Tag: what is around us?

Questions Related to what is around us?

Through the process of photosynthesis plants absorb ___ from the atmosphere and release ___ into it.

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

  1. Carbon dioxide, oxygen

  2. Exhaustible

  3. Non-renewable

  4. Natural

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Correct Option: A
Explanation:
Carbon dioxide, oxygen.
Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. This glucose can be converted into pyruvate which releases adenosine triphosphate (ATP) by cellular respiration. Oxygen is also formed.

Photosynthesis may be summarised by the word equation:

carbon dioxide + water arrow with sunlight and chlorophyll glucose + oxygen
The conversion of usable sunlight energy into chemical energy is associated with the action of the green pigment chlorophyll.

The layer present between stratosphere and thermosphere is _______________.

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

  1. Ionosphere

  2. Mesosphere

  3. Troposphere

  4. None of these

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Correct Option: B
Explanation:

The layer present between stratosphere and thermosphere is mesosphere. Height of mesosphere layer is 80-85 kms. It is the layer present between stratosphere and thermosphere. In the mesosphere, temperature decreases as the altitude increases. The upper boundary of the mesosphere is the mesopause, which is the coldest naturally occurring place on Earth.

The thermosphere begins at a height of _____________.

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

  1. 80 Km

  2. 95 Km

  3. 105 Km

  4. 120 Km

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Correct Option: A
Explanation:

The thermosphere begins at about 80 km (50 mi) above sea level. At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass (see turbosphere).

The height of mesosphere extends from ____________.

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

  1. 70 to 80 km

  2. 110 to 130 km

  3. 80 to 85 km

  4. 95 to 105 km

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Correct Option: C
Explanation:

Height of mesosphere layer is 80-85 kms. It is the layer present between stratosphere and thermosphere. In the mesosphere, temperature decreases as the altitude increases. The upper boundary of the mesosphere is the mesopause, which is the coldest naturally occurring place on Earth.

Which of the following statements is true:

A.The troposphere is thinner at the poles 

B.The troposphere is thicker at the poles 

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

  1. Only A

  2. Only B

  3. Both A and B

  4. None of these

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Correct Option: A
Explanation:

Among the given options only A is true because troposphere is thinner at the poles. The height of the troposphere varies from place to place and from season to season. The height of the troposphere at the pole is about 8 Km while at the equator it is about 16 Km.

The atmospheric layer that supports life is _________.

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

  1. Stratosphere

  2. Mesosphere

  3. Troposphere

  4. Ionosphere

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Correct Option: C
Explanation:

The atmospheric layer that supports life is called troposphere. It is the lowest layer of earth’s atmosphere. The troposphere starts at Earth's surface and goes up to a height of 7 Km to 16 km. Almost all weather phenomenon occur in this layer.  

Aeroplanes fly in which of the following layers of atmosphere?

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

  1. Mesosphere

  2. Stratosphere

  3. Troposphere

  4. Exosphere

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Correct Option: B
Explanation:

Commercial jet aircraft fly in the lower stratosphere to avoid the turbulence which is common in the troposphere below. The stratosphere is very dry; air there contains little water vapor. Because of this, few clouds are found in this layer; almost all clouds occur in the lower, more humid troposphere.

The stratosphere and mesosphere together are sometimes referred to as _______________.

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

  1. Inner atmosphere

  2. Middle atmosphere

  3. Outer atmosphere

  4. None of these

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Correct Option: B
Explanation:

  • The stratosphere and mesosphere together are sometimes referred to as middle atmosphere.
  • The layer present between stratosphere and thermosphere is mesosphere. Height of mesosphere layer is 80-85 kms. In the mesosphere, temperature decreases as the altitude increases. The upper boundary of the mesosphere is the mesopause, which is the coldest naturally occurring place on Earth.
  • Ozonosphere is also called as stratosphere which consists of ozone gases that prevents UV rays from entering the earth’s surface.

Thermosphere consists of ____________.

geography 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. Ionosphere

  3. Lithosphere

  4. Hydrosphere

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Correct Option: B
Explanation:

The layer of earth above mesosphere is thermosphere. It consists of ions due to ultra violet radiations causing photo ionization and hence forms ionosphere.  The temperature in this zone increases with increase in altitude.

The region of Earth's upper atmosphere that extends from about 60 km (37 mi) to 1,000 km (620 mi) altitude is called __________.

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

  1. Stratosphere

  2. Troposphere

  3. Ionosphere

  4. None of these

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Correct Option: C
Explanation:

Ionosphere lies beyond the ozonosphere at height of about 60 km above the earth's surface. In this layer temperature again starts rising with altitude. Here density of air is very low and the gases present is very small.  At this level ionization of atmosphere begins to occur by the impact of cosmic rays. Radio waves transmitted from the earth are reflected back to the earth from this layer.