Unit Test: Unit 3 (Sound Energy)

What is sound?

• Sound is a type of energy made by vibrations.

• Sound is a type of energy made by sound waves.

• Sound is a type of energy made by vibrating.

• Sound is a type of energy made by music.

How can we hear the sound?

• We can hear the sound through the atmosphere.

• We can hear the sound through a vacuum.

• We can hear the sound through the space.

• We can hear the sound through the air’s vibration.

Where does sound come from?

• Sound comes from an animal.

• Sound comes from everything around us.

• Sound comes from an object.

• Sound comes from a human.

What are the things that produce sound called?

• pollution

• music

• source

• nothing

How does sound travel?

• Sound travels through a medium such as air, objects and water.

• Sound travels through a vacuum.

• Sound travels through the space.

• Sound travels through an object only.

Which is NOT a medium for sound?

• air

• water

• object

• vacuum

What makes a low-pitched sound?

• A large amplitude gives a low-pitched sound.

• A small amplitude gives a low-pitched sound.

• A low frequency wave makes a low-pitched sound.

• A high frequency wave makes a low-pitched sound.

What makes a high-pitched sound?

• A high frequency wave makes a high-pitched sound.

• A low frequency wave makes a high-pitched sound.

• A small amplitude gives a high-pitched sound.

• A large amplitude gives a high-pitched sound.

What is the unit for sound?

• kilogram (kg)

• meter (m)

• Newton (N)

• decibel (dB)

What is a pleasant sound?

• A pleasant sound is when sound is not good.

• A pleasant sound is when sound wave is smooth and regular.

• A pleasant sound is when sound wave is jagged and irregular.

• A pleasant sound is when sound is loud and disruptive.