Tag: introduction to natural resources

Questions Related to introduction to natural resources

The first life had appeared about 

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

  1. 4.8 billion years ago

  2. 3.8 billion years ago

  3. 1.4 billion years ago

  4. 2 billion years ago

Show answer
Correct Option: B
Explanation:

About 3.8 billion years ago after the formation of earth, single celled prokaryotic cells (bacteria) appeared. It is supposed that the multicellular living organisms evolved from them. So, the correct option is B.

Ozone layer occurs in.

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

  1. Ionosphere

  2. Stratosphere

  3. Thermosphere

  4. Troposphere

Show answer
Correct Option: B
Explanation:

The Ozone layer is located in the stratosphere in a region that is 10 to 50 km above the Earth.

So, the correct option is 'Stratosphere'.

Transitional layer between stratosphere and mesosphere is ______________.

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

  1. Troposphere

  2. Lithosphere

  3. Stratopause

  4. Tropopause

Show answer
Correct Option: C

Earth is protected from ultra-violet radiations by means of.

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

  1. Ozone layer

  2. Nitrogen

  3. Oxygen

  4. Carbon dioxide

Show answer
Correct Option: A
Explanation:

The ozone layer filters out most of the sun's harmful ultraviolet radiation and is thereby significant for the life on Earth.

So, the correct option is 'Ozone layer'.

Thickness of ozone in column of air from ground to top of atmosphere is measured in terms of

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

  1. Decibel units

  2. Pascal units

  3. Svedberg units

  4. Dobson units

  5. Angstrom units

Show answer
Correct Option: D
Explanation:
A. Decibel (dB) is the unit to measure the intensity of sound.
B. Pascal (Pa) is the unit measure pressure.
C. Svedberg (S) is a non-metric unit used to express the sedimentation coefficient of particles. 
D. Dobson unit (DU) is used to measure the thickness of earth's atmosphere.
E. Angstrom (Å) is a unit of length used to express the size of atoms, molecules etc.
Hence, thickness of ozone in column of air from ground to top of atmosphere is measured in terms of Dobson units.
So, the correct answer is 'Dobson units'.

Concentration of ozone in troposphere is

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

  1. 0.05 ppm

  2. 0.1 ppm

  3. 1.5 ppm

  4. 10.0 ppm

Show answer
Correct Option: A

Zone of atmosphere near the ground is

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

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

  4. Homosphere

Show answer
Correct Option: A

What factor makes a man dominant species in biosphere?

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

  1. Body structure

  2. Ingenious brain power

  3. Powerful body

  4. Internal structure of body

Show answer
Correct Option: B

Where is the first Biosphere Reserve of India is located?

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

  1. Nilgiri

  2. Nanda Devi

  3. Sunder van

  4. Great Nicobar

Show answer
Correct Option: A

Global environment consists of three segments, included:

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

  1. Atmosphere, Hydrosphere and biosphere

  2. Stratosphere, troposphere, psudosphere

  3. Core, mantle, surface

  4. Atmosphere, stratosphere, Hydrosphere

Show answer
Correct Option: A