Geography Ch - 4 Air Social Studies - Geography Ch - 4 Air

High pressure area is associated with which of the following?

Which of the following layers is the outermost in the atmosphere?

Which one of the following layers is the theatre of all the weather phenomena?

Which one of the following gases is used as fire extinguishers?

The picture given below shows the layers of atmosphere.

Which of the following layers of atmosphere protect us from harmful effect of the Sun rays?

Assertion (A) Global warming is primarily caused by an increase in the level of carbon dioxide in the atmosphere due to human activities.
Reason (R) Lower levels of carbon dioxide act as a greenhouse gas, trapping heat and leading to rising temperatures on Earth.

Assertion (A) The atmosphere is divided into five layers, including the troposphere and stratosphere.
Reason (R) The troposphere is where most weather phenomena occur, while the stratosphere contains a layer of ozone gas.

Cyclonic rainfall occurs when warm and cold air masses meet and form a 'front.'

Convectional rainfall occurs when moist air is lifted over a mountain, leading to the formation of rain clouds.

Climate refers to the hour-to-hour, day-to-day condition of the atmosphere.

The stratosphere is the layer of the atmosphere where all weather phenomena occur.

The atmosphere primarily consists of nitrogen, oxygen and carbon dioxide.

The standard unit of measuring temperature is __________ .

The uppermost layer of the atmosphere is known as __________ .

One important feature of stratosphere is that it contains a layer of __________ .

Carbon dioxide in atmosphere creates a __________ effect by trapping the heat radiated from the Earth.

What is meant by insolation?

What is meant by greenhouse effect?

How does an increase in atmospheric carbon dioxide lead to global warming?

How do plants obtain nitrogen from the atmosphere?

What caused the devastating supercyclone in Odisha in 1999?

For ten days note down weather report from a local newspaper and observe the changes occurring in the weather.

What are the causes due to which temperature in cities rises? Explain any two.

Explain the factors that affect weather and climate.

Explain about the process of insolation.

Why stratosphere is the ideal layer for flying aeroplanes?

Green plants use carbon dioxide to make their food and release oxygen. Humans or animals release carbon dioxide. The amount of carbon dioxide released by humans or animals seems to be equal to the amount used by the plants which make a perfect balance. However, the balance is upset by burning of fuels, such as coal and oil. They add billions of tons of carbon dioxide into the atmosphere each year. As a result, the increased volume of carbon dioxide is affecting the Earth's weather and climate.
(i) What disrupts the balance between carbon dioxide production and absorption in the atmosphere?
(ii) How does the increased volume of carbon dioxide In the atmosphere impact the Earth's weather and climate?

Discuss humidity and its relation to the formation of clouds and precipitation.

In what way nature balance our lives? How this balance would be disturbed?

Explain wind and its movement between high and low-pressure areas.

What causes low-pressure areas and which type of weather is associated with them?

The air pressure is highest at sea level and decreases with height. Describe air pressure.

Explain the structure of atmosphere.

Rohan was observing the winds blow during the afternoon while he was returning from school. He thought about the different types of winds that blow in a year. Explain the types of winds.

Moisture in the air at any time is known as humidity. Discuss moisture and precipitation.

Differentiate between weather and temperature.

Read the passage given below and answer the following questions.
Air pressure is defined as the pressure exerted by the weight of air on the Earth's surface. As we go up the layers of atmosphere, the pressure falls rapidly. The air pressure is highest at sea level and decreases with height. Horizontally the distribution of air pressure is influenced by temperature of air at a given place. In areas where temperature is high, the air gets heated and rises. This creates a low-pressure area. Low pressure is associated with cloudy skies and wet weather. In areas having lower temperature, the air is cold. It is therefore heavy. Heavy air sinks and creates a high pressure area. High pressure is associated with clear and sunny skies. The air always moves from high pressure areas to low pressure areas.
(i) Which of the following factor influences the horizontal distribution of air pressure, as mentioned in the passage?
(a) Altitude changes
(b) Atmospheric layers
(c) Temperature variations
(d) Wind patterns
(ii) How is formation of a low-pressure area related to the temperature of the air in a given location?
(a) High temperatures leads to low pressure
(b) Low temperatures create low pressure
(c) High temperatures result in high pressure
(d) Low temperatures cause high pressure
(iii) In which atmospheric layer does air pressure fall rapidly with increasing height?
(a) Stratosphere
(b) Troposphere
(c) Mesosphere
(d) Thermosphere
(iv) What weather condition is associated with a low-pressure area, according to the passage?
(a) Stormy weather
(b) Clear and sunny skies
(c) Overcast conditions
(d) Intense precipitation