Water Resources and Usage Assessment

The video tutorial covers the importance and availability of water, its sources, and its role in various sectors like agriculture, industry, and electricity generation. It also explains the concept of potable water and its characteristics.

Why is water considered essential for human life?

• It is a source of entertainment.

• It is used for transportation.

• It is necessary for drinking and hygiene.

• It is used to build houses.

What percentage of the Earth's surface is covered by water?

• 80%

• 60%

• 75%

• 50%

What fraction of Earth's water is freshwater available for human use?

• 5%

• 3%

• 10%

• 1%

What percentage of Earth's water is found in oceans and seas?

• 60%

• 99%

• 50%

• 97%

What is the primary reason ocean water is not suitable for drinking?

• It is too cold.

• It contains too many minerals.

• It is too hot.

• It is too clear.

Which of the following is NOT a source of freshwater?

• Rivers

• Lakes

• Groundwater

• Oceans

Why must water from lakes and rivers be purified before use?

• It is too cold.

• It contains impurities.

• It is too salty.

• It is too hot.

In which sector is water NOT used extensively?

• Electricity generation

• Industries

• Agriculture

• Space travel

How is water used in agriculture?

• To build fences

• To transport goods

• To irrigate fields

• To wash crops

What is a key feature of potable water?

• It is transparent.

• It is colorful.

• It is salty.

• It is solid.