78 Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and airplanes.

True

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False

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Solution

The correct option is B False
Only the wind powders sail yachts, and they can easily be with the wind at their backs. The wind pushes the sail forward by inflating it and applying pressure to it.
Air also helps in the movements of aeroplanes. Birds and insects also fly in the presence of insects.
Thus, Air helps in the movements of sailing yachts and gliders as well as in the flight of birds and aeroplanes.
Final answer: The given statement is false.

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Similar questions

Question 9.3

State whether the following statements are true or false. If false, correct them.

Air helps in the movements of sailing yachts and glider but plays no role in the flight of birds and aeroplanes.

Quesion 2

Wind does not help in the movement of which of the following?

a) Firki

b) Weather cock

c) Ceiling fan

d) Sailing yacht

Question 3

What is not true about air?

a) It makes the windmill rotate.

b) It helps in the movements of airplanes.

c) Birds can fly due to the presence of air.

d) It has no role in the water cycle.

State whether the following statements are true or false. If false, correct them.

(a) Plants consume oxygen for respiration.

(b) Plants produce oxygen during the process of making their own food.

(d) Air does not occupy any space.

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