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प्रश्न
_______ can be seen moving in a beam of sunlight in a dark room.
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उत्तर
Dust particles can be seen moving in a beam of sunlight in a dark room.
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संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
Briefly state the importance of Oxygen.
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
What happens if the percentage of oxygen in the air reaches to 70%?
What are the components of air?
List uses of oxygen.
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
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 |
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
