Tag: first aid

Questions Related to first aid

Deforestation and pollution are the main causes of drought.

evs safety and first aid the lithosphere and the hydrosphere first aid the atmosphere

  1. True

  2. False

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Correct Option: A

The forest fire is a man made calamity whereas fire is a natural calamity.

evs safety and first aid the lithosphere and the hydrosphere first aid the atmosphere

  1. True

  2. False

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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

What happens when rain falls on soil without vegetational cover?

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

  1. Rain water percolates in soil efficiently

  2. Rain water causes loss of surface soil

  3. Rain water leads to fertility of the soil

  4. Rain water does not cause any change in soil

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Correct Option: B
Explanation:

Vegetation cover on the ground helps to hold the soil in place. It also helps in percolating water into the deeper layers of the soil. The absence of vegetational cover may lead to soil erosion.

So, the correct answer is option B.

Abundant source of inonazite sands are found on the sea shores of

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

  1. Maharashtra

  2. West Bengal

  3. Tamil Nadu

  4. Kerala

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Correct Option: D