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Science MCQ (1 Marks)

Water: A Precious Resource · CBSE STD 7 (CBSE - English Medium). 149 questions.

Questions · Page 3 of 3

MCQ (1 Marks)

MCQ 1011 Mark
Clouds are:
  • ✓
    Tiny drops of water floating in the air.
  • B
    Mixture of dust and water vapour.
  • C
    Particles of water vapour.
  • D
    Raindrops in the air.
Answer
Correct option: A.
Tiny drops of water floating in the air.
Water vapour condenses in the air and forms tiny droplets of water that float foamy in air, known as clouds.
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MCQ 1021 Mark
Which state of India gets the least rainfall?
  • A
    Uttar Pradesh
  • B
    Maharashtra
  • C
    Bihar
  • ✓
    Rajasthan
Answer
Correct option: D.
Rajasthan
Rajasthan is a deseert so receives very less rainfall.
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MCQ 1031 Mark
The ground water bearing layer of the earth which is below the water table is:
  • A
    Water table
  • B
    Sea level
  • ✓
    Aquifer
  • D
    None of these
Answer
Correct option: C.
Aquifer
Aquifer is the place where the ground water is stored between layer of hard rock below the water table.
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MCQ 1041 Mark
Main source of water on earth is:
  • ✓
    Rain
  • B
    Snow
  • C
    Glaciers
  • D
    All the above
Answer
Correct option: A.
Rain
The main source of water is the rainwater.
The water cycle is a process that involves evaporation, condensation and precipitation and the output is rainwater.
The water source is important in the water cycle.
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MCQ 1051 Mark
Which dried river in Rajasthan was revived?
  • A
    Mahi
  • ✓
    Sarsa
  • C
    Beas
  • D
    Luni
Answer
Correct option: B.
Sarsa
Arveri, Ruparel, Sarsa, Bhagani and Jahazwali rivers in Rajasthan were dry and were revived by constructing water$-$harvesting structures.
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MCQ 1061 Mark
Which of the following is the basic necessity for all the living beings?
  • A
    Vehicle
  • ✓
    Water
  • C
    Soil
  • D
    None of the Above
Answer
Correct option: B.
Water
Water is the basic necessity for all terrestrial forms of life. About $70\%$ weight of human beings has water.
It is very important for the existence of life on Earth.
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MCQ 1071 Mark
Which of the following is a way to use water economically?
  • A
    Construction of bawris.
  • B
    Rainwater harvesting.
  • ✓
    Drip irrigation.
  • D
    Infiltration.
Answer
Correct option: C.
Drip irrigation.
Drip irrigation.
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MCQ 1081 Mark
Which one of the following is not responsbile for water shortage?
  • A
    Rapid growth of industries.
  • B
    Increasing population.
  • ✓
    Heavy rainfall.
  • D
    Mismanagement of water resources.
Answer
Correct option: C.
Heavy rainfall.
Heavy rainfall.
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MCQ 1091 Mark
The water bearing layer of the earth is called:
  • A
    Conifer
  • B
    Hydrosphere
  • ✓
    Aquifer
  • D
    Water table
Answer
Correct option: C.
Aquifer
The main source of groundwater is the rain.
The impermeable rock does not allow water to pass through it.
So, water starts collecting above the impermeable rock and fills the soil and permeable rocks completely with water up to the level known as water table.
The underground layer of soil and permeable rocks in which water collects under the ground is called an aquifer.
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MCQ 1101 Mark
Which of the following is the most important factor in balancing the amount of fresh water on earth?
  • ✓
    Water cycle
  • B
    Green house effect
  • C
    Wastewater treatment plants
  • D
    Transpiration
Answer
Correct option: A.
Water cycle
Out of all the options, option A is correct as water cycle is the most important factor in balancing the amount of fresh water on earth.
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MCQ 1111 Mark
River Yamuna is polluted near Delhi due to:
  • A
    Thermal plant on its bank
  • B
    Water animals
  • ✓
    Addition of untreated sewage
  • D
    Rivers joining it
Answer
Correct option: C.
Addition of untreated sewage
Essentially, the release of poorly treated or even completely untreated sewage is responsible for the frothing and foaming of the river water.
Surfactants and phosphates that originate from detergents used in households and industrial laundries, when released in the river untreated, create the foam.
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MCQ 1121 Mark
What is the main source of drinking water for us?
  • A
    Oceans
  • B
    Glaciers
  • C
    Rivers
  • ✓
    Groundwater
Answer
Correct option: D.
Groundwater
Groundwater is the main source of drinking water for us.
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MCQ 1131 Mark
The process of seeping of water into the ground is called:
  • ✓
    Infiltration.
  • B
    Aquifer.
  • C
    Water table.
  • D
    Bawri.
Answer
Correct option: A.
Infiltration.
Infiltration.
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MCQ 1141 Mark
The percentage of water in a human body is:
  • A
    $80\%$
  • ✓
    $70\%$
  • C
    $60\%$
  • D
    $50\%$
Answer
Correct option: B.
$70\%$

The percentage of water in the human body is $70\%.$
Different parts of the body contain different percentages of water and the average $≈70\%.$

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MCQ 1151 Mark
On which of the following day is “World Water Day” observed?
  • ✓
    $22$ March
  • B
    $14$ November
  • C
    $2$ October
  • D
    $21$ December
Answer
Correct option: A.
$22$ March

$22$ March is celebrated as the World Water Day.

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MCQ 1161 Mark
The circulation of water between ocean and land is known as the:
  • A
    Oxygen cycle
  • ✓
    Water cycle
  • C
    Nitrogen cycle
  • D
    None of these
Answer
Correct option: B.
Water cycle
The circulation of water between ocean and land is known as water cycle.
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MCQ 1171 Mark
Steam is which form of water?​
  • A
    Solid
  • B
    Liquid
  • ✓
    Gas
  • D
    None of these
Answer
Correct option: C.
Gas
Steam is water in the gas phase.
Steam that is saturated or superheated is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as water vapour condenses.
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MCQ 1181 Mark
What are main sources of water?
  • A
    Rainwater.
  • B
    Glaciers, ice.
  • C
    sea and Ocean water.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
d. All of the above.
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MCQ 1191 Mark
One of these is not a source of surface water:
  • A
    Rain
  • B
    River
  • ✓
    Lake
  • D
    Spring
Answer
Correct option: C.
Lake
Spring is not a source of surface water.
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MCQ 1201 Mark
Which one of the following is not responsible for water shortage?
  • A
    Rapid growth of industries.
  • B
    Increasing population.
  • ✓
    Heavy rainfall.
  • D
    Mismanagement of water resources.
Answer
Correct option: C.
Heavy rainfall.
Heavy rainfall does not cause water shortage as it fills up the rivers, lakes and ponds and also replenishes groundwater.
On the other hand, rapid industrialisation, population growth and mismanagement of water resources leads to water shortage because of overuse of water.
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MCQ 1211 Mark
Rainwater harvesting is a method of:
  • ✓
    Collecting rainwater and directing into ground.
  • B
    Producing water for future use.
  • C
    Using rain water for daily purpose.
  • D
    All of these.
Answer
Correct option: A.
Collecting rainwater and directing into ground.
Collecting rainwater and directing into ground.
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MCQ 1221 Mark
Sanjeev is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?
  • A
    Condensation of water vapor forms clouds.
  • B
    The trees and plants put some of this water into air as water vapor by the process of transpiration.
  • C
    The process of seeping of water into the ground is called infiltration.
  • ✓
    None of the above
Answer
Correct option: D.
None of the above
None of the above
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MCQ 1231 Mark
What happens if it doesn't rain for a long time?
  • ✓
    Ponds and wells dry up.
  • B
    Level of groundwater increases.
  • C
    There is no shortage of water.
  • D
    It causes water pollution.
Answer
Correct option: A.
Ponds and wells dry up.
When it does not rain for a long time, the grounwater is not replenished.
So, the level of groundwater decreases and wells and ponds dry up.
There is shortage of water. But lack of rainfall is not a direct cause of water pollution.
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MCQ 1241 Mark
Water is found in:
  • A
    Solid form
  • B
    Liquid form
  • C
    Gaseous form
  • ✓
    All of these
Answer
Correct option: D.
All of these
All of these
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MCQ 1251 Mark
As per the United Nations what is the minimum amount of water required for a person?
  • A
    $100$ litre
  • ✓
    $50$ litre
  • C
    $10$ litre
  • D
    $20$ litre
Answer
Correct option: B.
$50$ litre

These uses ordinarily include drinking, personal sanitation, washing of clothes, food preparation and personal and household hygiene.
According to the World Health Organization $(WHO),$ between $50$ and $100$ litres of water per person per day are needed to ensure that most basic needs are met.

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MCQ 1261 Mark
Water and forest are:
  • A
    Non $-$ renewable resources
  • B
    Water cycle
  • ✓
    Renewable resources
  • D
    None of these
Answer
Correct option: C.
Renewable resources
Water and forest are renewable resources.
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MCQ 1271 Mark
Snow and ice, is present as ice caps in the form of:
  • A
    Liquid
  • ✓
    Solid
  • C
    Gas
  • D
    None of these
Answer
Correct option: B.
Solid
Snow and ice is present in the form of solids.
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MCQ 1281 Mark
Which of the following are not the liquid forms of water?
  • ✓
    Snow
  • B
    Lake water
  • C
    River water
  • D
    Ice
Answer
Correct option: A.
Snow
Snow is the solid form of water.
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MCQ 1291 Mark
Water used for washing vegetables may be used $........$
  • A
    As drinking water
  • ✓
    To water plants in the garden
  • C
    As medicine
  • D
    None of the above
Answer
Correct option: B.
To water plants in the garden
Water used for washing vegetables may be used to water plants in the garden.
But cannot be used for drinking or as medicine.
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MCQ 1301 Mark
Which of the following will lead to reduction in availability of ground water?
  • A
    Plantation
  • B
    Rain water harvesting
  • C
    Constructing more lakes
  • ✓
    Building concrete roads
Answer
Correct option: D.
Building concrete roads
Most of the land is covered with concrete and this reduces the seepage of rainwater into the ground which ultimately affects the availability of ground water.
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MCQ 1311 Mark
Water is present in lakes in the form of:
  • A
    Solid
  • ✓
    Liquid
  • C
    Gas
  • D
    None of these
Answer
Correct option: B.
Liquid
Water is present in the form of liquid.
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MCQ 1321 Mark
How are people getting water now?
  • A
    From Jal Board water tanker
  • B
    From taps
  • C
    From the handpump
  • ✓
    All of these
Answer
Correct option: D.
All of these
Nowadays, people in different cities get water differently.
Some gets it from the Jal Board water tanker, some get in inside their house through taps.
Some have to fill buckets from handpump.
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MCQ 1331 Mark
The water vapour is present in the air, in the form of:
  • A
    Solid
  • B
    Liquid
  • ✓
    Gas
  • D
    None of these
Answer
Correct option: C.
Gas
Water vapour is present in the form of gas.
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MCQ 1341 Mark
In a science quiz competition, Latika are asked a question where she had to choose the statement which was$/$ were incorrect?
  • A
    A place called Bhujpur in the Kutch area of Gujarat state has a very erratic rainfall.
  • B
    In $1989,$ the village people along with a Non $-$ Government Organization $\text{(NGO)}$ decided to harvest rainwater.
  • C
    Rajasthan is hot and dry place which gets a meagre rainfall.
  • ✓
    The scarcity of water will not affect the nutrient, uptake by the plants and the process of food making photosynthesis in plants.
Answer
Correct option: D.
The scarcity of water will not affect the nutrient, uptake by the plants and the process of food making photosynthesis in plants.
The scarcity of water will affect the nutrient uptake by the plants and the process of food making $($photosynthesis$)$ in plants.
So, due to scarcity of water, the plants will not be able to make sufficient food for themselves and for animals $($including human beings$).$
This will lead to severe shortage of food leading to famine.
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MCQ 1351 Mark
Water harvesting is done by $.........$ processes.
  • A
    Rainwater
  • B
    Groundwater
  • ✓
    Both $A$ and $B$
  • D
    Atmospheric water
Answer
Correct option: C.
Both $A$ and $B$
Water Harvesting
It means storing rain where it falls or storing the run off in your own village or town.
And taking measures to keep that water clean by not allowing polluting activities to take place in our locality.
It can be done by two major processes:
  1. Rainwater harvesting
It is a method of collection and storage of rainwater into natural reservoirs or tanks or the infiltration of surface water into subsurface aquifers.
  1. Groundwater harvesting
Groundwater harvesting is a method to save water placed under the ground to control the groundwater flow in an aquifer and to raise the water table.
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MCQ 1361 Mark
$.........$ is the major source of fresh water.
  • ✓
    Groundwater
  • B
    Sea $-$ water
  • C
    Lake
  • D
    None of the above
Answer
Correct option: A.
Groundwater
Groundwater and surface waters are the major sources of fresh water in India.
Groundwater is the water present beneath the earth's surface which can be extracted in various ways.
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MCQ 1371 Mark
Water in our tap comes from:
  • A
    River
  • B
    Lake
  • C
    Well
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
River, lake, well are the natural storage and sources of water.
We draw water from these sources for daily usage.
Conclusion: Sources of tap water are rivers, lakes, and wells.
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MCQ 1381 Mark
The solid parts of the earth’s crust called:
  • A
    Atmosphere
  • ✓
    Lithosphere
  • C
    Hydrosphere
  • D
    None of these
Answer
Correct option: B.
Lithosphere
The outermost layer, called the crust, is solid, too. Together, these solid parts are called the lithosphere. Earth's crust is made up of hard rocks.
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MCQ 1391 Mark
Addition of harmful substance in water leads to:
  • A
    Algal bloom
  • B
    Microbial growth
  • C
    High oxygen demand
  • ✓
    Water pollution
Answer
Correct option: D.
Water pollution
The addition of any substance to water, which leads to change in its physical and chemical characteristic, is defined as water pollution.
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MCQ 1401 Mark
Renewable resources need to be conserved because:
  • ✓
    We should not use them faster than they are replenished by nature.
  • B
    They are slowly disappearing from the earth.
  • C
    If we overuse them, nature will stop replacing them.
  • D
    None of these
Answer
Correct option: A.
We should not use them faster than they are replenished by nature.
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MCQ 1411 Mark
Read the following sentences carefully, and choose the correct one:
  • A
    The highly salty sea water can be made fit for human use but it is very, very expensive to do so.
  • B
    For millions of years of fresh water supply on land has been maintained by the water cycle.
  • C
    The trees and plants suck ground water through their roots.
  • ✓
    All the above
Answer
Correct option: D.
All the above
All the above
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MCQ 1421 Mark
In wells, boring and hand pumps water comes from:
  • A
    Sea
  • B
    Rivers
  • ✓
    Ground water
  • D
    None of these
Answer
Correct option: C.
Ground water
In wells, boring and hand pumps water comes horn ground water.
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MCQ 1431 Mark
Consider the following statements and choose the incorrect one:
  • A
    The saline water of seas and oceans is not fit for human consumption.
  • B
    The water which is fit for use by human beings is called fresh water.
  • C
    The readily available fresh water for use by human beings is only is $0.014\%$ of all the fresh water present on the earth.
  • ✓
    None of the above
Answer
Correct option: D.
None of the above
None of the above
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MCQ 1441 Mark
The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of __________ per person per day.
  • A
    $200$ litres
  • B
    $150$ litres
  • C
    $100$ millilitres
  • ✓
    $50$ litres
Answer
Correct option: D.
$50$ litres

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of $50$ litres per person per day.

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MCQ 1451 Mark
Water that moves over the surface of the ground into lakes and rivers is called:
  • A
    Ground water
  • B
    A water table
  • ✓
    Run $-$ off
  • D
    The water cycle
Answer
Correct option: C.
Run $-$ off
The run $-$ off process leads water towards lakes and rivers.
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MCQ 1461 Mark
Activities which involve wastage of water are:
  • A
    Washing.
  • B
    Using the taps which are Leaking.
  • C
    Bathing.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
All of the above.
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MCQ 1471 Mark
The process of changing water vapour into water is called:
  • A
    Boiling
  • ✓
    Condensation
  • C
    Evaporation
  • D
    Sedimentation
Answer
Correct option: B.
Condensation
The process of changing water vapour into water is called condensation.
This is due to the change of gaseous state of water into liquid state.
Some common examples of condensation are Formation of drops of water on the outside of a glass of ice water. ,Formation of dew on grass overnight.
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MCQ 1481 Mark
The circulation of water from the surface of the earth to the atmosphere and back to the surface is known as:
  • A
    Water circle
  • ✓
    Water cycle
  • C
    Water round
  • D
    None of the above
Answer
Correct option: B.
Water cycle
The water cycle refers to the continuous cycle of water as it evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation.
This water then collects in rivers and lakes, soil, etc. and flows back into the oceans.
From there, it evaporates again to reach the atmosphere.
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MCQ 1491 Mark
The solid form, snow and ice, is present $........$ of the earth.
  • ✓
    At the poles.
  • B
    At the equator.
  • C
    Present in the atmosphere of the earth.
  • D
    In the oceans.
Answer
Correct option: A.
At the poles.
At the poles.
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MCQ (1 Marks) - Page 3 - Science STD 7 Questions - Vidyadip