Science - Water
Exam Duration: 45 Mins Total Questions : 30
Identify the source of ground water
- (a)
Sub-soil water
- (b)
River water
- (c)
Rain water
- (d)
All of the above
In a small town, the number of water pumps, concrete houses and roads increased. What happens to the water table of that place?
- (a)
It becomes lower
- (b)
It becomes higher
- (c)
It remains unaffected
- (d)
It first becomes lower and then higher.
Which of the following is potable water?
- (a)
A glass of water fit for drinking
- (b)
Water in a pot
- (c)
Sea water
- (d)
Water with bacteria and chemicals
Why is water useful to life on the earth?
(i) It maintains ecological balance.
(ii) It sustains life.
(iii) It is necessary for respiration in aquatic organisms.
- (a)
Only (i) and (ii)
- (b)
Only (ii)and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
Which of the following statements is true?
- (a)
The salinity of sea increases tremendously in a short time.
- (b)
The salinity of rivers decreases with time.
- (c)
The salinity of seas increases with time.
- (d)
The salinity of seas remains constant with time.
Rain water harvesting is a method employed to
- (a)
stop soil erosion in a place.
- (b)
raise the water table of a place.
- (c)
decrease drought at a place.
- (d)
decrease floods at a place.
What causes the formation of salt from sea water?
- (a)
Evaporation
- (b)
Condensation
- (c)
Transpiration
- (d)
Transformation
Why is water scarcity increasing day by day?
- (a)
Water cycle has stopped functioning.
- (b)
The total amount of water on earth has decreased.
- (c)
The consumption of water has increased.
- (d)
There is an increasing frequency of floods.
Which of the following is polluted by man or factories?
- (a)
Ponds
- (b)
Rivers
- (c)
Ground water
- (d)
All of the above
Which of the following will be an advantage of inter-linking rivers in India?
- (a)
Lot of people will gain employment.
- (b)
Floods will take place uniformly throughout the country.
- (c)
Water will be distributed uniformly.
- (d)
India will become a technically advanced country.
'X' is a process by which plants lose water. What is X?
- (a)
Evaporation
- (b)
Transpiration
- (c)
Condensation
- (d)
Translocation
For which of the following purposes is saline water NOT used?
(i) For washing clothes
(ii) For drinking
(iii) For agriculture
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
A cloud is unable to hold droplets of water because
- (a)
they become heavier.
- (b)
they become lighter.
- (c)
they undergo condensation slowly.
- (d)
they undergo sublimation.
Observe the figure given below and identify the process.
- (a)
Water cycle
- (b)
Water purification
- (c)
Water condensation
- (d)
Rain water harvesting
Which of these occurs due to condensation?
- (a)
The drying of wet clothes.
- (b)
Water drops appearing on the outer side of a cool water bottle.
- (c)
Steam rising from wet clothes when they are ironed.
- (d)
Black board gets dried after it is wiped with wet cloth.
Human body contains water upto
- (a)
90%.
- (b)
50%.
- (c)
70%.
- (d)
80%.
Which of these constituents present in air leads to the formation of fog and mist?
- (a)
Nitrogen
- (b)
Oxygen
- (c)
Water vapour
- (d)
Carbon dioxide
The process of collecting rain water in huge, cemented pits is called
- (a)
storing of water.
- (b)
filtration of water.
- (c)
transportation of water.
- (d)
rain water harvesting.
Water is
- (a)
an element.
- (b)
a compound.
- (c)
a mixture.
- (d)
Both (A) and (C)
Why is mineral water better than distilled water for drinking?
- (a)
Mineral water is cheap.
- (b)
Mineral water is easily available.
- (c)
Mineral water contains dissolved salts
- (d)
Mineral water is colorful.
Soil erosion takes place due to
- (a)
floods.
- (b)
drought.
- (c)
transpiration.
- (d)
All of the above.
Which of the following causes water to change from one state to another?
- (a)
Pressure
- (b)
Concentration
- (c)
Temperature
- (d)
Volume
Efforts should be made to
- (a)
allow the water to seep into the ground
- (b)
collect surface run off into local ponds and reservoirs
- (c)
catch water where it falls
- (d)
all of these
Only a small fraction of water is available on earth for use by living organism. This is because
- (a)
about 20/0 of water is fresh water
- (b)
most of the fresh water is locked in glaciers and polar ice caps.
- (c)
98% of the water on earth is saline
- (d)
all of these
Water purification is done to make water fit for use. Which of these can help in purification of water?
- (a)
distillation
- (b)
reverse osmosis
- (c)
boiling
- (d)
all of these
Parul wants to know what can happen if it does not rain for a long period of time
- (a)
The soil will lose water and become dry
- (b)
The soil will lose water and become dry
- (c)
Ground water level will drop
- (d)
All of these
In case drought occurs, then
- (a)
crops may fail
- (b)
animals may die of starvation and dehydration
- (c)
food and fodder will become scarce
- (d)
all of these.
Which one of the following does not have water?
- (a)
meat
- (b)
onion
- (c)
apple
- (d)
none of these
Vidhi took out a bottle of water from the refrigerator and left it on the table. After ten minutes she found a puddle of water around it.
What had happened?
- (a)
The bottle was leaking
- (b)
The bottle was broken and should be thrown away
- (c)
Both 'a' and 'b'.
- (d)
Condensation occurred.
It is a cold winter day. Atharva has to dry his school uniform for the next day.
How can he dry his uniform in such weather conditions?
- (a)
He can put his uniform near a fire place like an anghiti or clay stove.
- (b)
He can put his uniform near a room heater
- (c)
He can apply hot iron and try to dry it.
- (d)
All of these