Composition and Structure of the Atmosphere — Geography STD 7 — Question

Why do we need to conserve our energy resources?

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.

Africa rainforests are one of the densest forests on earth. A large number of trees grow in a relatively small area because the region receives a lot of rain and sunshine, both important for the growth of plants. Humans being also fourish when they get the right conditions.
Can you enlist a few factors that affect the growth of human beings?
What factors adversely affect the growth of people in an area?

Describe the three-tier forest of the equatorial region.

Electricity is very important for all of us. We need it for our homes, offices, industries, and agriculture.
Make a list of five different ways in which you can save electricity, for instance, switching off fans, ACs, light at home, and in school when these things are not required.

In your notebook, draw neat, labelled, coloured sketches of the three different types of rainfall. Alongside each diagram, briefly describe in your own words, how each type of rainfall occurs.

In your atlas, locate the major and minor rivers flowing through Europe. Note the names of important cities/towns that have developed on the banks of these rivers. Then tabulate your observations in your notebook using the headings given here :

1. Name of the river
2. Countries through which it flows
3. Important town/cities situated on its banks.

Collect information and pictures of the krill. Stick the pictures in your scrapbook and write the information alongside.

What is meant by the terms ‘soil erosion’ and ‘soil conservation’?

On an outline map of Australia, neatly mark and label the following:
 

1. the capital cities of the states
2. The narrow stretch of water that separates Tasmania from Australia
3. The longest perennial river of Australia
4. The ocean that lies west of Australia
5. A ridge-like feature made up of coral
6. write SHEEP FARMING in an appropriate place on the map where it is practiced.