ICSE ICSE Class 7 - CISCE Question Bank Solutions for Geography

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.

Fill in the blank:

The layer of the atmosphere where ozone is found is called the ________.

State whether the following is true or false.

Communication satellites orbit in thermosphere.

Fill in the blank:

The ozone layer protects us from the _____________ of the sun.

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.

Write True or False.

Ozone is found in the troposphere.

Write True or False.

The ozone layer is harmful to humans and animals.

How is the atmosphere kept in place around the earth?