Water Pollution and Aquatic Life

The video discusses the importance of water, highlighting its role in biological processes and the limited availability of freshwater. It explains water pollution, its causes, and its detrimental effects on aquatic life, including the impact of temperature changes due to industrial activities. The video concludes with a summary of the discussed topics.

What is the primary reason that only a small portion of Earth's water is suitable for drinking?

• Most water is polluted.

• Most water is saline.

• Most water is underground.

• Most water is locked in glaciers.

Why is water essential for cellular processes?

• It provides energy.

• It helps in cell division.

• It acts as a medium for chemical reactions.

• It is a source of nutrients.

Why can't living organisms use saline water?

• It lacks nutrients.

• It contains harmful bacteria.

• Their bodies cannot handle high salt levels.

• It is too cold.

What is water pollution?

• The natural purification of water.

• The evaporation of water from lakes.

• The freezing of water in polar regions.

• The addition of harmful substances to water bodies.

Which of the following is a major cause of water pollution?

• Agricultural runoff

• Water conservation

• Evaporation

• Natural disasters

How do fertilizers and pesticides contribute to water pollution?

• They are absorbed by plants.

• They decompose in the soil.

• They evaporate into the atmosphere.

• They wash off into water bodies.

What is a consequence of reduced oxygen levels in water due to pollution?

• Enhanced plant growth

• Increased fish population

• Death of aquatic plants and animals

• Improved water clarity

What effect does hot wastewater from industries have on aquatic life?

• It increases oxygen levels.

• It promotes algae growth.

• It stabilizes water temperature.

• It can be lethal to aquatic organisms.

Why is a sudden increase in water temperature dangerous for aquatic life?

• It causes water to freeze.

• It leads to oxygen depletion.

• It accelerates plant growth.

• It causes eggs and larvae to die.

What happens to aquatic life when the temperature of water bodies changes suddenly?

• They become more active.

• They migrate to other areas.

• They adapt quickly.

• They may die due to stress.