Advertisements
Advertisements
प्रश्न
How is greenhouse effect produced?
उत्तर
The solar heat radiations consist of very short wavelength infrared radiations. These radiations can easily pass through the atmosphere. These radiations are absorbed by the Earth’s surface and temperature of the Earth rises during the daytime. At night, the Earth radiates out heat radiations of very long wavelength which cannot easily penetrate through the atmosphere because carbon-dioxide and clouds act as excellent reflectors. Thus, heat radiations are trapped in the atmosphere which keep the Earth warm during night. This trapping of outgoing solar heat energy in Earth’s atmosphere is greenhouse effect.
APPEARS IN
संबंधित प्रश्न
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Give two uses of the following component present in air:
water vapour
Define rusting?
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
Water does not have a ______ but has definite ______ and ______.
State the meaning of the term Atmosphere.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
Mention two uses of air.
Make sentences using the given set of words.
Air, wind, motion, called
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
