Tag: sources of water

Quizzes (13) Questions (140)

Questions Related to sources of water

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

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

  1. Ice

  2. Liquid

  3. Gas

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

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

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

  1. Condensation

  2. Precipitation

  3. Runoff

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

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

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

  1. Water cycle

  2. Carbon cycle

  3. Nitrogen cycle

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
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

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

What is an aquifer?

  1. Underground lake

  2. Underground river

  3. Where water goes into ground

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An aquifer is an underground body of permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. Since none of the specific choices like underground lake or river correctly define an aquifer, none of the above is correct.

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

Total earth's surface covered by water is

  1. 71%

  2. 60%

  3. 85%

  4. 50%
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Biochemical Oxygen Demand (BOD) in a river water :

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BOD measures the amount of oxygen required by aerobic microorganisms to decompose organic matter. Sewage contains high levels of organic matter, which increases microbial activity and thus increases BOD.