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प्रश्न
What is global warming?
उत्तर
The increased greenhouse effect is caused due to increase in air pollutants and it results in the average increase in temperature of the atmosphere. This is called Global warming.
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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 observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
How is air useful to water boats?
Fill in the blank
Polluted air is harmful to ____.
What will happen if the number of vehicles and factories in your surroundings increases?
Water does not have a ______ but has definite ______ and ______.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
What is wind energy?
Wind does not help in the movement of which of the following?
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement
The ______ makes the windmill rotate.
