Advertisements
Advertisements
प्रश्न
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
उत्तर
A blanket of air around earth is called the atmosphere. Without an atmosphere, life would not be possible, as the atmosphere protects us from harmful gases. We could not live without the air present in the atmosphere. In the absence of the atmosphere, the earth would get so cold at night that we would not be able to survive. No \[\ce{CO2}\] and \[\ce{N2}\] for plants without atmosphere.
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 |
Discuss harmful effects of greenhouse effect.
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
Describe a simple experiment with the help of a diagram to show that Air occupies space
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
How is light scattered by the air?
State the meaning of the term atmosphere.
Name a device which uses wind energy to generate electricity.
Mention two uses of air.
