Grade 7 REVISION: UNIT 11- 12

Sound waves can be shown on an oscilloscope. What happens to the loudness of the sound between X and Y?

• Increases

• Decreases

• Stays the same

What happens to the amplitude of the sound between X and Y?

• Increases

• Decreases

• Stays the same

What happens to the pitch of the sound between X and Y?

• Increases

• Decreases

• Stays the same

What happens to the frequency of the sound between X and Y?

• Increases

• Decreases

• Stays the same

Mia investigates shadows. She puts a piece of card between a flashlight and a screen. A shadow forms on the screen. Which answer shows the size of the shadow?

• A to B

• A to C

• A to E

• B to D

Blessy does an experiment with light. She uses a single incident light ray and a curved glass block. What is happening to the ray of light as it goes from the air into the glass block?

The bigger the vibrations of the air particles the quieter the sound.

• True

• False

Sound waves can move through air, water and a vacuum.

• True

• False

When there is no sound the particles stop moving.

• True

• False

A high pitched sound is always loud.

• True

• False