ICSE ICSE Class 7 - CISCE Question Bank Solutions

Form a group in your class and obtain a topo sheet from the Geography Department of your school. Look at it carefully and identify the following features :

1. settlements
2. railway lines
3. agricultural fields
4. roads

Match the following:

Column A	Column B
1. Camping Ground	(i)
2. Seasonal streams	(ii)
3. Palms	(iii)
4. River	(iv)
5. Footpath	(v)

Discuss the importance of the different layers of the atmosphere?

What would happen to the earth if the atmosphere disappeared?

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.

Fill in the blank
The rate at which the temperature drops in the ____________ is 1°C per 165 metres.

Fill in the blank
The _________________ is the layer of the atmosphere that help in radio transmission.

The upper part of the thermosphere is called the ______.

Match the following.

Choose the correct answer.
This per cent of the atmosphere is composed of nitrogen.

Choose the correct answer.
21 per cent of the atmosphere is composed of

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

Choose the correct answer.
This layer of the atmosphere has the lowest temperature.

Collect rainfall data from the website of the Indian Meteorological Department (IMD) for Mumbai, Chennai, Delhi, and Kolkata and discuss how rainfall patterns have changed in the last 5 years.

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 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.

State whether the following is true or false.
The temperature drops at the rate of 1°C per 185 metres in the atmosphere.