Tag: evs - i

Questions Related to evs - i

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.

When the air temperature increases, the saturation vapor pressure will:

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

  1. Increase

  2. Decrease

  3. Remain the same

  4. Vary over an increasingly broad range of values

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Correct Option: A

Water vapor is:

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

  1. A gas

  2. A cloud droplet

  3. A rain drop

  4. A snowflake

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Correct Option: A

Distilled water is commonly used across manufacturing and within industry when the highest quality of water is required.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Distilled water is commonly used across manufacturing and within industry when the highest quality of water is required.

Distilled water is water free from impurities through distillation process. Distillation involves boiling the water and then condensing the steam into a clean container.
Where exceptionally high purity water is required, double distilled water is used.
Therefore, the correct answer is option A.

How much water is contained by hydrosphere?

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

  1. 1660 million cubic km

  2. 1560 million cubic km

  3. 1460 million cubic km

  4. 1360 million cubic km

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Correct Option: D

About how much water is recycled in the form of rains per year?

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

  1. 4.46 $\times 10^5$ gram per year

  2. 4.46 $\times 10^{10}$ gram per year

  3. 4.46 $\times 10^{20}$ gram per year

  4. 4.46 $\times 10^{30}$ gram per year

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Correct Option: C
Explanation:

Water exists at the earth's surface as liquid, solid, and vapour. It is changing from one of those three states to another. The total amount of water near the surface of the earth stays almost the same through time. One of the most important steps in the water cycle involves evaporation of water from the ocean surface, transport in the form of water vapour to the continents by winds, and precipitation as rain or snow on the continents. The rainfall then runs off by way of streams, rivers, and groundwater back to the ocean. Almost 4.46 10^20 gram per year of water is recycled in the form of rains per year.

Therefore, the correct answer is option C.

What does ocean, river and glacier form?

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

  1. Biosphere

  2. Hydrosphere

  3. Mesosphere

  4. Atmosphere

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Correct Option: B

Water remaining in the soil after a plant has permanently wilted is

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

  1. Hygroscopic water

  2. Ground water

  3. Gravitational water

  4. Capillary water

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Correct Option: A
Explanation:
Hygroscopic water is the water held tightly by the soil and cannot be taken up by plant roots because this water forms very thin films around soil particles and is not available to the plant. Thus the correct answer is option A.

The rain shadow effect is used to describe rainfall around certain mountain ranges. Choose the correct statement.

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

  1. The northern hemisphere and the southern hemisphere have the same prevailing winds

  2. Cool air can hold more moisture than warm air

  3. In the northern hemisphere, there is more rainfall on the eastern slopes

  4. You would expect deserts to form on the western side of mountain ranges in the northern hemisphere

  5. None of the above 

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Correct Option: E
Explanation:

An area with relatively little precipitation due to the presence of mountain range is called as rainshadow. This barrier causes the prevailing winds to lose their moisture on the windward side of the mountain ranges thereby causing the leeward side to be dry. The rain shadow effect, therefore, brings in rainfall to certain mountain ranges while its other side is generally a dry desert area. The prevailing wing or the  "trade winds" as they are called  are located at 30° North and 30° South latitudes. The trade winds which are present in the Northern Hemisphere come from the northeast, and those in the Southern Hemisphere come from the southeast. The "Westerly winds" are located 30 and 60 degrees latitudes, and, in contrast to the trade winds, originate from the southwest in the Northern Hemisphere and originate from the northwest in the Southern Hemisphere

Of the total water evaporated from oceans, precipitation returns

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

  1. 100%

  2. 90%

  3. 75%

  4. 50%

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Correct Option: B
Explanation:
Water evaporates from the ocean is about 90% and out of this only 10% precipitates on the earth land while the rest precipitates over the ocean.
So the correct option is '90%’.