Science Revision

Sound is a type of .........

Answer explanation

Sound is a type of energy that is made by vibration.

The movement of an object back and forth is called .......

How does sound travel?

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Answer explanation

When an object vibrates, it causes particles to start vibrating. Particles vibrate and pump into each other. Sound travel because vibrations travel.

Sound travel best through .......

Amie and Jane are testing if sound travels through a balloon, Amie puts her lips against the balloon while Jane holds the balloon with both hands while putting her ear against the balloon. How did Jane know when Amie made a sound?

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Answer explanation

Jane was able to hear a sound. She was also able to feel the vibration caused of the sound caused by Amie

Minh had a glass jar, he covered the top with a plastic wrap and put some rice on top to test what is gonna happen. He tapped the jar and the rice moved, why?

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Answer explanation

When he tapped the jar, the vibrations travelled through the jar to the plastic wrap causing the rice to also vibrate and move.

Mike and Ben were testing sound through a tube, they had a clock and they held it near their ears, then moved it away and tried to listen again. Then finally they used a tube to listen. They said the sound was louder using the tube, do you agree and why?

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Answer explanation

When you put a sound source near a tube, you force the air particles inside closer to each other. The air particles inside the tube cannot spread out, so they keep bumping into each other and vibrating. The more they vibrate, the louder the sound gets.

Tapping sound vibrations makes the sound ............

What is sound volume?

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Answer explanation

It is how loud or soft the sound is

The sound measuring unit is .....

• Kilogram

• Centimeter

• Decibels

• Dozen