Question

D. Very Short Answer Questions:
1. Name the gas that supports burning.
2. Which gas is used by plants to prepare food?
3. Which gas in the atmosphere is necessary for respiration?
4. Name the component(s) of air present in variable amount.
5. Why is smoke harmful for us?
6. How do underground animals get oxygen?​

Answer 1

2. Carbon dioxide

3. Oxygen

Answer 2

Answer:

1. oxygen
2. carbon dioxide
3. oxygen
4. water vapor and dust partials
5. Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis.
6. oxygen