• Availability and forms of water - class-VII
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Availability and forms of water - class-VII

Description: availability and forms of water
Number of Questions: 21
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Tags: water water a precious resource rain: where does it come from biology chemistry water: a precious resource let's play with water water: a natural resource evs
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The freshwater stored in the ground is much more than that present in the rivers and lakes of the world.

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. True

  2. False

Show answer
Correct Option: A
Explanation:
  • Groundwater is the water found underground in the cracks and spaces in soil, sand, and rock. It is stored in and moves slowly through geologic formations of soil, sand, and rocks called aquifers.
  • Groundwater is the source of about 33 % of the water that county and city water departments supply to households and businesses (public supply).
  • Hence The freshwater stored in the ground is much more than that present in the rivers and lakes of the world is a true statement.
  • So, the correct answer is 'True'.

Which of the following is not naturally occurring form of water?

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. Solid

  2. Liquid

  3. Vapour

  4. Semi-solid

Show answer
Correct Option: D
Explanation:

Water exists in liquid form upto  $100^0$C , at 100$^0$C it exists as vapour and at 4$^0$C it exists in solid form  as ice. So water exists in all the states or forms except semisolid, jelly state

So, the correct answer is 'Semi-solid'

Rainfall patterns depend on

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. The underground water table

  2. The number of water bodies in an area

  3. The density pattern of human population in an area

  4. The prevailing season in an area.

Show answer
Correct Option: B
Explanation:

Rainfall pattern will depend on number of water bodies in an area, as there will be large water bodies, (ocean, river) the rate of evaporation would be high, which will help to cause rain in the area.

More than 70% of world's fresh water is contained in

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. Antarctica

  2. Polar ice

  3. Glaciers and Mountains

  4. Greenland

Show answer
Correct Option: B
Explanation:
More than 70% of world's fresh water is contained in Polar ice. These polar ice are present in the form of two sheets in Antartica and Greenland.
So, the correct answer is 'Polar ice'.

Water heats up ___________ and cools off ___________ than land.

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. More quickly, more quickly

  2. More quickly, more slowly

  3. More slowly, more quickly

  4. More slowly, more slowly

Show answer
Correct Option: D

What affected salamanders?

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. Acidity

  2. Pollutions

  3. Air pollution

  4. Water Pollutions

Show answer
Correct Option: A

How much did sea level rise in 20th century?

evs sources of water and water cycle groundwater and depletion of water table rain: where does it come from availability and forms of water the water cycle

  1. 1.3 mm/yr

  2. 1.8?mm/yr

  3. 1.7 mm/yr

  4. 1.9 mm/yr

Show answer
Correct Option: B

Water vapor is present in air only during the monsoon.

biology rain: where does it come from sources of water and water cycle availability and forms of water the water cycle

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

No, water vapor is present in the air during all seasons

Which of the following processes is unsuitable for softening water possessing temporary hardness?

biology rain: where does it come from sources of water and water cycle availability and forms of water the water cycle

  1. Adding calcium hydroxide

  2. Filtration

  3. Boiling

  4. Distillation

Show answer
Correct Option: A
Explanation:

If you added calcium oxide to water, it would react and make calcium hydroxide. Calcium hydroxide is produced, however, when calcium oxide is mixed (or slaked) with water. Overall, nothing significant happens when you mic Ca(OH)2 with water, certainly no reaction occurs. So, the correct option is "A" (Adding calcium hydroxide).

Which of the following is true?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. The gaseous form is the water vapour present in the air around us.

  2. The liquid form is the water vapour present in the air around us.

  3. The gaseous form is the water vapour present in the river.

  4. The gaseous form is the water vapour present at the poles of the earth.

Show answer
Correct Option: A
Explanation:

The gaseous form is the water vapor present in the air around us.

Liquid water is present in ______________.

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. oceans

  2. lakes

  3. rivers

  4. oceans, lakes, rivers, and even underground.

Show answer
Correct Option: D
Explanation:

Liquid water is present in oceans, lakes, rivers, and even underground.

Which of the following is true?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. The continuous cycling of water among its three forms keeps the total amount of water on the earth constant even when the whole world is using it.

  2. The continuous cycling of water among its three forms cannot keep the total amount of water on the earth constant even when the whole world is using it.

  3. The continuous cycling of water among its three forms decreases the total amount of water on the earth when the whole world is using it.

  4. The continuous cycling of water among its three forms keeps the total amount of water on the earth constant only if the whole world is not using it.

Show answer
Correct Option: A
Explanation:

The continuous cycling of water among its three forms keeps the total amount of water on the earth constant even when the whole world is using it.

When water circulates through the water cycle it can be found in the

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. Solid form.

  2. Liquid form.

  3. Gas form.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

When water circulates through the water cycle it can be found in all the three forms, i.e., solid, liquid and gasat any given time somewhere on the earth.

Farmers utilized large amount of groundwater by:

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. wells

  2. over pumping of groundwater

  3. both A and B

  4. none of the above

Show answer
Correct Option: B
Explanation:

Farmers utilized a large amount of groundwater by over-pumping of groundwater.

The solid form, snow and ice, is present as

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. Ice caps at the poles of the earth.

  2. Snow-covered mountains.

  3. Glaciers.

  4. Ice caps at the poles of the earth, snow-covered mountains and glaciers.

Show answer
Correct Option: D
Explanation:

The solid form, snow and ice, is present as ice caps at the poles of the earth,  snow-covered mountains and glaciers.

What is melting point of water?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. 6 C

  2. 0 C

  3. 9 C

  4. 10 C

Show answer
Correct Option: B

For most of the cities water is drawn from 

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. Rivers.

  2. Lakes.

  3. Ponds or wells.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

 The water is drawn from nearby lakes, rivers, ponds or wells and is supplied through a network of pipes. 

The continuous cycling of water among its three forms keeps:

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. the total amount of water on the earth constant

  2. the total amount of water on the earth decreasing continuously

  3. water fresh

  4. none of these

Show answer
Correct Option: A
Explanation:

The continuous cycling of water among its three forms keeps the total amount of water on the earth constant.

Which of the following spatial units is the largest in terms of scale?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. River segments

  2. Mesohabitats

  3. Patches

  4. River reaches

Show answer
Correct Option: A

Which year was declared as the "Water Year" by Indian government

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. 2010

  2. 2004

  3. 2007

  4. 2000

Show answer
Correct Option: C

Mullets, bhetki, pearl spots, prawns, mussels are the examples of 

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. marine fish

  2. fresh water fish

  3. finned fish

  4. shell fish.

Show answer
Correct Option: B
Explanation:

Fresh water fisheries are found in ponds, tanks, rivers and various water bodies catla, rohu, mullets, and bhetki are some fresh water fisheries. They have important contribution to the growth of the economy of the country. There has been a very impressive growth in fish production during 1990's in the country.

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