Tag: evs - i

Questions Related to evs - i

The most important layer of atmosphere is ___________.
evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. Troposphere

  2. Thermosphere

  3. Mesosphere

  4. None of these

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Correct Option: A
Explanation:

The layer of atmosphere near the surface of the earth or the lower-most one is called the troposphere. The average thickness of this layer is about 14 km. Most of the weather forming phenomena occur in this layer. The significance of this layer is very crucial for the earth. It is the most important layer of the atmosphere. 

When precipitation comes down to the earth in the liquid form, it is called ______.
evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. cloud

  2. rain

  3. snow

  4. ice

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Correct Option: B
Explanation:

Precipitation of liquid water particles, either in the form of drops of more than 0.5 mm diameter or in the form of smaller widely scattered drops are called rain. Rain is precipitation of water in liquid state. The drops of rain are generally larger than of drizzle. 

As we go up the layer of the atmosphere, the pressure ___________.
evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. increases

  2. decreases

  3. remains same

  4. none of these

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Correct Option: B
Explanation:

Air pressure always decreases with the increasing altitude. The decrease is caused by the compressional effect of the air above and its density. The decrease of temperature with increasing altitude in the atmosphere is called the vertical temperature gradient.

State whether these sentences are true (T) or false (F).
Carbon dioxide is an important constituents of air.

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. True

  2. False

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Correct Option: A
Explanation:

True,

Carbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. A molecule of carbon dioxide (CO2) is made up of one carbon atom and two oxygen atoms.

State whether these sentences are true (T) or false (F).
The atmosphere is composed mainly of nitrogen and oxygen.

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. True

  2. False

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Correct Option: A
Explanation:

True,

The atmosphere of Earth is composed of nitrogen (about 78%), oxygen (about 21%), argon (about 0.9%), carbon dioxide (0.04%) and other gases in trace amounts.

Which of the following gases abounds most in the composition of the atmosphere?

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. Oxygen

  2. Nitrogen

  3. Carbon-dioxide

  4. Hydrogen

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Correct Option: B

What is the percentage of oxygen in the atmosphere?

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. 78%

  2. 21%

  3. 12%

  4. 11%

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Correct Option: B
Explanation:

Atmosphere is the layer of gases surrounding the planet. The major gases present in atmosphere are nitrogen, oxygen, argon, carbon dioxide and other gases in minute quantity. The percentage of oxygen present in atmosphere is 21.

Which of the following gas is present in large quantity in atmosphere?

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. Oxygen

  2. Hydrogen

  3. Nitrogen

  4. Methane

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Correct Option: C
Explanation:

Atmosphere is the layer of gases surrounding the planet. The major gases present in atmosphere are nitrogen, oxygen, argon, carbon dioxide and other gases in minute quantity. Among all the gases present in atmosphere, nitrogen constitutes highest amount. Percentage of nitrogen present in atmosphere is 78.

The altitudes/height of heavenly bodies appears to be greater than they actually are. This is due to ____________________.

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. Vertical motion of these heavenly bodies

  2. Motions of the earth

  3. Atmospheric refraction

  4. These are visible because of light of the sun reflected from their surface

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Correct Option: C
Explanation:
Atmospheric refraction
When sunlight enters the earth's atmosphere, it continuously goes from rarer to the denser medium and hence refraction of light takes place. The refraction of light taking place in the atmosphere is known as atmospheric refraction. 

The narrow band of land, water and air where all kinds of life is possible is known as ___________.

evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

  1. Atmosphere

  2. Biosphere

  3. Lithosphere

  4. Hydrosphere

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Correct Option: B
Explanation:

The biosphere is the narrow band of land, water and air where all kinds of life on earth live. This layer ranges from heights of up to ten kilometers above sea level. It is the fourth component of the earth. Biosphere is a life-supporting global ecosystem, where each living things depends on each other and the environment. The biosphere extends over the Earth's surface in a thin layer from a few kilometres into the atmosphere, in very cold environments, to the deep-sea vents of the ocean depths and in very hot and cold environments as well.