Every question from this NCERT chapter, with a detailed explanation.
With reference to the composition of the atmosphere, consider the following statements: 1. Nitrogen is the most plentiful gas in the air. 2. Carbon dioxide and argon together make up the bulk of the atmosphere. 3. Helium and hydrogen are present in the atmosphere in lesser quantities than nitrogen. Which of the statements given above is/are correct?
Which of the following gases is primarily responsible for the "greenhouse effect" by trapping the heat radiated from the earth?
Consider the following statements regarding the circulation of air: 1. When air is heated, it contracts and becomes heavier. 2. Cold air is denser and tends to sink down. 3. Air circulation occurs when cold air from surrounding areas rushes to fill the gap left by rising hot air. Which of the statements given above is/are correct?
With reference to the nitrogen cycle in the atmosphere, consider the following statements: 1. Plants absorb nitrogen directly from the air through their leaves. 2. Bacteria living in the soil and roots of some plants change the form of nitrogen for plant use. 3. Humans absorb all the nitrogen they inhale during breathing. Which of the statements given above is/are correct?
Which one of the following best explains why the balance of carbon dioxide in the atmosphere is getting disturbed?
Consider the following statements regarding the Troposphere: 1. It is the lowest layer of the atmosphere. 2. Its average height is approximately 50 km. 3. Almost all weather phenomena like rainfall and fog occur in this layer. Which of the statements given above is/are correct?
Which of the following layers of the atmosphere provides the most ideal conditions for flying aeroplanes?
With reference to the layers of the atmosphere, consider the following statements: 1. The Mesosphere lies immediately above the Thermosphere. 2. Meteorites burn up in the Mesosphere on entering from space. 3. The Mesosphere extends up to a height of 80 km. Which of the statements given above is/are correct?
In the context of the atmosphere, the Ionosphere is a part of which of the following layers?
Which one of the following layers of the atmosphere helps in radio transmission by reflecting radio waves back to the earth?
Consider the following statements regarding the Exosphere: 1. It is the uppermost layer of the atmosphere. 2. It contains very dense air to support satellites. 3. Heavy gases like nitrogen and oxygen are concentrated in this layer. Which of the statements given above is/are correct?
Which of the following best describes the difference between weather and climate?
"Insolation" is an important factor that influences the distribution of temperature. What does it refer to?
Consider the following statements regarding temperature distribution: 1. The amount of insolation decreases from the equator towards the poles. 2. Temperature generally increases from the equator towards the poles. 3. Cities are generally warmer than villages due to the heat-trapping effect of buildings. Which of the statements given above is/are correct?
Which of the following reasons best explains why cities often have higher temperatures than villages? 1. Concrete and metals in buildings remain cool during the day. 2. Asphalt of roads releases heat during the night. 3. Crowded high-rise buildings trap warm air. Select the correct answer using the code given below:
With reference to air pressure, consider the following statements: 1. Air pressure is highest at sea level and decreases with height. 2. We feel the weight of air pressure heavily on our heads at all times. 3. In areas where temperature is high, the air creates a high-pressure area. Which of the statements given above is/are correct?
Which of the following conditions is typically associated with a "low-pressure" area?
Consider the following statements regarding the movement of air: 1. Air always moves from high pressure areas to low pressure areas. 2. The movement of air is known as humidity. 3. Cold air is heavy and sinks, creating a high pressure area. Which of the statements given above is/are correct?
The "Loo" is a hot and dry wind that blows during the day in summers. In which region is it predominantly found?
With reference to "Permanent Winds", consider the following statements: 1. They blow only during specific months of the year. 2. Westerlies and Easterlies are examples of permanent winds. 3. They are also known as planetary winds. Which of the statements given above is/are correct?
Which instrument is primarily employed to measure atmospheric pressure?
Consider the following statements about humidity: 1. Moisture in the air at any time is known as humidity. 2. As air gets warmer, its capacity to hold water vapour decreases. 3. On a humid day, clothes dry very quickly. Which of the statements given above is/are correct?
Which one of the following phenomena explains the white trail left behind by jet planes flying in the sky?
In the context of the atmosphere, what happens to the temperature in the Thermosphere as height increases?
Consider the following statements regarding the ozone layer: 1. It is found in the Stratosphere. 2. It allows harmful ultraviolet rays to reach the earth. 3. Its depletion is caused by chemicals like chlorofluorocarbons (CFCs). Which of the statements given above is/are correct?
Why do astronauts have to wear special protective space suits filled with air when they go to the moon?
Which of the following is the standard unit of measurement for temperature?
Consider the following statements about the "Monsoon": 1. It is a permanent wind that blows from the sea to the land. 2. It is a seasonal wind that changes its direction in different seasons. 3. It is derived from the Arabic word 'mausim'. Which of the statements given above is/are correct?
Which of the following is the correct sequence of atmospheric layers starting from the earth's surface?
What is the primary reason for the formation of a "high pressure" area?
Which of the following statements is correct regarding the relationship between temperature and air pressure?
Consider the following statements regarding the composition of air: 1. Nitrogen is the most plentiful gas in the air. 2. Green plants consume oxygen during photosynthesis. 3. Humans and animals release carbon dioxide which is used by green plants. Which of the statements given above is/are correct?
Consider the following statements regarding the impact of cutting trees on hillsides: 1. It helps in the preservation of ground water. 2. It causes rainwater to flow down bare mountains. 3. It can lead to flooding of low-lying areas. Which of the statements given above is/are correct?
Which of the following is NOT a permanent wind?
Which of the following statements is correct regarding the presence of dust particles in the atmosphere?
Which of the following statements best describes the "Trade Winds"?
Consider the following statements regarding the "Mesosphere": 1. It is the third layer of the atmosphere. 2. It lies immediately above the Thermosphere. 3. It extends up to a height of 400 km. Which of the statements given above is/are correct?
Which atmospheric gas is utilized by green plants during the process of photosynthesis?
Which of the following effects is likely to occur due to the rise in temperature caused by global warming? 1. Melting of snow in the coldest parts of the world. 2. It leads to a decrease in sea levels. 3. Extinction of some plants and animals in the long run. Select the correct answer using the code given below:
Consider the following statements about the "Stratosphere": 1. It extends up to a height of 10 km. 2. It contains a layer of ozone gas. 3. Temperature rises rapidly with height in this layer. Which of the statements given above is/are correct?
Which of the following is the most likely reason for the "wet weather" associated with low pressure areas?
Which of the following statements is correct regarding the "Exosphere"?
Consider the following statements about "Wind": 1. A wind is named after the direction towards which it blows. 2. A wind blowing from the west is called an easterly. 3. Strong winds are generally harmless and cannot uproot trees. Which of the statements given above is/are correct?
Which of the following correctly describes the "Ionosphere"?
Which of the following is a characteristic of "High Pressure" areas?
Consider the following statements regarding "Condensation": 1. It occurs when water vapour rises and starts cooling. 2. It leads to the formation of water vapour from ice. 3. Clouds are masses of water droplets formed by condensation. Which of the statements given above is/are correct?
Which of the following pairs is correctly matched? 1. Thermometer : Measures temperature 2. Barometer : Measures rainfall 3. Rain Gauge : Measures atmospheric pressure Select the correct answer using the code given below:
What is the primary reason for the decrease in insolation from the equator towards the poles?
Consider the following statements about "Air": 1. It is a single element rather than a mixture. 2. It presses us from all directions. 3. It is denser at sea level than at higher altitudes. Which of the statements given above is/are correct?
Which of the following is a consequence of the air becoming warmer?
Which of the following statements about "Nitrogen" is correct? 1. It is the most plentiful gas in the air. 2. Plants take nitrogen directly from the air. 3. It is toxic to plants and hinders their survival. Select the correct answer using the code given below:
Consider the following statements regarding the "Thermosphere": 1. It lies above the Mesosphere. 2. It blocks radio waves from travelling. 3. Temperature rises very rapidly with increasing height in this layer. Which of the statements given above is/are correct?
Which of the following statements is correct regarding the "Troposphere"?
What happens to the air pressure as we go up the layers of the atmosphere?
Consider the following statements about "Carbon Dioxide": 1. It is an important gas for green plants. 2. The amount released by humans is negligible compared to plant usage. 3. Burning of coal and oil helps maintain this balance. Which of the statements given above is/are correct?
Which of the following statements correctly defines the term 'Wind'?
Which of the following statements about the "Ozone Layer" is correct?
Consider the following statements regarding "Insolation": 1. It is the incoming solar energy intercepted by the earth. 2. Its amount is the same everywhere on the earth. 3. It influences the distribution of temperature. Which of the statements given above is/are correct?
Which of the following pairs of atmospheric layers and their features is correctly matched? 1. Troposphere : Weather phenomena 2. Stratosphere : Ozone layer 3. Mesosphere : Meteorites burn up Select the correct answer using the code given below:
Which of the following best describes the "Water Vapour" in the atmosphere?
Consider the following statements regarding "Rainfall": 1. It is harmful to the survival of plants and animals. 2. It brings fresh water to the earth's surface. 3. Lack of rainfall can lead to droughts. Which of the statements given above is/are correct?
With reference to the "Atmosphere", consider the following statements: 1. It is a huge blanket of air surrounding the earth. 2. It allows all solar radiation to reach the surface. 3. Without it, the earth would remain frozen during the day. Which of the statements given above is/are correct?
Which of the following pairs of winds are correctly matched with their type? 1. Trade Winds : Permanent winds 2. Monsoon : Local winds 3. Loo : Seasonal winds Select the correct answer using the code given below:
Which of the following are the three types of rainfall classified on the basis of mechanism?