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

Earliest hot atmosphere of earth contained :

  1. Molecules of hydrogen, Carbon and NItrogen

  2. Atoms of Hydrogen, Carbon, Oxygen and Nitrogen

  3. Atoms of Hydrogen, Sulphur and Carbon

  4. Molecules of Hydrogen, Methane and Ammonia
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the extremely hot, early stages of Earth, the atmosphere consisted of simple atoms like hydrogen, carbon, oxygen, and nitrogen, which had not yet formed complex stable molecules due to the intense thermal energy.

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

Primary atmosphere contained :

  1. $ CO _2, NH _3$ and $ H _2 O $
  2. $ CH _4 , NH _3, H _2 $ and $ H _2 O $
  3. $ CO _2, N _2 H _2 $ and $ H _2 O $
  4. $ CH _4 , CO _2 , N _2 , O _2 $ and $ H _2 O $
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Oparin-Haldane hypothesis suggests the primary atmosphere was composed of methane (CH4), ammonia (NH3), hydrogen (H2), and water vapor (H2O). These were the precursors for organic molecules.

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

In the mesosphere, the temperature decreases with altitude because there are very few molecules to absorb solar radiation. It drops from approximately -2 degrees Celsius at the stratopause to about -92 degrees Celsius at the mesopause.

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

Primordial soup is the name of :

  1. Rainy season ponds

  2. Hot solute rich early sea

  3. Hot molten surface of early earth

  4. Lava rich part of early earth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Primordial soup refers to the hypothetical solution of organic compounds in the early Earth's oceans, which provided the environment for the synthesis of life's building blocks.

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 layer protective to living beings from harmful rays is :

  1. Mesosophere

  2. Ozonosphere

  3. Thermosphere

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

The ozonosphere (ozone layer) in the stratosphere protects life from harmful UV radiation. The thermosphere also absorbs high-energy X-rays and gamma rays, providing additional protection. Both layers contribute to shielding Earth from dangerous solar and cosmic radiation.

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

Microspheres resemble living beings in their ability to :

  1. Assimilate chemicals

  2. Grow

  3. Divide

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

Microspheres (or proteinoid microspheres) are abiotic structures that exhibit properties like growth, division, and the ability to maintain internal chemistry, which are precursors to cellular life.

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

Methane of primary atmosphere disappeared in secondary atmosphere because of :

  1. Consumption in formation of carbohydrates

  2. Consumption in formation of various types of organic compounds

  3. Escaping in space
  4. Oxidation to $CO _2$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As free oxygen began to accumulate in the atmosphere due to photosynthesis, methane was oxidized into carbon dioxide and water, leading to its disappearance from the atmosphere.