What is sound?

What is sound?

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How does sound travel?

• by vibration

• by air

• it starts with the mechanical movement of the molecules

• by the space

What is vacuum?

• is the space

• is a chamber with molecules and particles

• is a space where there is no molecules,no matter , no vibration

• is a space where there is no sound

Which three elements do we need in order to have sound?

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What is the higher frequency that the human ear is able to detect?

• 20 Hz

• 20,000 Hz

• 2,000 Hz

• 200 Hz

What is frequency?

• is a unit to measure the sound

• the waves in the sound

• the particles traveling through the three stages of matter

• is the matter

What is matter?

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How is the loudness of sound measure?

• by vibration

• by volume

• by a higher pitch

• by waves

Does sound travel in Vaccum?

• yes

• no

Choose the best definition for infrasound

• any sound with a frequency below of 20 Hz

• any sound with a frequency above of 20 Hz

• any sound with a frequency above of 20,000 Hz