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प्रश्न
We need to understand that global warming, climate change, acid rain, and ozone depletion are all happening because of our dependence on fossil fuels and CFC-based technologies. Therefore, the need of the hour is to reduce our dependence on them.
What can you do in this regard?
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उत्तर
The ways to reduce our dependency on them are :
- By using materials such as bamboo, recycled metal, and organic paints in the construction of buildings.
- By using solar energy to heat and light homes and offices.
- By using clean fuel like CNG and unleaded petrol to run vehicles.
- By making changes in everyday practices such as
(a) choosing to travel in public vehicles, biking, walking, or using a carpool.
(b) buying energy-efficient household appliances.
(c) replacing light bulbs with CFL bulbs.
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संबंधित प्रश्न
Set up an experiment to measure gain and loss of heat by water, sand and air.
Fill in the blank
The _________________ is the layer of the atmosphere that help in radio transmission.
Choose the correct answer.
This per cent of the atmosphere is composed of nitrogen.
Choose the correct answer.
This gas protects us from the harmful ultraviolet radiation.
Choose the correct answer.
The rate at which the temperature drops in the troposphere is called
State whether the following is true or false.
The earth’s atmosphere contains 99 per cent oxygen, which is essential for life.
State whether the following is true or false.
The stratosphere is the lowest layer of the atmosphere.
Write True or False.
CFCs and BFCs protect the ozone layer.
What is the troposphere?
How is the presence of the ozone layer essential to preserve life on earth?
This is a picture of a supersonic aircraft.
This layer of the atmosphere is also known to protect living beings from the harmful rays of the sun. How?
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.
Tick the correct answer:
The major constituent of atmosphere by percent is ____________
State whether the following sentence is true (T) or false (F).
The atmosphere is composed mainly of nitrogen and oxygen.
Very Short Answer Type Question:
What is the nature of the temperature?
World Meteorological Day.
Wind movements cause the clouds particles to collide is _______.
Match the following.
| 1. | Troposphere | Satellite |
| 2. | Stratosphere | Space craft |
| 3. | Exosphere | Ozone layer |
| 4. | Thermosphere | Meteors |
| 5. | Mesosphere | Weather change |
Why is atmosphere essential for life on earth?
Why is Heterosphere called so?
