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प्रश्न
When is World Environment Day Celebrated?
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उत्तर
World Environment Day is celebrated on 5th June every year.
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संबंधित प्रश्न
When water is heated, we see bubbles rising up. Why?
We often leave the lights switched on and fans running when we are not in the room. We switch on the air-conditioning even though we don’t really need it. We insist on being dropped to school in the car every day. Thus, we waste valuable energy which is generally produced by burning coal and petroleum. As you know, the burning of these fuels release gases that pollute the atmosphere.
Make a list of the similar things that we do without realizing that we are destroying the environment. Think of the ways that we can behave differently.
Fill in the blank
______ per cent of the atmosphere is made of nitrogen.
Choose the correct answer.
The rate at which the temperature drops in the troposphere is called
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?
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.
What is the difference between the troposphere and the tropopause?
Explain the significance of the earth’s atmosphere.
How is ozone important for us?
Answer the following question briefly:
Name the different layers of atmosphere.
Mountaineers carry oxygen in cylinders when they climb mountains that are more than 5000 m high. What could be the reason for that?
What are clouds made of?
Write the significance of the following gases.
Oxygen __________________
Carbon dioxide __________________
Ozone __________________
Name the atmospheric layers.
Why is Troposphere called as weather making layer?
Why mountain climbers carry oxygen while climbing?
A ______ shows the direction in which the air is moving at a particular place.
The ozone layer protects all life on earth from the harmful ______ rays of the sun.
Exosphere has a high temperature.
Analogy:
Weather changes: Troposphere.
Ozone layer: ______.
