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प्रश्न
What is a streamlined body? How does it help in the movement of animals that fly or swim in water?
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उत्तर
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A streamlined body is one which is pointed at the ends and broad in the middle. When such a body travels through a fluid or gaseous medium it exhibits minimum friction or resistance. A body shape which is streamlined helps cut against the friction created by the medium around the moving body.
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Streamlined body lowers the friction drag between a fluid, air, or water and an object moving trough that fluid. Drag is a force that slows down motion. Streamlining reduces the surface area of the moving object.
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Streamlining reduces the friction of movement to a minimum thus decreasing overall drag. Fishes can save energy while swimming because of the streamlined body.
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संबंधित प्रश्न
Very Short Answer Type Question:
Name a bird which can swim in water.
Very Short Answer Type Question:
How is a bird’s body adapted for flying?
Short Answer Type Question:
How does the snail move?
Match the items in Column I with one or more items of Column II.
| Column I | Column II |
| Upper jaw | have fins on the body |
| Fish | has an outer skeleton |
| Ribs | can fly in the air |
| Snail | is an immovable joint |
| Cockroach | protect the heart |
| shows very slow movement | |
| have a streamlined body |
The body of the cockroach is covered with an exoskeleton made of ______.
The Atlas/Axis joint is an example of ______ joint.
How does the fish change direction?
Name the types of movements seen in animals.
Given below is a list of different types of movements in animals.
[Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping]
Human beings
Unscramble the jumbled word and write it in the blank space provided.
tnemevom ................
