L’aire és necessari per:

-Respirar-Combustions-Transmetre sons-Desplaçar-se

http://www.google.es/url?sa=i&rct=j&q=persona+respirando&source=images&cd=&cad=rja&docid=_MLMXJGj85VTqM&tbnid=5Zg4PO_zKcsanM:&ved=0CAUQjRw&url=http%3A%2F%2Fluisandresfigueroa.blogspot.com%2F2011%2F02%2Fcuando-fue-la-ultima-vez-que-te.html&ei=pW0SUd3EI8PR0QX9xIGABQ&psig=AFQjCNGAC5tFhTALqhLLkX_IknkFbuRuog&ust=1360248592644778

http://www.google.es/url?sa=i&rct=j&q=peixos&source=images&cd=&cad=rja&docid=eG1_FOnwQgitgM&tbnid=hFdxCQacThS81M:&ved=0CAUQjRw&url=http%3A%2F%2Fblocs.xtec.cat%2Feifalset%2Fp4%2F&ei=6m0SUdDYHYml0AXd4YHwBw&psig=AFQjCNFZz7jVCRf1zBySENla6r01-4bCnA&ust=1360248652527311

http://www.google.es/url?sa=i&rct=j&q=foc&source=images&cd=&cad=rja&docid=G5kb5Sur3hL0xM&tbnid=oRz8cxe4x26MuM:&ved=0CAUQjRw&url=http%3A%2F%2Ffinestrajove.wordpress.com%2Ftag%2Ffoc%2F&ei=QW4SUfn9NNSX0QXAh4CoCg&psig=AFQjCNGDv9NX6NPDcuk2hwZ3DGcOrAE8fQ&ust=1360248761533091

http://www.google.es/url?sa=i&rct=j&q=transmissi%C3%B3+so&source=images&cd=&cad=rja&docid=S9_9jk9CsFtISM&tbnid=ZLMB4rwy9NUstM:&ved=0CAUQjRw&url=http%3A%2F%2Fphobos.xtec.cat%2Fcdec%2Findex.php%3Foption%3Dcom_content%26view%3Darticle%26id%3D72%26Itemid%3D40&ei=v24SUZLsHaTC0QXfpICQBw&psig=AFQjCNEXdsYS3sVIBaRXFtZQ3Db5g1OqMg&ust=1360248866038204

http://www.google.es/url?sa=i&rct=j&q=ocells+volant&source=images&cd=&cad=rja&docid=ee-DJs84PgsK-M&tbnid=qe_qFA-1cmE_LM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.xtec.cat%2Fceipsantmarc%2Focells%2FAguila%2520Daurada%2Fgaleria%2520d'imatge.htm&ei=vG8SUf4aiaDRBbXKgLgD&psig=AFQjCNGYoEAoRVNlczOlfuh4Hw8IHDMX4w&ust=1360249112714839

1. Podem cremar una fusta sense aire?

2. Sense aire, els animals podrien viure?

3. I nosaltres? 4. Els avions i helicòpters podrien

volar sense aire?

Algú té alguna pregunta?