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प्रश्न
What is greenhouse effect?
उत्तर
The trapping of solar heat energy in earth’s atmosphere is called greenhouse effect.
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संबंधित प्रश्न
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Give two uses of the following component present in air:
water vapour
How is air useful to windmills?
Name two air pollutants which cause global warming.
Why is it said that-
Air is a homogeneous mixture of various gases.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
The composition of air is always exactly the same.
The layer of air around the earth is known as ______.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement
Air is a ______ of some gases.
