Long Answer Questions:
(a) What is air pressure? (b) Why does a dosed tin can containing boiling water get crushed, when
kept under a cold water tap?
(a) What is a cyclone? (b) Describe the formation of a cyclone.
3. What are summer monsoons? How are summer monsoons caused over India? How are they
useful?
HOTS (Higher Order Thinking Skills) Questions:
Neeta read the following news in the morning assembly, “A cyclone that started in the deserts of
Rajasthan hits Chandigarh today". Is this news correct? Why/Why not?
2. Why a cyclone cannot be observed on the land?
Answers
Explanation:
a)The pressure exerted by air on all bodies at all times in all directions is called air pressure. When air moves at high speeds, it creates a low pressure area. The air inside a balloon exerts pressure in all directions, and makes it blow up.
b) When the hot can is plunged into cold water, the vapor condenses quickly, leaving a vacuum in most of the can. The resulting large discrepancy between the outside and inside air pressure leads to a large net inward force on the can, ending with its rapid crushing.
a) Cyclone is a large scale air mass that rotates around strong centers of low pressure. Water vapors are formed when water is heated. This heat is released to atmosphere when water vapors convert to water during rains. The heat released, warms the air around and makes it to move up. This is called a Cyclone.
b) To form a cyclone, warm, moist air over the ocean rises upward from near the surface. As this air moves up and away from the ocean surface, it leaves is less air near the surface. So basically as the warm air rises, it causes an area of lower air pressure below. ... Higher pressure air from above flows down into the eye.
3:Monsoons always blow from cold to warm regions. The summer monsoon and the winter monsoon determine the climate for most of India and Southeast Asia. The summer monsoon is associated with heavy rainfall. ... The summer monsoon brings a humid climate and torrential rainfall to these areas.
2:Cyclones can be observed on land, but they cannot originate on land. This is because they need the moisture from the sea in order to form the huge clouds. Cyclones are formed when warm air meets cool air, The less dense warm air rises over dense cool air.
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