http://www.sciencekidsathome.com/science_topics/hot_air.html#more
kids science information on how temperature changes air pressure
http://www.bnsc.gov.uk/assets/BNSC_worksheet2005c.pdf
Air is all around us, wherever we are. A huge layer of air surrounds the Earth. This is called the atmosphere. We use air from the atmosphere for lots of things – including breathing!






