๐ฌ Science ยท Matter & Materials
Irreversible Changes
Explain that some changes result in the formation of new materials and are not usually reversible, such as burning, rusting, and reactions with acid
Typical age: 9โ11 years
โCan your child explain why you can't un-burn a piece of toast or turn rust back into shiny iron, because a completely new material has been made?โ
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