MCQ
Warm air is $.........$ than cold air.
- AHeavier.
- ✓Lighter.
- CNo difference in weight.
- DVery much lighter.
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| Column I | Column II |
| 1. Oxygen | (A) Releases energy from food |
| 2. Glucose | (B) By-product of photosynthesis |
| 3. Sunlight | (C) Taken in during photosynthesis |
| 4. Carbon dioxide | (D) Stored as starch in plants |
| 5. Respiration | (E) Source of energy for photosynthesis |