Tag: evs

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Questions Related to evs

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

What are the advantages of water stored in the ground than pond water?

  1. It does not evaporate.

  2. It spreads out to recharge wells.

  3. Provides moisture for vegetation over a wide area.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The advantages of water stored in the ground than pond water:
(a) It does not evaporate
(b) It spreads out to recharge wells.
(c) Provides moisture for vegetation over a wide area.
(d) It is protected from contamination by animal and human wastes.
(e) It prevents breeding of insects.
Therefore, the correct answer is option D.
Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Largest amount of fresh water is found in

  1. Lakes and streams

  2. Underground

  3. Polar ice and glaciers

  4. Rivers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Over 68 percent of freshwater is found in polar ice & glaciers, while 30 percent is found in ground water, 0.3 percent is found in surface water of lakes rivers & ponds

So, the correct answer is 'Polar ice and glaciers'

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

The salinity of sea water is

  1. $2.5$%
  2. $3.5$%
  3. $4.5$%
  4. $5.5$%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sea water has a salinity of 3.5% i.e. the sea water contain about 35 grams of dissolved salt per kg of water ( about 1 litre of water ). This salinity is because of the rivers that carry chemical/salts dissolved out of rocks and soil. NaCl makes the most of this dissolved salt. 

So, the answer is option B

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Of the total fresh water, ground water constitutes

  1. 90%

  2. 10%

  3. 30%

  4. 44.2%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Percentage of fresh water in the hydrosphere is 2.5%. Out of this, about 68% of the fresh water is found in icecaps and glaciers and about 30% is found in ground water. About 98.5% of water in the hydrosphere is salt water.

Thus, the correct answer is '30%.'

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

The formation of ________ is the most characteristic feature in upper course of a river

  1. landslide

  2. canyons

  3. gorges

  4. waterfalls
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the upper course of a river, the gradient is steep and the river cuts vertically into the landscape, creating deep, narrow valleys known as gorges or canyons. Waterfalls are also common, but gorges are the most characteristic feature of the valley formation process here.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

More than 70% of world's freshwater is contained in

  1. Antarctica

  2. Glaciers and mountains

  3. Greenland

  4. Polar ice
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The oceans hold about 97% of water and the glaciers and polar ice caps hold another 2% of the total water on Earth. The polar ice caps contain 77% of the world's fresh water supply and another 22% is trapped in the ground, which leaves only 3% of the world’s fresh water supply in lakes and rivers. 

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Pick the correct statement.
I. The estuaries are semi-enclosed coastal body of water, which has a free connection with the open sea.
II. Estuaries may be considered as ecotones between the fresh and marine habitats.
Ill. The Estuaries are salt water lakes.
IV. The estuaries are fresh water lakes.

  1. I and II are correct.

  2. II and III are correct.

  3. III and IV are correct.

  4. I, II and III are correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Estuaries are unique plant and animal communities that have adapted to brackish water mixture of fresh water draining from the land and salty seawater. However, there are also several types of entirely freshwater ecosystems that have many similar characteristics to the traditional brackish estuaries. Estuaries may be considered as ecotones between the fresh and marine habitats.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Residence time of water in the atmosphere is

  1. 10 days

  2. 20 days

  3. 28 days

  4. 35 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Residence time is defined as the amount time a fluid, example water spends in a particular area/space. The residence time of the water is estimated at 10 days in the atmosphere.  
So, the correct answer '10 days'