Question

Which of the following statements is/are correct?

• A. If wind flows from land to the ocean, then it is daytime.
• B. A very high pressure system, with very high speed wind surrounding it forms a cyclone.
• C. The coast line of India is not vulnerable to cyclones.
• D. Warm air is lighter than cool air.

Answer 1

The correct option is D Warm air is lighter than cool air.

When the wind blows from land to the ocean, it is called land breeze. It occurs during night, because at night, the water cools down slower than the land. So, the cool wind from the land moves towards the ocean.

A very low-pressure system, with very high-speed winds revolving around it, form a cyclone.

The whole coastline of India is vulnerable to cyclones. Cyclones hitting the east coast are stronger.

On heating, the air expands and occupies more space. When the same quantity occupies more space, then it becomes lighter. So, warm air is lighter than cool air.