Tag: evs - i

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Questions Related to evs - i

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

If there were no atmosphere around the earth, the temperature of the earth will ________.

  1. Increase

  2. Go on decreasing

  3. Increase during day and decrease during night

  4. Be unaffected
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If there were no atmosphere around the earth, the temperature of the earth will increase during day and decrease during night. In the absence of atmosphere around the earth, it will be like a moon. There would be no life, no winds, no rains, no fires, no protection against harmful solar radiations. Due to absence of atmosphere around the moon, the temperature ranges from -190$^0$C to 110$^0$C. Air is a bad conductor of heat. The atmosphere has an average temperature of the earth almost steady during the day and night. It prevents sudden increase in temperature during the day time. Also, it decreases the rate of escape of heat during night time.

Thus, the correct answer is 'Increase during day and decrease during night.'

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

Which gas of the atmosphere holds up ultraviolet rays?

  1. $O _2$
  2. $O _3$
  3. $N _2$
  4. $CO _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The maximum concentration of ozone gas (O$ _{3}$) is present in the stratosphere region of the earth’s atmosphere. Ozone gas forms a layer in the stratosphere which absorbs the most harmful UV rays also known as UV-C and UV-B. Exposure in UV rays can cause skin cancer, plant tissue damage and other dreadful illness. In the past few years, the ozone layer is depleting rapidly due to excessive use of aerosols, chlorofluorocarbons and other kinds of pollutants. Montreal Protocol in 1987 was signed to control the amount of ozone-depleting substances
So, the correct answer is 'O$ _{3}$'
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 layer was discovered by

  1. Coriolis

  2. Fabry

  3. Wiener

  4. Diener
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ozone layer was discovered by Charles Fabry and Henri Buisson in 1913. The depletion of ozone was discovered by Farman, Gardiner and Shanklin in 1985.

A. Coriolis discovered the effect of the rotation of the earth on the direction of winds.
B. Fabry discovered the ozone layer along with Buisson.
C. Weiner discovered the Rh blood group in Rhesus monkeys.
Hence, the correct answer is 'Fabry'.

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

The protective ozone shield is to be found in the _____________.

  1. Hydrosphere

  2. Ionosphere

  3. Stratosphere

  4. Troposphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ozone layer resides within the stratosphere, specifically in the lower portion of it between roughly 15 and 35 kilometers above Earth's surface. It plays a critical role in absorbing harmful ultraviolet radiation from the sun.

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.;