5. Write 3 examples of physical and chemical changes through the application of heat.
Physical Change
1._______________________
2._______________________
3._______________________
Chemical Change
1._______________________
2._______________________
3._______________________
Physical Change
1._______________________
2._______________________
3._______________________
Chemical Change
1._______________________
2._______________________
3._______________________
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Answer:
Physical Change
1.cutting paper
2.melting butter
3.dissolving salt in water, and breaking glass.
Chemical Change
1.Burning, cooking
2.Cooking
3.Rusting and Rottinf
Rusting of iron in presence of moisture and oxygen.
Burning of wood.
Milk becoming curd.
Formation of caramel from sugar by heating.
Baking of cookies and cakes.
Cooking any food.
Acid-base reaction.
Digestion of food.
Crushing a can.
Melting an ice cube.
Boiling water.
Mixing sand and water.
Breaking a glass.
Dissolving sugar and water.
Shredding paper.
Chopping wood.