Question

when a vehicle like a train' move very fast _____ is created temporarily behind it low pressure high pressure eye or cyclone ​

Answer 1

Answer:

is this fill in the blanks

Explanation:

if yes the answer is 'it'

Answer 2

Fill the missing word in the blank spaces in the following statements:

(a) Wind is ___________air.

(b) Winds are generated due to _________ heating on the earth.

(c) Near the earth’s surface _________ air rises up whereas _________ air comes down.

(d) Air moves from a region _________of pressure to a region _________of pressure.

Answer

(a) moving (b) uneven

(c) warm, cooler (d) high, low

Question 2

Suggest two methods to find out wind direction at a given place.

Answer

(i) Take a piece of a paper in your hand. Allow it to fall from your hand. It will flow in the direction in which wind is blowing.

(ii) You can also use a wind-pane which helps us to know accurate wind direction.

Question 3

State two experiences that made you think that air exerts pressure.

Answer:

(i) Balloons and balls can be used only when they are inflated with air. When balloon is overfilled with air it bursts due to excessive air pressure.

(ii) Compressed air is used in the brake system for stopping train