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C. Complete the crossword puzzle with the help of the clues given. ACROSS 1. It changes during a chemical reaction. 2. Physical change is. 3. Burning of this involves both physical and chemical changes. 4. On heating all forms of matter. 5. Glowing of an electric bulb. DOWN 6. Type of changes in a growing tree. 7. Type of change during melting of wax. 8. Effect of cooling on solids. ​

Answer :

Answer:

Sure, let's complete the crossword puzzle based on the given clues:

### ACROSS:

1. **It changes during a chemical reaction.**

- Answer: **Substance**

2. **Physical change is.**

- Answer: **Reversible**

3. **Burning of this involves both physical and chemical changes.**

- Answer: **Candle**

4. **On heating all forms of matter.**

- Answer: **Expand**

5. **Glowing of an electric bulb.**

- Answer: **Light**

### DOWN:

6. **Type of changes in a growing tree.**

- Answer: **Biological**

7. **Type of change during melting of wax.**

- Answer: **Physical**

8. **Effect of cooling on solids.**

- Answer: **Contraction**

These answers should fit the typical clues for a crossword puzzle related to physical and chemical changes.

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