How are sounds made?

Sounds are made when objects vibrate. The vibrations enter your ear and you hear them as sound. Find out more about how sound travels.

How are sounds detected?

Sound waves make the eardrum vibrate and then send messages to the brain. Find out more about how the ear detects sounds.

What is pitch?

A drum with a tight skin makes a high pitched wave. Find out more about sound waves and pitch.

What is the volume of sound?

Sounds are vibrations that travel through the air. A weak vibration doesn't travel very far. Discover more about volume.

What is light?

Light comes from different sources, like lamps, bulbs and the sun. Find out more about how light travels.

What is reflection?

When light hits an object it is reflected (bounces back) and enters our eyes. Find out about different reflective surfaces and how we see things.

How does the eye detect light?

Light bounces off some surfaces. But light travels right into your eye. Explore how your eye detects light.

22 Classroom videos

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