Question

B. State whether the following are physical or chemical changes.
1. Burning of sugar
2. Passing electric current through a heater's rod.
3. Cutting wood into small pieces
4. Digestion of food
5 Melting of wax
6. Dissolving sugar in water.
7. Shaping a piece of glass.
8. Growing of piglet into pig
C. A burning candle is an example of both physical and chemical changes. Explain.
D. Name the following
1. A change that is useful to us.
2. The process in which substance mix with another to form homogeneous mixture
3. A change in which a new substance is formed
4. A final substance of a chemical reaction
5. Initial substance of a chemical reaction.
6. A change that takes place on its own.​

Answer 1

Answer:

B.1 . chemical change

2.chemical change

3.physical change

4.chemical change

5.physical change

6.physical change

7.chemical change

8.chemical change

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