How does sound travel through different mediums?

Where does sound travel best? Solids? Liquids? Gases?

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Form a hypothesis. Be sure to explain your thinking.​

​How does sound travel?

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Poll

Through which medium can you hear sound the best?

• Solids

• Liquids

• Gases

• Outer Space

1. Strike the tuning fork with a pencil. Listen to how sound travels through the air (gas).

2. Have your partner place the bag of water (liquid) against his or her ear. Strike the tuning fork with a pencil. Have your partner listen to how sound travels through the water (liquid).​ Switch roles.

3. ​Have your partneer place his or her ear on the desk (solid). Strike the tuning fork with a pencil. Have your partner listen to how sound travels through the desk (solid).​ Switch roles.

​Experiment time!!!

1. ​Solids

2. Liquids

3. Gases​

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​​Where does sound travel best?

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​​Why does sound travel better in different forms of matter? Discuss with your partner.

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​The denser the form of matter, the better sound waves travel. 1. Solid - particles are close togehter. 2. Liquid - particles are farther apart. 3. Gas - particles are spread even farther apart. When particles are close together sound waves travel better.

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​It's all about density!

​Look at the picture for a clue. Discuss.

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​Where can sound NOT travel?

Sound must have matter to travel. There is no matter in space.​

​Sound cannot travel in outer space!

in outer space.

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Why? Sound needs matter to travel. There is no matter in space.​

​Sound cannot travel:

1. Solids

2. Liquids

3. Gases

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The denser the object the better.​

​Sound travels best through:

​Summary - Notes

S

Multiple Choice

Where can sound NOT travel?

• Through solids

• Outer Space

• Through liquids

• Through gases

Multiple Choice

Through which form of matter does sound travel the best?

• Solids

• Liquids

• Gases

• Outer Space

Multiple Choice

Why can't sound travel through outer space?

• There is too much matter in outer space.

• There is not enough gases in outer space.

• There are too many solids in outer space

• There is no matter in outer space.

Multiple Choice

Why does sound travel best through solids?

• They are the least dense form of matter.

• They are the densest form of matter.

Multiple Choice

Through which form of matter is the second best way for sound to travel?

• Solids

• Liquids

• Gases

• Outer space

Multiple Choice

Through which form of matter is the worst way for sound to travel?

• Solids

• Liquids

• Gases

• Outer space