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11-17 Science Sound

Last updated about 5 years ago

5 questions

Note from the author:

https://www.youtube.com/watch?v=AxNdr0Bcx20
Sound through a medium

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https://www.youtube.com/watch?v=AxNdr0Bcx20   This is the link the the sound video.

Question 1

1.

What does propagation mean in this sentence?

be quiet

to transmit or spread

to be noisy

Question 2

2.

Why does sound travel slowest through gases?

The molecules in gases are lighter.

The molecules in gases are bigger.

The molecules in gases are farther apart.

Question 3

3.

Why did the sound change when your ear was on the desk?

The sound traveled through a solid, not through air. Since the medium changed, the sound changed.

The sound traveled through a vacuum.

The sound traveled through water.

Question 4

4.

Based on this chart, at what speed will sound travel through air?

6000 m/s

1500 m/s

350 m/s

Question 5

5.

Why doesn't sound travel through a vacuum?

The molecules are very close together.

There are no molecules to vibrate. Sound needs a medium to travel through.

The medium is a solid.