The video discusses the importance of water as a natural resource, its uses in daily life, and the different types of water available on Earth. It highlights the significance of fresh water and the challenges in managing water resources for agriculture. The video also covers irrigation systems, the role of dams in water management, and the need for water conservation to prevent pollution and wastage.

Why is water considered an essential natural resource?

• It is used only for drinking.

• It is a part of all living organisms and daily activities.

• It is abundant and never needs conservation.

• It is only used in agriculture.

What percentage of Earth's water is fresh water?

• 25%

• 10%

• 50%

• 3%

Which type of water is primarily used for drinking and agriculture?

• Sea water

• Brackish water

• Polluted water

• Fresh water

What is the main source of water for irrigation in India?

• Imported water

• Desalination plants

• Monsoon rainfall

• Groundwater

How do canals help in irrigation?

• They direct rainwater to fields.

• They store water for future use.

• They prevent water from evaporating.

• They purify water for drinking.

What is a key function of dams besides irrigation?

• They reduce water temperature.

• They generate hydroelectricity.

• They desalinate sea water.

• They increase rainfall.

Which dam is known as the longest man-made dam in India?

• Hirakud Dam

• Tungabhadra Dam

• Bhakra Nangal Dam

• Nagarjuna Sagar Dam

What is the primary reason for water pollution?

• Natural disasters

• Toxic waste from factories

• Excessive rainfall

• Overuse of water in agriculture

What does recycling of water involve?

• Mixing fresh and sea water

• Reusing water for different purposes

• Storing water in open containers

• Using water only once

Why is it important to conserve water?

• Water is unlimited and always available.

• It is not important to conserve water.

• Conservation prevents wastage and ensures availability.

• Conservation increases water pollution.