Tag: sources of water

Questions Related to sources of water

During water cycle, the water undergoes .......... phase.

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Ice

  2. Liquid

  3. Gas

  4. All of the above

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Correct Option: D
Explanation:

  • The hydrological cycle is a prominent method to rejuvenate freshwater resources.
  • It involves the evaporation of water into water vapor by the heat of the sun which further condenses into tiny water droplets that fall on the earth as rain. This continuous recycling of water leads to the recharging of water resources.
  • It includes the interconversion of different states of water. The ice present in the glaciers melts due to the overheating of the earth and enters the hydrological cycle.

So, the correct answer is option D.

................... is one of the ways by which water moves on the Earth.

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Condensation

  2. Precipitation

  3. Runoff

  4. None of the above

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Correct Option: C
Explanation:

Runoff is one of the ways by which water moves across earth's surface, it can be both surface runoff and channel runoff. As it flows, the water may seep into the ground, evaporate into the air, stored in lakes or reservoirs, which are then to be extracted for agricultural or other human uses. 

Which of the following are essential for the maintenance of balance in the ecosystem?

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Water cycle

  2. Carbon cycle

  3. Nitrogen cycle

  4. All of these

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Correct Option: D
Explanation:

Water cycle, carbon cycle and nitrogen cycle are essential to maintaining balance in an ecosystem. Water evaporates due to heating and gets converted into water vapour. The vapours cool down and return back to earth as rain.

Carbon cycle maintains equilibrium between oxygen and carbon dioxide concentration in the atmosphere. Photosynthesis utilises the carbon dioxide and releases oxygen while the respiration utilises oxygen and give back carbon dioxide.
The nitrogen cycle is the process by which atmospheric nitrogen is fixed by the plants in form of nitrates and nitrites which are further released back to the atmosphere by the process of nitrification.
So, the correct answer is option D

Water vapour in the clouds undergoes ............ and comes down as rain.

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Evaporation

  2. Condensation

  3. Precipitation

  4. Percolation

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Correct Option: B

The groups of small rivers form bigger river is called as

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Iceberg

  2. Lagoon

  3. Estuaries

  4. Tributaries

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Correct Option: D

Lakes get water from 

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Ocean

  2. River

  3. Underground spring

  4. Icebergs

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Correct Option: C

Which of the following forms river?

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Rill

  2. Brooks

  3. Streams

  4. All of the above

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Correct Option: D

What is an aquifer?

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Underground lake

  2. Underground river

  3. Where water goes into ground

  4. None of the above

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Correct Option: C

Total earth's surface covered by water is

evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. 71%

  2. 60%

  3. 85%

  4. 50%

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Correct Option: A
Explanation:

71% of earth's surface is covered with water and 29% covered with land. This percentage of water is not only obvious sources of water like lakes, ponds, oceans but also the obvious sources of water like water in the air, frozen icecaps, glaciers, snow and underground water.

Therefore, the correct answer is option A.

Biochemical Oxygen Demand (BOD) in a river water :

evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

  1. Increases when sewage gets mixed with river water

  2. Remains unchanged when algal bloom occurs

  3. has no relationship with concentration of oxygen in the water

  4. Gives a measure of Salmonella in the water

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Correct Option: A