Q.1. With reference to the evolution of Earth’s atmosphere and hydrosphere, consider the following statements :
1. The primordial atmosphere of Earth, mainly composed of hydrogen and helium, was lost due to solar wind activity.
2. The process of degassing released gases like water vapour and carbon dioxide from Earth's interior during its cooling phase.
3. Oceans were formed due to condensation of water vapour, and were established within 500 million years of Earth’s formation.
4. Substantial accumulation of oxygen in the atmosphere began only after oceans were saturated through photosynthesis.
1. The primordial atmosphere of Earth, mainly composed of hydrogen and helium, was lost due to solar wind activity.
2. The process of degassing released gases like water vapour and carbon dioxide from Earth's interior during its cooling phase.
3. Oceans were formed due to condensation of water vapour, and were established within 500 million years of Earth’s formation.
4. Substantial accumulation of oxygen in the atmosphere began only after oceans were saturated through photosynthesis.
Choose the correct statements ?
Anonymous Quiz
13%
A. 1 and 2 only
34%
B. 1, 2 and 3 only
22%
C. 2, 3 and 4 only
31%
D. 1, 2, 3 and 4
Q.2. With reference to the internal structure of the Earth, consider the following statements :
1. The crust is brittle and its thickness is greater beneath the oceans than under continents.
2. The lithosphere includes both the crust and the uppermost part of the mantle, and its thickness may vary from 10 to 200 km.
3. The Outer core is in solid state and is said to be responsible for earth's magnetic field.
4. The lower mantle lies beneath the asthenosphere and is in solid state.
1. The crust is brittle and its thickness is greater beneath the oceans than under continents.
2. The lithosphere includes both the crust and the uppermost part of the mantle, and its thickness may vary from 10 to 200 km.
3. The Outer core is in solid state and is said to be responsible for earth's magnetic field.
4. The lower mantle lies beneath the asthenosphere and is in solid state.
How many of the above statements are correct ?
Anonymous Quiz
12%
A. Only one
54%
B. Only two
25%
C. Only three
9%
D. All four
Q.3. Consider the following :
1. Pyroclastic debris.
2. Ash and dust
3. Nitrogen compounds.
4. Sulphur compounds
5. Minor amounts of Hydrogen and Argon
1. Pyroclastic debris.
2. Ash and dust
3. Nitrogen compounds.
4. Sulphur compounds
5. Minor amounts of Hydrogen and Argon
How many of the above are products of during a volcanic eruption ?
Anonymous Quiz
8%
A. 1, 2 and 4 only
16%
B. 1, 2, 4 and 5 only
13%
C. 2, 3, 4 and 5 only
63%
D. 1, 2, 3, 4 and 5