Water Book Back Answers & Guides
Unit 2 > Science > Class 4 > Samacheer Kalvi - English Medium
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1. Water is the most __________ resource on the Earth.
(a) precious
(b) solid
(c) gas
Correct answer:
(a) precious
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2. Water exists in _________ states.
(a) two
(b) three
(c) four
Correct answer:
(b) three
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3. At temperature below _______ water freezes to form ice.
(a) 10°C
(b) 100°C
(c) 0°C
Correct answer:
(c) 0°C
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4. . ______ is the process by which water becomes water vapour.
(a) Condensation
(b) Evaporation
(c) Freezing
Correct answer:
(b) Evaporation
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5. Which controls the ecological functions of life?
(a) Bicycle
(b) Water cycle
(c) Recycle water
Correct answer:
(b) Water cycle
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1. Water is converted into __________ when it is heated (ice cube / water vapour).
Correct answer:
Water vapour
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2. Water becomes ice on _________ (heating / freezing).
Correct answer:
freezing
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3. Water droplets Combines to forms ___________ (rain /clouds).
Correct answer:
Clouds
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4. Water cycle increases the availability of ________ (water tank / ground water).
Correct answer:
Ground water
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5. _____________ is a type of rainwater harvesting (Roof top harvesting / Watercycle).
Correct answer:
Roof top harvesting
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1. Water is a good example for all states of matter.
Correct answer:
TRUE
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2. Water cycle controls Earths temperature.
Correct answer:
TRUE
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3. Water becoming water vapour on heating is called evaporation.
Correct answer:
TRUE
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4. 37% of our brains mass consists of water.
Correct answer:
TRUE
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5. Roof top harvesting method is used in agriculture field.
Correct answer:
FALSE