The Alka-Seltzer fizzes when in water, releasing gas. This gas builds up in the canister until the pressure is too great and...

At home 5-11 11-14

After about 20 mins the juice and the water will have swapped places because water is less dense than sugary fruit juice.

At home 5-11 11-14

The glass pushes inwards on the Malteser, forcing it to move in a circle rather than a straight line. But the angle of the...

At home 5-11 11-14

As the air rushes out it pushes back on the balloon propelling it forward.

At home 5-11 11-14

Edrychwch! Mae'n acros yn llawn aer! Wrth i'r balŵn ymestyn, gwthiodd aerr o'r botel. Mae'r gwasgedd aer yn y botel yn is na'r...

Adnoddau Cymraeg 5-11 11-14

All the beads should “flow” out of the container without help. When they’re moving fast they should even jump higher than the...

At home 5-11 11-14

As the been swinger moves through the air, the rubber band starts to vibrate. The card amplifies the sound so that you can...

At home 5-11 11-14

The petals help the bubble to become big by holding the soapy water in the petals so the bubble doesn't stretch too thin and...

At home 5-11 11-14

When you blow directly into the bag, the only air flowing into the bag is from your lungs. When you blow from a short distance...

At home 5-11 11-14

Air resistance means that when dropped separately, the book and paper hit the ground at different times. But when they are...

At home 5-11 11-14

A vortex of air is pushed out of the bottle by the balloon, ruffling everything it passes. How far will the vortex travel?

At home 5-11 11-14

The two identical bottles vibrate at the same natural frequency. So when one vibrates and produces a note, this makes the...

At home 5-11 11-14