Question

8.What is a cyclone? Where is a cyclone formed? Name any five factors which help in the development of cyclone?

Answer 1

Explanation:

1. There are six factors responsible for the formation of the cyclone: (1) Sufficient warm temperature at sea surface (2) atmospheric instability (3) impact area of Coriolis force so that low pressure can be developed (4) high humidity in the lower to middle levels of the troposphere (5) a pre-existing low-level focus or ...
2. Wear strong shoes (not thongs) and tough clothing for protection. Lock doors; turn off power, gas, and water; take your evacuation and emergency kits. If evacuating inland (out of town), take pets and leave early to avoid heavy traffic, flooding and wind hazards.

Answer 2

Tropical cyclones form only over warm ocean waters near the equator.

• 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.

• Air from surrounding areas with higher air pressure pushes in to the low pressure area. Then this new “cool” air becomes warm and moist and rises, too. And the cycle continues…

• As the warmed, moist air rises and cools the water in the air forms clouds. The whole system of clouds and wind spins and grows, fed by the ocean’s heat and water evaporating from the ocean surface.

• As the storm system rotates faster and faster, an eye forms in the centre. It is very calm and clear in the eye, with very low air pressure. Higher pressure air from above flows down into the eye.

When the winds in the rotating storm reach 39 mph (63 kmph), the storm is called a “tropical storm”. And when the wind speeds reach 74 mph (119 kmph), the storm is officially a “tropical cyclone” or hurricane. Tropical cyclones usually weaken when they hit land, because they are no longer being “fed” by the energy from the warm ocean waters. However, they often move far inland, dumping many centimeters of rain and causing lots of wind damage before they die out completely.