Question

Fill in the blanks.

1. Plants take _________ to prepare their food.
2. We breathe in______ and release carbon dioxide.
3. Earth has almost 70% of _______.
4. When we heat water, it changes into _______ .

Hint-
Oxygen,carbon dioxide,water,water vapour​

Answer 1

• Carbon dioxide
• Oxygen
• Water
• Water vapour

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Answer 2

a) Carbon dioxide

b) Oxygen

c) Nitrogen

d) water vapours