Advertisements
Advertisements
प्रश्न
How is our atmosphere different from the atmospheres on Venus and Mars?
उत्तर
Earth’s atmosphere is different from those of Venus and Mars. This difference lies essentially in their compositions. Earth’s atmosphere is a mixture of nitrogen (79%), oxygen (20%), and a small fraction of carbon dioxide, water vapours and other gases. This makes the existence of life possible on Earth. However, the atmospheres on Venus and Mars mainly consist of carbon dioxide. The amount of carbon dioxide on these planets can range from 95% to 97%.
APPEARS IN
संबंधित प्रश्न
You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
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.
State whether the following is true or false.
The earth’s atmosphere contains 99 per cent oxygen, which is essential for life.
Fill in the blank:
The layer of the atmosphere where ozone is found is called the ________.
Write briefly about the layers of the atmosphere
What is ozone? What is the ozone layer? How is the presence of ozone layer essential to preserve life on earth?
Explain the significance of the earth’s atmosphere.
Mountaineers carry oxygen in cylinders when they climb mountains that are more than 5000 m high. What could be the reason for that?
A ______ shows the direction in which the air is moving at a particular place.
The atmosphere of the earth is heated by radiations which are mainly
