy

thermal energy transforms to electrical energy

gravitational energy transforms to chemical energy

S8P2b Which of the following is the best example of a form of kinetic energy being transformed into a form of potential energy?

In a generator, an armature spinning in a magnetic field produces and electric current

During photosynthesis, plants use light from the sun to build sugar molecules

During combustion, fuel, such as wood or oil, is broken down chemically to produce heat and light

In a battery, a chemical reaction releases electrons that can flow as electric current

S8P2d In which direction does heat move?

from warmer areas to cooler areas

from cooler areas to warmer areas

between areas of equal temperature

S8P2d A metal spoon is placed in a pot of boiling water. Why does the spoon become hot over time?

Particles in the water collide with particles in the spoon, which then strike other particles in the spoon, transferring energy

Currents of hot matter travel up the spoon from the water

Light shining on the spoon causes it to become as hot as the water

Microwaves emitted by the hot water are absorbed by the spoon and transformed into thermal energy

S8P2d How is convection different from conduction?

Convection takes place only in liquids and gases, but conduction transfers heat in solids as well

Convection can transfer heat through a vacuum, but conduction cannot

Conduction can transfer heat through a vacuum, but convection cannot

Convection takes place only in solids, but conduction transfers heat in liquids and gases as well

S8P2d Which is an example of heat transfer through radiation?

Light from a fire shines on objects, which absorb the light and transform it into thermal energy

A fire consumes oxygen in air to produce ash and smoke

A fire heats a pot, which transfers heat to beans in the pot

A fire heats the air around it, which moves out from the fire in currents of warm air

S8P4a Which statement about waves is true?

All waves travel through a medium

All waves contain crests and troughs

All waves contain compressions and rarefactions

Physical Science

Quiz

•

Science

•

8th Grade

•

Practice Problem

•

Hard

•

NGSS

MS-PS1-1, MS-PS4-2, MS-PS1-5

+14

Standards-aligned

Charles Martinez

FREE Resource

68 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1a Which is an example of a mixture?

water

hydrogen gas

a blueberry muffin

a spoon made of the element silver

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1a Which of the following is an example of a pure substance?

a sample of oxygen gas

a solution of sugar water

a mixture of pasta and sauce

an alloy of iron and carbon

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1a Ammonia can be represented by the chemical formula NH₃. Which of the following best describes ammonia?

an atom

a compound

an element

a mixture

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1a An unknown substance is provided in a science class. It consists of particles that are different colors and different sizes. The particles are unevenly distributed throughout the substance. The substance is ___________.

an element

a compound

a homogeneous mixture

a heterogeneous mixture

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1a A diagram of a particle is shown above. The particle is most likely _________.

an atom

a molecule

a homogeneous mixture

a heterogeneous mixture

Tags

NGSS.MS-PS1-1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1e Which are the name and atomic number for the element?

K and 19

K and 39.098

Potassium and 19

Potassium and 39.098

Tags

NGSS.MS-PS1-1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

S8P1e An atom of the element has how many protons?

18

19

39

58

Tags

NGSS.MS-PS1-1

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Physical Science

68 questions

S8P1a Which is an example of a mixture?

S8P1a Which of the following is an example of a pure substance?

S8P1a Ammonia can be represented by the chemical formula NH₃. Which of the following best describes ammonia?

S8P1a An unknown substance is provided in a science class. It consists of particles that are different colors and different sizes. The particles are unevenly distributed throughout the substance. The substance is ___________.

S8P1a A diagram of a particle is shown above. The particle is most likely _________.

S8P1e Which are the name and atomic number for the element?

S8P1e An atom of the element has how many protons?

S8P1e Which of the following could be the chemical symbol representing the element cobalt?

S8P1e The model shows a neutral atom. How many protons are in this atom?

S8P1e In which period, or row, of the periodic table would you find this element?

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Physical Science

68 questions

S8P1a Which is an example of a mixture?

S8P1a Which of the following is an example of a pure substance?

S8P1a Ammonia can be represented by the chemical formula NH3. Which of the following best describes ammonia?

S8P1a An unknown substance is provided in a science class. It consists of particles that are different colors and different sizes. The particles are unevenly distributed throughout the substance. The substance is ___________.

S8P1a A diagram of a particle is shown above. The particle is most likely _________.

S8P1e Which are the name and atomic number for the element?

S8P1e An atom of the element has how many protons?

S8P1e Which of the following could be the chemical symbol representing the element cobalt?

S8P1e The model shows a neutral atom. How many protons are in this atom?

S8P1e In which period, or row, of the periodic table would you find this element?

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S8P1a Ammonia can be represented by the chemical formula NH₃. Which of the following best describes ammonia?