7. Energy and movement- Elastic and springs

Elastic

A material that returns to its original shape after being stretched

Catapult

A device that uses stretched elastic to launch objects

Stretch

To pull something to make it longer or wider

Compress

To squeeze or press something to make it smaller

Store

To keep something for later use

Potential energy

Energy that is stored and ready to be used

Spring

A coiled piece of metal that can be stretched or compressed

Movement energy

Energy that makes things move

Twist

To turn or wind something around

Propeller

A device with blades that spin to create movement

Pogo stick

A toy with a spring that helps you bounce

Slinky

A toy spring that can move down stairs by itself

Energy

The ability to do work or cause movement

Release

To let go or set free

Original shape

The normal form of something before it's changed