Atmospheric Pressure and Variation

Q.

A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements.

[Air, oxygen, wind, water vapor, mixture, combination, direction, road, bottles, cylinders]

A weathercock shows the _______ in which the air is moving at that place.

Q. Which instrument is used to measure Earth's atmospheric pressure?

1. Anemometer
2. Pressure meter
3. Barometer
4. Micrometer

Q. ______ is a device to measure the speed of the wind.

1. Barometer
2. Micrometer
3. Wind vane
4. Anemometer

Q.

The questions which follow consist of two statements labeled ‘A’ and ‘R’. Examine each statement carefully and decide if assertion ‘A’ and ‘R’ are individually correct. If so, then decide, whether reason ‘R’ is correct explanation of ‘A’. Select your answer using the codes given below.

Statement	Code
(i) Both ‘A’ and ‘R’ are correct and ‘R’ is the correct explanation of ‘A’	(a)
(ii) Both ‘A’ and ‘R’ are correct but ‘R’ is not correct explanation of ‘A’	(b)
(iii) ‘A’ is correct, but ‘R’ is incorrect	(c)
(iv) ‘A’ is incorrect, but ‘R’ is correct	(d)

A: An ink pen when filled with ink on a high mountain starts leaking.

R: The air pressure on the high mountain is less than that in the plains.

Q. In the context of atmospheric pressure, which of the following can be the result of an increase in altitude?

1. There is no direct relation between altitude and atmospheric pressure
2. Gradual increase of pressure and then decrease with increasing altitude
3. An increase in air pressure
4. A decrease in air pressure

Q.

At a given place the barometric pressure rises suddenly. The weather forecast is:

1. dry weather

2. rain

3. anticyclonic weather with strong winds

4. fair weather

Q. Which of the following statements is/are correct?

1. A high- pressure region is formed over a place experiencing high temperature.
2. Air moves from a high-pressure region to a low-pressure region.
3. A low-pressure region is formed over a place experiencing low temperature.
4. Atmospheric pressure decreases with increase in altitude.

Q. Which of the following statements is/are correct regarding atmospheric pressure?

1. The average atmospheric pressure at the sea level is around 1, 013.2 millibars.
2. Atmospheric pressure is uniform across the globe.
3. Atmospheric pressure is measured with the help of an instrument called a barometer.
4. Atmospheric pressure doesn't have any role in case of weather phenomenon.