The air rushes along the straw and around the bend. As the straw pushes on the air to force it round the corner, the air...

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

As the water shoots out it pushes back on the carton with an equal force. Because the holes are off-centre this force makes it...

At home 5-11 11-14

Clymwch y llinyn o naill ben yr ystafell i'r llall. Nawr, tynnwch y peg i ffwrdd. Wrth i'r aer ruthro allan, mae'n gwthio'n ôl...

Adnoddau Cymraeg 5-11 11-14