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05. Water

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Last edited 25 days ago by Learn LoopHQ.

Chapter: 05. Water

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Fill in the blanks

About _ _ _ _ _ _ _ _ _ _ _ _ _ _ of the total water present on earth is in seas and oceans.

97%

Two-thirds of the Earth’s surface is covered with _ _ _ _ _ _ _ _ _ _ _ _ _ _.

water

About _ _ _ _ _ _ _ _ _ _ _ _ _ _ of the human body is water.

70%

The scientist who proved water is a compound in 1781 was _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Henry Cavendish

Water is a _ _ _ _ _ _ _ _ _ _ _ _ _ _ liquid and its chemical formula is _ _ _ _ _ _ _ _ _ _ _ _ _ _.

transparent, H₂O

The boiling point of pure water is _ _ _ _ _ _ _ _ _ _ _ _ _ _ and freezing point is _ _ _ _ _ _ _ _ _ _ _ _ _ _.

100°C, 0°C

Water is a _ _ _ _ _ _ _ _ _ _ _ _ _ _ solvent because a large number of substances dissolve in it.

universal

Rainwater is the _ _ _ _ _ _ _ _ _ _ _ _ _ _ form of water available on earth.

purest

Rainwater contains dissolved gases like _ _ _ _ _ _ _ _ _ _ _ _ _ _ and _ _ _ _ _ _ _ _ _ _ _ _ _ _.

oxygen, carbon dioxide

The process of removal of dissolved salts from sea/ocean water is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

desalination

The level of groundwater is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _.

water table

Water from some wells and springs has minerals with _ _ _ _ _ _ _ _ _ _ _ _ _ _ properties.

medicinal

_ _ _ _ _ _ _ _ _ _ _ _ _ _ are tiny droplets of water formed after the condensation of water vapour in air on cold objects.

Dew

The continuous movement of water from the earth’s surface as water vapour to the atmosphere and back is called the _ _ _ _ _ _ _ _ _ _ _ _ _ _.

water cycle

When water is cooled below 4°C, it starts _ _ _ _ _ _ _ _ _ _ _ _ _ _, which is called anomalous expansion.

expanding

Water regulates the temperature of our body by _ _ _ _ _ _ _ _ _ _ _ _ _ _.

sweating/perspiration

Water fit and safe for drinking purpose is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

potable water

Cholera and diarrhoea are examples of _ _ _ _ _ _ _ _ _ _ _ _ _ _ diseases.

water-borne

Jaundice primarily affects the _ _ _ _ _ _ _ _ _ _ _ _ _ _ of a person.

liver

Sterilisation is the process of the removal of _ _ _ _ _ _ _ _ _ _ _ _ _ _ from water.

germs

In a water treatment plant, _ _ _ _ _ _ _ _ _ _ _ _ _ _ is added in the loading tank to settle down suspended impurities faster.

alum

Many modern water purifiers are based on the _ _ _ _ _ _ _ _ _ _ _ _ _ _ technique.

Reverse Osmosis (RO)

Distilled water is obtained by the process of _ _ _ _ _ _ _ _ _ _ _ _ _ _.

distillation

A substance that dissolves in other substance to form a solution is called a _ _ _ _ _ _ _ _ _ _ _ _ _ _.

solute

A solution in which a solute is dissolved in water is called an _ _ _ _ _ _ _ _ _ _ _ _ _ _ solution.

aqueous

A _ _ _ _ _ _ _ _ _ _ _ _ _ _ solution is one in which no more solute can be dissolved at a given temperature.

saturated

The solubility of a substance in water generally _ _ _ _ _ _ _ _ _ _ _ _ _ _ with an increase in temperature.

increases

The contamination of water with unwanted substances that makes it unfit for drinking is called _ _ _ _ _ _ _ _ _ _ _ _ _ _.

water pollution

Oil spill from _ _ _ _ _ _ _ _ _ _ _ _ _ _ is one of the major causes of water pollution in seas.

tankers

_ _ _ _ _ _ _ _ _ _ _ _ _ _ farming should be encouraged to reduce water pollution from chemicals.

Organic

_ _ _ _ _ _ _ _ _ _ _ _ _ _ is a method where rainwater is collected on the roof and stored in underground tanks.

Rooftop rainwater harvesting

_ _ _ _ _ _ _ _ _ _ _ _ _ _ is celebrated on March 22nd to emphasize the importance of water conservation.

World Water Day

Excess rain may cause _ _ _ _ _ _ _ _ _ _ _ _ _ _ and no rainfall may cause _ _ _ _ _ _ _ _ _ _ _ _ _ _.

floods, drought

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