Water—The Essence of Life

What is the main message of the chapter "Water—The Essence of Life"?

1. Water is unlimited.
2. Water should be conserved and used wisely.
3. Only industries need water.
4. Water has no importance.

Which practice helps recharge groundwater?

1. Rainwater harvesting
2. Cutting trees
3. Wasting water
4. Polluting rivers

Which water source is salty?

1. River
2. Pond
3. Ocean
4. Lake

Which process removes dirt from water?

1. Filtration
2. Freezing
3. Evaporation
4. Condensation

Water vapour is found in the:

1. Soil
2. Atmosphere
3. Rocks
4. Sand

Which of these is NOT a natural source of water?

1. River
2. Pond
3. Tap
4. Lake

Which activity helps save water?

1. Ignoring leaking taps
2. Washing vehicles daily with a hose
3. Turning off taps after use
4. Allowing tanks to overflow

Which season usually receives the highest rainfall in India?

1. Summer
2. Monsoon
3. Winter
4. Spring

Which process forms clouds?

1. Condensation
2. Freezing
3. Melting
4. Filtration

Water is essential for:

1. Only humans
2. Only animals
3. Only plants
4. All living organisms

Which household appliance uses water?

1. Television
2. Washing machine
3. Radio
4. Fan

Which water source is found below the ground?

1. Ocean
2. Groundwater
3. River
4. Pond

Which natural process fills rivers and lakes again?

1. Rainfall
2. Wind
3. Earthquake
4. Lightning

Ice changes into water by:

1. Freezing
2. Melting
3. Condensation
4. Evaporation

Which state of water has a fixed shape?

1. Liquid
2. Gas
3. Solid
4. Vapour

Which of the following uses the least amount of water?

1. Washing a car with a hose
2. Using a bucket to wash a car
3. Keeping the tap open while washing dishes
4. Letting water overflow from a tank

Rainwater harvesting helps to:

1. Waste water
2. Increase pollution
3. Store rainwater for future use
4. Reduce rainfall

Which gas is released by plants during photosynthesis?

1. Carbon dioxide
2. Oxygen
3. Nitrogen
4. Hydrogen

Which of the following is a freshwater source?

1. Ocean
2. Sea
3. River
4. Bay

Which activity wastes the most water?

1. Turning off the tap while brushing
2. Repairing leaking taps
3. Leaving the tap running unnecessarily
4. Using a bucket for bathing

Which of the following is an example of precipitation?

1. Fog
2. Rain
3. Steam
4. Dew

What is the process of water vapour changing into tiny water droplets called?

1. Evaporation
2. Condensation
3. Melting
4. Boiling

Which process changes water into water vapour?

1. Condensation
2. Evaporation
3. Freezing
4. Filtration

Which of the following is the largest source of water on Earth?

1. Rivers
2. Lakes
3. Oceans
4. Ponds

Why is water called the "essence of life"?

1. It is colorful.
2. All living things need it to survive.
3. It is used only for drinking.
4. It is found only in rivers.