Chemistry, Changes around us
Storyboard Description
reversable and irrevarsable changes
Storyboard Text
- Oh no!We had to use this iron for costruction, but it has started to rust
- And it is an irrevesible change.
- This shovel is very handy for soil digging, we need more of them. Do you know how it is made?
- Yes, I do. The iron blade is fixed to the wooden handle by the proccess of expansion on heating , it is a reversible change
- Uh oh!No electricity, we'll have to manage with candles
- Do you know, melting of wax is reversible change and burning of wax is an irreversible change.
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