Student's Book - Page 90 - 2

Student’s Book - Page 90 - 2

Listen again and number the photos

Sound is a form of energy. Sound with lots of energy is loud. Like this. Sound with a little energy is shhhh. Quiet. Like this. Movements in the air carry the energy. We call these vibrations. When these movements or vibrations are fast, we hear a high note. When they are slow, you hear a low note.

1) When the stick is lower. Nearer the drum, you can’t hit the drum with very much energy. That makes the sound quieter. Which photo is it?

2) When the stick is higher, you can hit the drum harder. With more energy, that makes the sound louder. Which photo is it?

3) When the rubber band is longer, it is tighter. When it is tighter, it moves or vibrates. faster. Faster vibrations make a higher note. Which photo is it?

4) When the rubber band is shorter. It is looser. When it is loose, it moves or vibrates more slowly. Slower vibrations make a lower note. Which photo is it?

This is the end of CD 3.