Energy in Motion

A change of position is called ____________.

• change

• motion

• gravity

• work

One kind of invisible force is ____________.

• gravity

• work

• motion

• change

Objects cannot move unless a ________ causes them to move.

• gravity

• work

• motion

• force

When a force moves something, we say that _________ is done.

• gravity

• work

• motion

• force

Simple machines make work _________________.

• change

• motion

• easier

• harder

Energy can _______________ from one form to another.

• change

• motion

• work

• force

_____ is the pushing or pulling force caused by a magnet.

• magnetism

• friction

• gravity

• weight

_______ is a force that slows or stop motion.

• magnetism

• gravity

• friction

• weight

The force that pulls objects toward the center of the earth is called _______.

• magnetism

• gravity

• friction

• weight

The measure of the force of gravity on an object is called ________.

• magnetism

• gravity

• friction

• weight