E. Solve the crossword. 1._______of organisms is irreversible. 2. Rust is formed when iron reacts with______ in the presence of water 3. Digestion of food is a__________change. 4.The reverse of melting. 5.Dissolving sugar in water is a________change. 6.______________expand the most on heating.plz answer
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1.Amoeba
2.oxygen
3.chemical change
4.physical change
5.gas