Tag: why conserve water

Questions Related to why conserve water

Animal that can change its colour is 

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

  1. Planaria

  2. Octopus

  3. Leech

  4. Hydra

Show answer
Correct Option: B
Explanation:
  • Squids, octopuses, and cuttlefishes are among the few animals in the world that can change the colour of their skin in the blink of an eye.
  •  These cephalopods a group of molluscs with arms attached to their heads can change their skin tone to match their surroundings, rendering them nearly invisible, or alternatively give themselves a pattern that makes them stand out. 
  • Hence, Animal that can change its colour is Octopus.
  • So, the correct answer is 'Octopus'.

Estuaries are considered as nutrient trap due to the mixing of

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

  1. River and sea water

  2. Pond and lake

  3. A and B

  4. None of the above

Show answer
Correct Option: A
Explanation:

Estuaries are the delicate water bodies where the fresh water from the river and salty water from the sea water meet and mix-up. They are responsible for transporting and mixing the nutrients. The difference in sedimentation of the water of rivers and sea-water, the wind action and the tidal activity allow the trapping and transport of the nutrients. Reefs, deltas and barrier islands protect the estuaries from the ocean forces.

Hence, the correct answer is 'River and sea water'.

If water vapor comprises 3.5 percent of an air parcel whose total pressure is 1,000 mb, the water vapor pressure would be:

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

  1. 1,035 mb

  2. 35 mb

  3. 350 mb

  4. 965 mb

Show answer
Correct Option: B

________ is the major source of fresh water.

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

  1. Ground water

  2. Sea water

  3. Lake

  4. None of the above

Show answer
Correct Option: A
Explanation:

Over 68 percent of the fresh water on the Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers and swamps.

Which of the following is the BEST indicator of the actual amount of water vapor in the air?

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

  1. Air temperature

  2. Saturation vapor pressure

  3. Relative humidity

  4. Dew point temperature

Show answer
Correct Option: D

______ is basic necessity for all terrestrial forms of life.

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

  1. Water

  2. Oxygen

  3. Iron

  4. None of the above

Show answer
Correct Option: A
Explanation:

Water is basic necessity for all terrestrial forms of life.

  • About 70% weight of human being is due to water.
  • All cellular processes takes place in water as medium.
  • All reactions taking place within our body cells involve substances that are dissolved in water.
  • Transportation of substances from one part of the body to another takes place in dissolved form.
  • Terrestrial life-forms require fresh water to get rid of high amounts of wastes.

The percentage of water in a human body is:

chemistry water in our life where do we get water from? why conserve water uses of water

  1. 80%

  2. 70%

  3. 60%

  4. 50%

Show answer
Correct Option: B
Explanation:

The percentage of water in human body is $70\%$. 


Different parts of the body contains different percentage of water and the average $\approx 70\%$.

Lagoon refers to

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

  1. A full moon

  2. A shallow body of water separated from a larger body of water by barrier islands or reefs.

  3. A spot in a desert made fertile by presence of water

  4. Horse shoe shaped coral reef

Show answer
Correct Option: B
Explanation:

A lagoon is a shallow body of water separated from a larger body of water by barrier islands or reefs. Lagoons are commonly divided into coastal lagoons and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around the world.

The largest brackish water lake in India is

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

  1. Wullar lake

  2. Sambhar lake

  3. Kabar lake

  4. Chilka lake

Show answer
Correct Option: D
Explanation:

Chilka Lake is a brackish water lagoon, which is the largest brackish water lake in India. It is spread over Puri, Khurda and Ganjam districts of Odisha state on the east coast of India, at the mouth of the Daya River, flowing into the Bay of Bengal, covering an area of over 1,100 square kilometre. Brackish water or briny water that has more salinity than fresh water, but not as much as sea water. It may result from mixing of sea water with fresh water, as in estuaries, or it may occur in brackish fossil aquifers.

The amount of freshwater of the earth frozen as polar or glacial ice is

evs - i water in our life where do we get water from? why conserve water uses of water

  1. 0.5%

  2. 0.02%

  3. 0.01%

  4. 1.7%

  5. 2.5%

Show answer
Correct Option: D
Explanation:

Water covers 71% of the Earth's surface. It is vital for all known forms of life. On Earth, 96.5% of the planet's water is found in seas and oceans, 1.7% in groundwater, 1.7% in glaciers and the ice caps of Antarctica and Greenland, a small fraction in other large water bodies, and 0.001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation. Only 2.5% of the Earth's water is freshwater, and 98.8% of that water is in ice and groundwater. Less than 0.3% of all freshwater is in rivers, lakes, and the atmosphere, and an even smaller amount of the Earth's freshwater (0.003%) is contained within biological bodies and manufactured products.