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प्रश्न
How are corals formed?
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उत्तर
Corals are a hard substance composed of a skeleton of tiny marine creatures called coral polyps. When corals die their hard skeletons remain fixed in place. Since these polyps live in colonies when they die their large accumulation of skeletons forms coral reefs which are circular or ridge-like.
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संबंधित प्रश्न
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 :
- Name of the river
- Countries through which it flows
- Important town/cities situated on its banks.
The Scandinavian coutnries are generally considered to have a separate cultural identity. Form groups in your class and search the Internet to gather information on these countries and then hold a discussion under the following points.
- employment
- education
- law and order
- care for the aged
Why did Africa remain unexplored for a long time?
Discuss the importance of ocean currents and winds for the climate of Europe.
Write true or false. Correct the false statement.
Wild cats and large fur-bearing animals are not found anywhere in Europe.
Identify who I am:
I am the longest river in Africa
Identify who I am:
I am a lake that does not lie in the Great Rift Valley of Africa
On a blank outline map of Africa
(a) Mark with brown lines the Atlas and the Drakensberg Mountains.
(b) Shade with yellow and label the Sahara Desert and the Kalahari Desert.
(c) Shade with light brown the plateau region of Africa, the Ethiopian and Adamawa Highlands.
(d) Colour with blue and label neatly all the surrounding water bodies, oceans, seas, bays, gulfs, and straits.
Discuss how the location of Africa has affected the climate of the country.
Identify the hot deserts of Africa and briefly describe the climatic conditions in terms of temperature and rainfall.
