Sound

We cannot hear the sound of bat because this sound is too____________

• high

• low

• loud

Which are the source of sound?

• an ear defender

• a people are not talking

• a cat is purring

• a baby are crying

• an air plane is flying

When an object .........................., a sound is created.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The sound travels fastest in .......................................

• Gas

• Liquid

• solid

• vacuum

The sound can not travel thourgh ...................................

• Vacuum

• gas

• solid

• liquid

Tags

NGSS.MS-PS4-2

Which is the environment that the sound travels fastest?

• Under ocean

• soil

• the air on top of mountain

• space

Tags

NGSS.MS-PS4-2

Which sound has the highest pitch?

• cat purrs

• baby screams

• an old man talk

• the sound of human step

_____ shows how high or low a sound is.

_______ is the unit of volume.

A sound has too loud ______ can damage human 's ears.

• pitch

• volume

• amplifier

• decibel