Question

Q.2 Give reasons for the following statements.

1. Penguins can easily live in the polar regions. (2)

2. The winds flow from the sea towards the land in summer. (2)

3. Place a crumpled piece of paper on the mouth of an empty bottle and it comes outside

when you blow air inside the bottle.​

Answer 1

Answer:

1. Penguins have webbed feet for powerful swimming. Their bodies are streamlined to reduce drag in water. Penguins have to keep high body temperatures to remain active. They have thick skin and lots of fat under their skin to keep warm in cold weather.
2. Over the water, high surface pressure will form because of the colder air. To compensate, the air will sink over the ocean. The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The air over the ocean is now warmer than the air over the land.
3. When we blow into the mouth of the bottle, the air near the mouth has higher speed. This decreases the pressure there. The air pressure inside the bottle is higher than near the mouth.

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