What Is Sound?

Question 1

5 Properties of sound;

Answer 1

1) Sound travels.
2) Sound can be reflected (it can bounce off of things).
3) Sound can be absorbed (it does not bounce off some things).
4) Sound can be modified/changed (e.g., pitch and loudness).
5) Sound is caused by vibrations.

Question 2

Why can you hear someone in another room?

Answer 2

Because sound travels.

Question 3

Why do we hear echoes?

Answer 3

Because sound can bounce.

Question 4

Why would a recording studio cover their walls with bumpy foam?

Answer 4

The foam would absorb some sound, so that the sound doesn’t travel to other rooms.

Question 5

What are some objects, which allow us increase the volume of a sound?

Answer 5

A microphone, headphones, megaphone & speakers.

Question 6

Name some natural sounds.

Answer 6

Birds, singing, whistling, rain, waterfalls, etc.

Question 7

Name some human made sounds.

Answer 7

A horn, speakers, instruments, etc.

Question 8

What is sound?

Answer 8

Sound is a vibration that our ears hear.

Question 9

If a tree falls in a forest and no one hears it, does it make a sound?

Answer 9

Yes, because it still causes the air to vibrate. The vibrations in the air are simply not received by anyone’s ear.