Sounds

Sounds are made when things or . . . .

• music vibrate

• word vibrate

• hand vibrate

• air vibrate

Examples of objects that can produce sounds, are picture . . . .

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Look at the picture above!

When we sing or talk, the part of the body that vibrates is the designated number . . . .

• two

• four

• three

• one

Consider the statements below!

1. Sounds are made when things or air vibrate.

2. Plucking, hitting, blowing, and shaking are same ways to make things vibrate and produce sounds.

3. The sound is produced by a stationary object.

4. The vocal cards in our voice-box vibrate and make sounds when we talk or sing.

The statement above does not indicate how sound is produced . . . .

• three

• two

• one

• four

One example of a tool that we can make to send and receive messages. shown picture . . . .

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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 . . . .

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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

When we hit the drum harder, the beans jump higher and the sounds is . . .

• soft

• hide

• not heard

• louder

Examples of sounds that sound soft are . . . .

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