Climate and soil (class --vi)
1. why does it become cooler as we move away from the equator?
Ans- It becomes cooler as we move away from the equator because:-* Sun rays are slanting which spread over a large land area than vertical Ray's .
* These pass through a thick layer of the atmosphere which absorbs a large part of their heat.
2. What is the role of water in soil formation ?
Ans :- Rain water enters the crevices of rocks. In winter ,this water freezes and expands. This causes the rocks to crack and form smaller rocks which further breakdown to form even smaller pieces. Finally ,they get converted into very fine particles and mix with humus to form soil.
3 . How do trees help in making and conserving the soil ?
Ans- Roots of trees can penetrate to great depth for absorption of water and minerals. They push their way across the rocks in the Earth's crust and exert lot of pressure on the rocks. Thus, cracks are formed in the rocks and cause weathering.Also , Roots helps in conserving the soil by binding the soil particles.
4 . How do polar animals conserve their body heat ?
Ans :- The following features help polar bears conserve their body heat.
- Body is conserved with dense for that traps air to keep them warm.
- Layer of fat under the skin provides excellent insulation.
6. Name four agents of weathering of rocks.
Ans :- *Rain
* Wind
* Temperature
* Minerals
7. What is weather forecast? How is it helpful to navigators , farmers and fisherman ?
Ans :- weather forecast is a prediction on likely weather conditions valid for the next 24 hours or a few days. A forecast of prevailing weather conditions is important for farmers as they depend on natural rains for irrigation. It is possible to predict the possibility of famine or heavy rains, and this information is of great use to people like navigators,tourists and fisherman.
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