Geography

2. The sphere of air that envelopes the earth.
6. it is a variety of life on earth comprising of plants, animals and micro-organisms.
7. The uppermost part of the lithosphere which is rich in silica and aluminium.
9. of wildlife. It does not allow any human activity.
10. seasonal reversal of the wind direction according to the change in season.
13. The only planet in our solar system where life exists.
14. a gradual increase in the overall temperature of the earth's atmosphere.
15. the term that stands for the topmost layer of the earth comprising of loose material.
18. the wearing away of the earth’s surface by weathering process and agents of gradation.
20. Mass of water on the earth’s surface.
21. river channels separating from the main river.
22. amount of water vapours in the atmosphere.
23. a geographical area meant for the conservation of biodiversity. Limited human activities are permitted.

1. a scientist who studies geology(study of earth)
3. sweeping curves of a river.
4. very small organismes.
5. plants absorb carbon dioxide in the presence of sunlight and turn that energy into food.
7. a wave of energy generated by an earthquake or other earth vibrations that travel within the earth or along its surface.
8. a well demarcated reserved area for the
11. vast expense of saline water on the eaths's surface.
12. A situation or condition in which an organism lives.
16. a solid inorganic substance of natural occurrence.
17. a natural process in which rainy water dissolves minerals from the soil and carry them away.
19. small streams joining the main river.