Question

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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Answer 1

Required Answer:-

1. Penguins can easily live in the polar regions.

Yes, this statement is true.

Penguins can live in polar regions easily because they have adaptation to live in extreme cold climate.

• They have a broad padded feet which helps them to walk on ice easily.
• They have a think layer of skin which protects them from extremely cold climate.
• They also huddle together with their friends to keep warm.
• Penguins tightly packed feathers overlap to provide waterproofing and warmth.

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

Yes, this statement is also true.

• A sea breeze describes a wind that blows from the ocean inland towards land.

• This breeze occurs most often in the spring and summer months because of the greater temperature differences between the ocean and nearby land, particularly in the afternoon when the land is at maximum heating from the sun.

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.

This statement is also true.

• The air pressure at the mouth of the bottle is reduced due to more speed.
• This forces the air out from the bottle. This prevents the crumpled paper ball to move inside.

• Moving air exerts pressure, when the air blows we can see the fluttering of leaves in the tree, banners and flags.