Major Domains of the Earth - 3

How many continents are there on the earth? Name them. Select the first statement from the audio clip.

• These continents are – Asia, Europe, Africa, North America, South America, Australia and Antarctica.

• There are seven major continents separated by large water bodies.

How many continents are there on the earth? Name them. Select the second statement from the audio clip.

• These continents are – Asia, Europe, Africa, North America, South America, Australia and Antarctica.

• There are seven major continents separated by large water bodies.

Write is the main reason of air pollution. Select the first statement of the audio clip.

• Carbon dioxide (CO₂) is an important constituent of air but increase in the amount of CO₂ leads to global warming.

• Emission from industries, thermal power plants and vehicles, pollutes the air.

Write is the main reason of air pollution. Select the second statement of the audio clip.

• Carbon dioxide (CO₂) is an important constituent of air but increase in the amount of CO₂ leads to global warming.

• Emission from industries, thermal power plants and vehicles, pollutes the air.

What is ‘Atmosphere’? Why atmosphere is so important?

Select the first statement of the audio clip.

• The earth is surrounded by a layer of gas called the atmosphere.

• This thin blanket of air is an integral and important aspect of the planet.

• It provides us with the air we breathe and protects us from the harmful effects of sun’s rays.

What is ‘Atmosphere’? Why atmosphere is so important?

Select the second statement of the audio clip.

• The earth is surrounded by a layer of gas called the atmosphere.

• This thin blanket of air is an integral and important aspect of the planet.

• It provides us with the air we breathe and protects us from the harmful effects of sun’s rays.

What is ‘Atmosphere’? Why atmosphere is so important?

Select the third statement of the audio clip.

• The earth is surrounded by a layer of gas called the atmosphere.

• This thin blanket of air is an integral and important aspect of the planet.

• It provides us with the air we breathe and protects us from the harmful effects of sun’s rays.

Why do mountaineers carry oxygen cylinders with them? Select the second statement of the audio clip.

• That’s why they carry oxygen cylinders with them to be able to breathe at high altitudes.

• The climbers experience problems in breathing as density of air decreases rapidly as we go up.

Write a short note on the continent – Antarctica. Select the first statement of the audio clip.

• Antarctica, completely in the Southern Hemisphere, is a huge continent

• The South Pole lies almost at the centre of this continent.

• As it is located in the South Polar Region, it is permanently covered with thick ice sheets.

• There are no permanent human settlements. Many countries have research stations in Antarctica.

Write a short note on the continent – Antarctica. Select the second statement of the audio clip.

• Antarctica, completely in the Southern Hemisphere, is a huge continent

• The South Pole lies almost at the centre of this continent.

• As it is located in the South Polar Region, it is permanently covered with thick ice sheets.

• There are no permanent human settlements. Many countries have research stations in Antarctica.