Energy Review

What is energy?

• only sounds

• the ability to cause movement or create change.

• only light

• only electricity

What kind of energy is carried through wires?

• chemical energy

• electrical energy

• mechanical energy

• solar energy

Sound travels in

• waves

• energy

• temperature

• batteries

Light travels in

• energy

• temperature

• batteries

• waves

Kinetic and potential energy are two kinds of ____________ energy.

• chemical

• elastic

• mechanical

• stored

Food and batteries store energy in the form of __________________. (Batteries RELEASE electrical energy)

• heat energy

• kinetic energy

• electrical energy

• chemical energy

How does an object gain potential energy?

• by melting

• by falling

• by cooling off

• by getting raised up

When energy changes from one form to another, ________.

• the amount of energy increases

• some energy is always destroyed

• some energy is always changed into chemical energy

• some energy is always changed into a form we don't want

Things that give off light ___________

• always use electricity

• always use chemical energy

• usually give off heat, too

• usually give off potential energy

If you rub two objects against each other very quickly for a little while, what will happen?

• Both of the objects will cool off

• Both of the objects will warm up

• Both of the objects will give off light

• One of the objects will give off electricity