Rachna Sapra solutions for Geography [English] Class 9 ICSE chapter 13 - Atmospheric Pressure and Winds [Latest edition]

Statement (X): The air pressure decreases with increasing latitude.

Statement (Y): The air pressure has an inverse relationship with temperature if the two places are located at the same latitude.

The lines joining places having the same atmospheric pressure are called ______.

The velocity of winds depends upon ______.

Coriolis force is an outcome of ______.

Coriolis force is maximum at ______.

Due to Coriolis effect, the winds deflect towards ______ in the northern hemisphere.

Which region of the world is called the Doldrums?

Which region of the world is called ‘Horse latitudes’?

Ferrel cell exists between ______.

During summers in the northern hemisphere, the pressure belt shifts ______.

Which of the following wind types belongs to the primary wind circulation?

Roaring forties is the name given to ______ winds.

Katabatic winds refer to the ______.

Monsoon winds are experienced only in the ______ region.

Mistral is a local wind which blows in ______.

Statement (X): Rising air forms an area of high pressure.

Statement (Y): Sinking air forms an area of low pressure.

Match the two columns correctly.

Match the two columns correctly.

Assertion (A): A sea-facing flat in Mumbai has some clothes hung on a clothesline in the balcony. The clothes will be blown towards the sea during the afternoon.

Reason (R): The sea breeze blows during the day.

Assertion (A): The smoke always rises.

Reason (R): Smoke is lighter than air.

Assertion (A): The equatorial region always experiences low pressure belt.

Reason (R): The equatorial region always experiences direct rays of the sun.

Assertion (A): The pressure belts are not fixed.

Reason (R): The pressure belts move southward in the summer season.

Assertion (A): The Coriolis effect deflect the winds to the right hand side in the northern hemisphere.

Reason (R): The Coriolis effect takes place due to the rotation of the Earth.

Read the picture carefully and answer the following questions.

1. Name the winds blowing between 0° to 30° N.
2. Name the degree of latitudes between which the Northwesterly winds blow.
3. Name the winds blowing in the North polar region.

Read the picture carefully and answer the following questions.

1. Which of the two persons is experiencing lower atmospheric pressure?
2. Will he face a problem in breathing?
3. If yes, what should he do to ensure comfortable breathing for himself?

Name the four major pressure belts of the world.

Mention in which ways the anticyclones affect the weather conditions.

Between which latitudes and in which hemisphere, the winds are called “Roaring Forties”?

State the Ferrel’s Law.

Name the instrument used to measure atmospheric pressure.

Name the latitudes which are called Doldrums.

Mention the characteristics of Doldrums.

Why do the Monsoon winds come in the category of seasonal winds?

What is the Inter-Tropical Convergence Zone?

Give three differences between Cyclones and Anticyclones.

What do you mean by Coriolis Force?

How does this force vary from lower to higher latitudes?

Define the term ‘Atmospheric Pressure’.

To which category of winds ‘Chinook and Foehn winds’ belong? Why?

Name the cold wind that prevails over the northwest of the Mediterranean Sea.

Define the term Isobars.

Define the term Front.

Why are Trade winds so called?

What are the Jet Streams? 

Name the two types of Jet Streams.

What is the meaning of the term ‘pressure gradient’?

What is the reason for the equable/maritime climate in the coastal area?

How do the land and sea breezes make the coastal climate less extreme?

Explain briefly the factors that affect Atmospheric Pressure.

There is a strong similarity between Monsoon winds and land and sea breeze. Explain that similarity.

Give a reason why the westerlies in the southern hemisphere blow with a greater force than those in the northern hemisphere.

Give the effects of tropical cyclones on life and property in the coastal area.

Name the two types of variable winds.

Name the two types of cyclones.

Name an area where typhoons are experienced.

What does the term eye of a storm mean?

Name the weather conditions associated with the cyclones.

What are the Roaring Forties?

What are Furious Fifties?

Why are the Roaring Forties called that?

Why are the Furious Fifties called that?

Name the Planetary Winds.

What is the other term used for the Planetary winds?

Where do Blizzards blow?

What are Mango showers?

Differentiate between Katabatic and Anabatic winds.

Name two hot local winds.

Bring out three differences between the Trade winds and the Westerly winds.

Give two examples of tertiary winds.

How does the atmospheric pressure get affected by a change in altitude?

Moist air exerts less pressure than dry air. Why?

What causes the winds to blow?

Define the term Polar cell.

Define the term Ferrel Cell.

Define the term Hadley Cell.

What causes the seasonal shifting of pressure belts?

What is the unit of measuring atmospheric pressure?

Ira visited Ladakh during summer vacation. She experienced nose bleeding as soon as she got down from the plane. Can you guess the reason for it?

We feel discomfort in our ears at the time of take-off of a flight. This happens due to the fact that the atmospheric pressure decreases with increasing altitude. Keeping this concept in mind, explain the reason for the discomfort in the ears.

Which of the following places is most likely to experience tropical cyclones?

Goa, Ahmedabad, Bhubaneshwar, Kochi

Give a reason for your answer.