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प्रश्न
Whales come up to the water surface to breathe in oxygen.
पर्याय
True
False
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उत्तर
Whales come up to the water surface to breathe in oxygen- True.
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संबंधित प्रश्न
Name three noble gases present in the air. State their one industrial use
Give two examples of modern fuels.
Give a reason why nitrogen is filled in food packets and not oxygen.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
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Compare respiration and combustion-both involving oxygen of the air.
Classify the following.
( Dog, Cat, coconut tree, monkey, brinjal plant, papaya plant)
| Things which give out oxygen | Things which give out carbon dioxide |
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- Nitrogen
- carbon-di-oxide
- Noble gases
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How will you prove that air supports burning?
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Match the following:
| 1. | More industrial cities | a. | dust particles |
| 2. | Coastal areas | b. | Humidity |
| 3. | Rainy season | c. | Carbon dioxide |
| 4. | Windy places | d. | water vapour |
