Unit 14 Science

materials that do not let light pass through them are called

• refraction

• light

• opague

• pitch

sound and light are forms of energy that are carried in

• motion

• waves

• reflection

• vibrations

water waves move in an ______ and _______ motion

• side to side

• left to right

• up, down

• all around

a disturbance that transmits energy

• pitch

• opague

• wave

• light

Other waves that you can not see. ________ is a series of vibrations traveling in waves.

• Sound

• Vibrations

• Light

• Volume

_________ are the back and forth movement of an object. When you pluck a guitar string, the string vibrates causing sound waves.

• volume

• pitch

• vibrations

• sound

musical instruments are not the only thing that make sound, these make sounds too

• striking the head of a nail with a hammer

• animals

• food

• God

all sound vibrations travel in _________ waves

• time

• sound

• compression

• noise

both compression and water waves are alike because

• they both carry vibrations

• the both move up and down

• they do not carry vibrations

• the both move side to

As a compression wave moves, molecules of air or other materials are pushed together or ________

• separated

• moved

• changed

• compressed