Question 1

In science, energy means the......

Accepted Answer

ability to do work.

Answer

ability to move fast.

Answer

position of an object.

Question 2

A ball is held at the top of an incline. The energy it has at this point is called.....

Accepted Answer

potential energy.

Answer

kinetic energy.

Answer

gravity.

Question 3

When you kick a soccer ball, you give it....

Accepted Answer

kinetic energy.

Answer

friction.

Answer

potential energy.

Question 4

Which is an example of mechanical energy?

Accepted Answer

a bicycle that moves when you pedal it.

Answer

a radio that you plug into a wall socket.

Answer

a flashlight that uses a battery.

Question 5

A toy that uses a battery is powered by.....

Accepted Answer

chemical energy.

Answer

mechanical energy.

Answer

electrical energy.

Question 6

Which of the these is an example of work being done?

Accepted Answer

You take out the trash.

Answer

You watch a TV program.

Answer

You read a difficult book.

Answer

You listen to your car's engine.

Question 7

The amount of work done depends on the amount of force you use and on....

Accepted Answer

how far the object moves.

Answer

whether you try your best.

Answer

how difficult the task it.

Answer

how heavy the object is.

Question 8

You push a large rock, but it does not move.  What has happened?

Accepted Answer

You have used force, but you have not done work.

Answer

You have not used force, and you have not done work.

Answer

You have added potential energy to the rock.

Answer

You have not used force, but you have done work.

Question 9

A simple machine is a machine that....

Accepted Answer

makes work easier.

Answer

does not have wheels.

Answer

does not use electricity.

Question 10

Which one of these is a compound machine?

Accepted Answer

motorcycle

Answer

inclined plane

Answer

pulley

Answer

wheel and axle

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