Tag: the earth and its living world

Quizzes (28) Questions (100)

Questions Related to the earth and its living world

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Carbosphere comprises

  1. Atmosphere

  2. Lithosphere

  3. Hydrosphere

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. The layer of gases that surround the planet Earth, constitute the Atmosphere. 
B. Lithosphere is the outer rigid part of earth that comprises of crust and upper mantle.
C. Hydrosphere is the liquid component of earth i.e. the total water on the earth collectively constitutes the Hydrosphere.
Carbosphere or Carbon atmosphere comprises atmosphere, lithosphere and hydrosphere i.e. all components.
So, the correct answer is 'All of the above'.
Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Weather represents

  1. Short term properties of atmosphere

  2. Seasonal changes in atmosphere

  3. Average variations of atmosphere conditions

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Weather is the state of the atmosphere which can change on a daily basis. It describes the degree to which it is hot or cold , humid or dry, calm or stormy etc. therefore, it cannot be the seasonal change in the atmosphere as that would mean changing of seasons. It cannot be average variation of atmospheric conditions as that would be climate change. It cannot be all of the above because two options indicate season and climate. So the correct answer is 'Short term properties of atmosphere.'

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Atmospheric content of $CO _2$ is

  1. $0.0036\%$
  2. $0.036\%$
  3. $0.36\%$
  4. $3.6\%$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon dioxide is a colourless gas with a density of about 60% higher than that of dry air. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas. The current concentration is about 0.04% (410 ppm) by volume, having risen from pre-industrial levels of 280 ppm. Carbon dioxide is odourless at normally encountered concentrations. However, at high concentrations, it has a sharp and acidic odour.

So the correct answer is '0.036%'.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ingredients of atmosphere present in minute quantities but essential for maintaining life on earth are

  1. Ozone and oxygen
  2. Ozone and CO$ _2$

  3. Carbon dioxide and water

  4. Carbon dioxide, ozone and water vapours
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Life is not possible without a stable atmosphere containing the right chemical ingredients for living organisms: hydrogen, oxygen, nitrogen, and carbon. These ingredients must be balanced. Therefore we need carbon dioxide, ozone as well as water vapours. These are present in minute quantities but are essential for life. So the correct answer is ' Carbon dioxide, ozone and water vapours'.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ozone makes the stratosphere

  1. Cooler by $17^0$ C
  2. Warmer by $17^0$ C
  3. Warmer by $51^0$ C
  4. Cooler by $51^0$ C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The absorption of ultraviolet radiation by ozone molecules in the stratosphere releases heat, which causes the temperature in the stratosphere to increase with altitude, making it warmer than it would be otherwise.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Khsiti, a basic resource of earth represents

  1. Air

  2. Energy

  3. Soil

  4. Water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The resources can be divided into 5 types based on the resources of earth. These are Tej, Marut, Ap, Khsiti and Vyom. Tej is a basic resource from sun. Marut is basic resource from wind. Ap is basic resource from water. Khsiti is basic resource of earth. It represents air. Vyom is the basic resource of explorating space.

Thus, the correct answer is 'Air.; 

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

In mesosphere, the temperature

  1. Rises from - $2^0$ to $15^0$ C
  2. Rises from - $2^0$ to $92^0$ C
  3. Decreases from - $2^0$ to - $15^0$ C
  4. Decreases from - $2^0$ to - $92^0$ C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Temperatures in the mesosphere decrease with altitude. Because there are few gas molecules in the mesosphere to absorb the Sun’s radiation, the heat source is the stratosphere below. The mesosphere is extremely cold, especially at its top, about -90 degree Celsius.  So the correct answer is ' it decreases from -2 to -92 degrees. '

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ozone present in stratosphere filters out

  1. UV - A

  2. UV - B

  3. UV - C

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The UV-A radiations are scattered and reach the surface of the earth continually. These are the least harmful radiations. The UV-B and UV-C are the most harmful radiations are capable of burning the human skin within 15 minutes of the exposure. These are absorbed by the ozone layer in the stratosphere. The ozone depletion results in the exposure of the earth surface to the UV-B and UV-C causing immunity problems, skin cancers, chlorophyll bleaching etc.

Hence, the correct answer is 'Both B and C'.