Sound is a form of

• Energy

• Matter

• Noise

• Pressurised waves

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Sound travels through the air as waves.

• True

• False

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In space, nobody can hear you scream. Why? Select all that apply.

• Space is dark.

• Space is a vacuum.

• Space has no mass - no solids, liquids or gases.

• You can't take your helmet off to hear.

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NGSS.MS-PS4-2

Sound waves are _________ waves

• longitudinal

• transverse

• ocean

• negative

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Part of the inner ear that is a tough membrane and transmits sound from the outer ear to the inner ear

• ear drum

• cochlea

• hammer, anvil, stirrup

Select the THREE bones found in the middle ear. You may select multiple answers.

• eardrum

• hammer

• anvil

• cochlea

• stirrup

The hair cells are distributed cochlea and each section identifies a specific ______

• frequency

• electrical impulse

• rotation

Constructive interference is

• When two waves affect one another in  a positive way.
• Produce a single wave of greater amplitude (add together)
• Both

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NGSS.MS-PS4-1

What is interference?  

• occurs when two or more waves overlap and combine 
• occurs when two or more waves combine and neutralize each other 
• when one waves travels alone

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NGSS.MS-PS4-1

How loud or soft a sound is, is related to the _____________ of the wave

• amplitude
• frequency
• wave length
• rest position

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