A position vs. time graph goes from a positive slope to a negative slope. What did the object do to cause this?

The object changed the direction of its motion.

The object increased its speed.

The object decreased its speed.

Which of the following is not a property of electromagnetic waves?

They are oscillations of particles in a medium.

They travel at different speeds through different media.

Why are gamma rays dangerous to humans while radio waves are not?

Gamma Rays have short wavelengths while radio waves have long wavelengths

Gama Rays have long wavelengths while radio waves have short wavelengths

Radio waves are in fact harmful to humans

Gamma Rays are not harmful to humans

A physics student misspoke when he gave a presentation. He stated that the total energy of a substance is best demonstrated by its temperature. It would have been most correct for him to say that

the total kinetic energy is demonstrated by the substance's thermal energy.

the total energy is demonstrated by the substance's specific heat.

the average kinetic energy is demonstrated by the substance's thermal energy.

the mass determines the substance's average kinetic energy.

A rock falls from the top of a cliff. What will happen to the rock's kinetic energy when it strikes the ground below?

In addition to converting to potential energy, it will transform into other forms of energy such as sound

It will only create an equal amount of potential energy.

It will increase the total kinetic energy of the universe

Suppose the initial kinetic energy and final potential energy in an experiment are both zero. What can you conclude?

The final kinetic energy is equal to the initial potential energy.

The initial potential energy is zero.

The final kinetic energy is zero.

The sum of the initial and final kinetic energies is zero.

A bouncing ball eventually comes to rest. What happened to the ball's kinetic and potential energy?

It has been converted to other forms; the total amount of energy in the universe remains unchanged.

It has been permanently destroyed, reducing the total energy of the universe.

It has transferred to the surroundings, increasing the total energy available in the universe.

The ball's motion temporarily increased the amount of energy in the universe, but the level returned to its former value as the ball came to rest.

A scientist performs an experiment involving the collision of two masses on a flat surface. She believes she has made a startling discovery: the total kinetic energy is not conserved. What might she have overlooked?

Some energy may have been lost due to friction and/or sound.

Some gravitational potential energy may have been gained.

Some gravitational potential energy may have been lost

Some energy may have been gained due to friction and/or sound.

Wood is burned to heat a house. This is an example of the conversion of

chemical energy to thermal energy.

kinetic energy to thermal energy

thermal energy to kinetic energy.

thermal energy to chemical energy.

What energy transformation occurs first when a compressed spring is released?

kinetic to gravitational potential

elastic potential to gravitational potential

Explain why sound energy is not a type of potential energy.

It does not depend on the position or configuration of the system.

It does not depend on the mass of the system.

It does not depend on the age of the system.

It does not depend on the temperature of the system.

Which of the following objects has no kinetic energy?

delivery truck stopped at a light

diver falling from a diving board

Which qualities describe the mass and charge of an electron?

mass 1/1836 that of a proton; negative charge

mass 1/1836 that of a proton; positive charge

mass equal to that of a proton; negative charge

mass equal to that of a proton; positive charge

Which atom has the greatest mass?

an atom with 8 protons, 8 neutrons, and 8 electrons

an atom with 7 protons, 8 neutrons, and 7 electrons

an atom with 8 protons, 7 neutrons, and 8 electrons

an atom with 9 protons, 6 neutrons, and 9 electrons

What was the major difference between Dalton's model of the atom and the plum pudding model of the atom?

the addition of electrons to the model of the atom

the addition of neutrons to the model of the atom

the addition of protons to the model of the atom

the addition of orbitals to the model of the atom

During which of the following events would a chemical change occur?

dissolving drink mix powder in water

A chemist examines two compounds. Both are clear, odorless liquids. Which of the following would not indicate that a chemical change has occurred when the two compounds are combined?

The product is also clear and odorless.

The product remains clear but bubbles form.

The product remains clear but a new smell is apparent.

The product remains odorless but turns blue

Which of the following is NOT a definition for force

Any influence that can cause a change in an object's motion

a push or pull one object exerts on another

all of the possible answers occur

If an object starts to accelerate..

an unbalanced force is acting on it

a balanced force is acting on it

Physical Science Final Exam

Authored by Lydia Prince

Science

8th Grade

NGSS covered

Used 58+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following describes a solid?

definite shape, indefinite volume

definite shape, definite volume

indefinite shape, definite volume

indefinite shape, indefinite volume

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes a gas?

definite shape, definite volume

positive charged ions and free electrons

indefinite shape, indefinite volume

indefinite shape, definite volume

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The two factors that affect gravitational attraction are ________.

weight and distance

force and mass

mass and distance

mass and weight

The gravitational attraction between a large object and a small object _

is less than the attraction between two small objects the same distance apart

is greater than the attraction between two small objects the same distance apart

is greater than the attraction between any two smaller objects

is less than the attraction between any two larger objects

How is your weight different on Earth and on the moon?

You weigh more on Earth because the force of attraction is weaker.

You weigh less on Earth because the force of attraction is weaker.

You weigh the same because the force of attraction is equal.

You weigh more on Earth because the force of attraction is stronger.

If the slope of a position vs. time graph is negative, what does that imply about the motion of an object.

The object is moving in the negative direction.

The object turned around.

The object has a negative acceleration.

all of the above

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the slope of a velocity-time graph reveal about an object's motion?

the acceleration of the object

none of the above are revealed

the velocity of the object

the object's change in position over time

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Physical Science Final Exam

Which of the following describes a solid?

Which of the following best describes a gas?

The two factors that affect gravitational attraction are ________.

The gravitational attraction between a large object and a small object _

How is your weight different on Earth and on the moon?

If the slope of a position vs. time graph is negative, what does that imply about the motion of an object.

What does the slope of a velocity-time graph reveal about an object's motion?

A position vs. time graph goes from a positive slope to a negative slope. What did the object do to cause this?

Which of the following is not a property of electromagnetic waves?

Observe the following diagram of the electromagnetic spectrum. What term should be written in the blank space shown?

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