Explore / Primary (ages 7–11) / Science / Reversible and irreversible changes
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- Reversible changesNew: questions are written when you open itNew
- Irreversible changesNew: questions are written when you open itNew
- BurningNew: questions are written when you open itNew
- RustingNew: questions are written when you open itNew
- Mixing that makes new materialsNew: questions are written when you open itNew
- Spotting a chemical changeNew: questions are written when you open itNew