Clean air 2

This week we discussed what a fuel is, what carbon dioxide is, how we test for it and then how carbon dioxide contributes to global warming.

We lit and blew out candles.
I put a beaker over a lit candle – and then got a round of applause when it went out! We had to do this several times.
I lit other examples of fuels to show they work the same way as a candle – paper and charcoal
We all blew into limewater and watched what happened – again, it was like we had done magic!

Clean air (2) powerpoint


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