Module 5.3 - Exploring Sound

The government (政府) does not take part in controlling (控制) noise (噪音) pollution (污染).

• True

• False

Noise (噪音) pollution (污染) can have harmful (有害) effects on health and well-being.

• True

• False

Sound cannot travel through a vacuum (真空).

• True

• False

Earmuffs can protect (保護) hearing in noisy (嘈雜) environments (環境).

• True

• False

Sound is produced by the ____ of objects.

• vibration

• rotation

• expansion

• contraction

Long exposure (曝露) to loud noise(噪音) can lead to ________ loss(喪失).

• hearing (聽力)

• vision (視力)

• taste (味覺)

• smell (嗅覺)

Sound (聲音) can be transmitted (傳播) through...

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How does sound travel?

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How fast does sound travel in the three states of matter?

Order them from fastest to slowest

.

Fastest ------------------ Slowest

• gases (氣體)

• solids (固體)

• liquids (液體)

What materials can absorb (吸收) sound and reduce (減少) echoes (回音)?

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