Unit 3 Post Test

1. When an electric current flows through a wire.

A. A gravitational field is created around the wire

B. The wire becomes very cold

C. The wire begins to spin

D. A magnetic field is created around the wire

2. When you climb to the top of the water slide, you are gaining.

A. Gravitational kinetic energy

B. Chemical potential energy

C. Gravitational potential energy

D. Chemical kinetic energy

3. Which of the following is true about the relationship between electricity and magnetism?

A. Electricity can be used to create a magnet

B. Electricity and magnetism cannot be converted to each other

C. Magnetism is based on how gravity attracts magnetism

D. Electricity and magnetism cancel each other out

4. When you walk across a rug on a cold dry winter day you might get a shock. What causes this shock?

A. Electrons moving from the rug to the wooden floor.

B. Electrons moving from the air to your hand

C. Electrons moving from your hand to the doorknob

D. Electrons moving from your hand to the rug

5. Energy that is stored is called?

A. Potential Energy

B. Static Energy

C. Kinetic Energy

D. Physical Energy

6. A waterfall is an example of?

A. energy being destroyed

B. energy being created

C. kinetic energy being converted to potential energy

D. potential energy being converted to kinetic energy

7. two airplanes are flying in such a way that the gravitational attractions between them decreases. the planes must be flying?

A. away from each other

B. next to each other at the same speed

C. toward each other

D. faster than the speed of sound

8. the force that keeps satellites in orbit around earth is called?

A. magnetic

B. friction

C. electrical

D. gravity

9. why does it take more force to move a heavy box up a ramp than the same box down the ramp.

A. there is more friction on the bottom of the box going up the ramp

B. gravity is pushing the box up the ramp at the same time you are pushing the box up the ramp

C. When you are pushing the box up the ramp you are working against atmospheric pressure

D. when you are pusing the box up the ramp gravity is pushing the box down the ramp

10. a baseball is picked up off the floor and placed on the edge of a table top. what type of energy does the ball now have?

A. chemical kinetic energy

B. chemical potential energy

C. gravitational kinetic energy

D. gravitational potential energy

11. which way of getting a rock to the top of a cliff will give the rock the most potentital energy?

A. lifting the rock will yield the most PE

B. using a ramp will yield the most PE

C. using the stairs will yield the most pe

D. it does not matter, they all produce the same pe

12. which of the following is an example of potential energy?

A. a turning propellar

B. a moving car

C. a battery

d. a glowing light bulb

13. which of the following procedures would increase the amount of electricity that is produced by a generator?

A. add more coils of wire

B. spin the magnet more slowly

C. use a weaker magnet

d. reduce the number of coils of wire

14. the energy in a battery is ________ energy.

A. kinetic

B. potential

C. magnetic

D. nuclear

15. which of these terms refers to energy waiting to be released?

A. kinetic

B. gravitational

C. potential

D. total

A.

B.

C.

D.

Drag and Drop

The strength of an electromagnet can be increased by ​ ​ ​

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the current through the wire and by ​

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the number of wire turns around the core. A stronger electromagnet will also be produced if ​

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wire is wrapped around a core consisting of a ​

Placeholder

. In general, ​

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the size of an electromagnet increases its strength.

Drag these tiles and drop them in the correct blank above

increasing

thick

metal

decreasing

thin

non metal

Match

Match the following

• gravitational

• nuclear

• elastic

• electric

• chemical

a car is at its greatest height at the top of the roller coaster

water is heated by the release of atomic particles in a reactor

a bungee jumper reachers the maximum distance from the jump point

two balloons rubbed on your hair repel each other

gasoline burns in an automobile engine

• a car is at its greatest height at the top of the roller coaster

• water is heated by the release of atomic particles in a reactor

• a bungee jumper reachers the maximum distance from the jump point

• two balloons rubbed on your hair repel each other

• gasoline burns in an automobile engine

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B.

C.

D.

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B.

C.

D.

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B.

C.

D.

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B.

C.

D.

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B.

C.

D.

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B.

C.

D.

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C.

D.

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D.