Practise and challenge your friends! Download the Water bottle Rockets PDF(378 Kb). Adobe Acrobat is required. SAFETY: This rocket uses air pressure to fling a bottle at high speed 20–50 metres. The ...

Natural cork, plastic or screwcap - do wine enclosures matter ... These millions of acres of cork oak trees pull carbon from the air and pump out oxygen. Hundreds of farm communities have tended ...

Instead carefully drive the pump's needle through the cork so you can add air. You will probably get even wetter using this technique. As you pump, you can see air bubbling into the bottle.