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प्रश्न
Demonstrate the formation of convective currents.
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उत्तर
Convection currents are set up in the air. To demonstrate their formation, let us consider the following experiment:
Place a candle in a beaker and light it. Now, light an incense stick and bring it to the edge of the mouth of the beaker. Observe the direction of flow of smoke. Now, in a similar way, observe the direction of flow of smoke by placing the stick a little above the candle and then at other regions above the beaker.
You will observe that the direction of flow of smoke is different in all the situations. The patterns of flow of smoke reveal the directions in which hot and cold air move.
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संबंधित प्रश्न
How is our atmosphere different from the atmospheres on Venus and Mars?
Match the following.
| A | B | ||
| 1. | Troposphere | (i) | Ozone |
| 2. | Stratosphere | (ii) | Ions |
| 3. | Thermosphere | (iii) | Outer Space |
| 4. | Exosphere | (iv) | Lowest Temperature |
| 5. | Mesosphere | (v) | Densest Layer of atmosphere |
State whether the following is true or false.
The stratosphere extends from the top of the troposphere up to 80 km above the surface of the earth.
Choose the correct option.
The ozone layer is found between _______ km above the earth’s surface.
In your notebooks, draw a diagram showing the layers of the atmosphere. Mark clearly the ozone layer, the height at which a jet plane can fly and also the height up to which birds can fly.
The atmosphere is divided into ___________ layers.
Give Reason:
Exosphere is characterised by aurora Australis and aurora borealis.
The air envelope is thicker near the earth’s surface and we go higher the density and availability of air gradually decreases. Why?
The two forms of oxygen found in the atmosphere are
Choose the correct sequences
