Science book 5 2.1 + 2.2

If we see from the picture. Does it make a sound or not?

• Yes, it does.

• No, it does not.

How loud or soft the sound is

• Pitch

• Wavelength

• Acoustics

• Volume

Human's, __________ and thunder are examples of natural sources of sound

• Vehicles

• trumpets

• animals

Unpleasant sound is called ___________

• Noise

• Trumpets

• Vibration

What happens to our hearing if we listen to loud noises all the time?

• We appreciate music better

• We start to experience hearing loss

• We get a ringing in our ears

Vibration means __________ movement back and forth

• regular

• quick

• irregular

Which of these instrument make sound by plucking?

• 
• 
• 

Sound can travel through . . . .

• meeting and discussion room

• in a place that many people

• air, liquid, and solid

• vacuum chamber

Vibrations from the sources of sound travel through materials to our . . . .

• 
• 
• 
• 

Look at the picture above!

Place some beans on top of a drum. Hit the drum gently. When we hit the drum, the drum skin vibrate. This cause the beans to . . . .

• mixed up

• lost

• shut up

• jump