Unit 13 - Energy

When light bounces off a surface, it

• reflects

• vibrates

• stops

• runs

How is light reflected?

• It changes states of matter.

• It burns and gives off heat.

• It moves back and forth quickly.

• It bounces off a surface.

What is lighting?

• current electricity

• static electricity

• sound energy

• heat energy

What is one source of current electricity?

• a doorknob

• a storm cloud

• a battery

• animal fur

How does sound travel to the ears?

• by changes in temperature

• by an electric charge

• by a closed circuit

• by vibrations in the air

Where would one most likely find static electricity?

• in the ocean

• in a battery

• on the Sun

• in a storm cloud

What happens when air vibrates?

• the temperature rises

  
  

• sound is heard

• lightning strikes

• matter changes

What does a lamp need to work?

• heat energy

• static electricity

• sound energy

• current electricity

A sound’s ____________ tells  how high or low it is.

One way to change the state of matter is to  use ____________.