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.
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1) Penguins have to keep high body temperatures to remain active. They have thick skin and lots of fat (blubber) under their skin to keep warm in cold weather. They also huddle together with their friends to keep warm. Penguins tightly packed feathers overlap to provide waterproofing and warmth.
2) The sea has a greater heat capacity than land, so the surface of the sea warms up more slowly than the land's.The air above the sea has a relatively higher pressure, causing air near the coast to flow towards the lower pressure over 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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