Science Review #3 Unit 8, Lesson 3

The number of vibrations happening over a period of time is ____________.

• vibration

• frequency

• high-pitch

A fast vibration produces a sound with a __________ pitch.

• high

• low

• slow

A slow vibration produces a sound with a ___________ pitch.

• low

• fast

• high

Large vibrations make __________ sounds.

• soft

• loud

• fast

Small vibrations make _____________ sounds.

• fast

• high

• soft

Use the decibel scale from page 95 (SB).

How many decibels are the leaves when they fall down?

• 20 decibels

• 0 decibels

• 10 decibels

Use the decibel scale from page 95 (SB).

How many decibels is considered extremely loud?

• 120

• 40

• 140

Use the decibel scale from page 95 (SB).

What sound source can produce dangerous levels of noise?

• trumpets

• people talking

• the leaves

One tip to keep your home quieter is:

• Play loud music

• Open the door and windows when there is noise outside.

• buy quiet toys

Another tip to keep my home quieter is:

• Use white noise machines.

• Play musical instruments five hours a day.

• Listen to rock music very loudly.