Understanding the Water Cycle

The video explains the water cycle, highlighting how water vapor from Earth's surface evaporates, forms clouds, and returns as precipitation. It describes the hydrosphere, the Sun's role in evaporation, and the balance of water in the ecosystem. The cycle is crucial for life, with water moving through runoff, infiltration, and groundwater storage, maintaining a constant balance.

What is the primary source of water vapor in the atmosphere?

• Underground springs

• Rainfall

• Earth's surface water

• Volcanoes

What happens to water vapor as it rises higher in the atmosphere?

• It condenses into clouds

• It evaporates further

• It disappears

• It turns into ice

What is the water cycle often compared to in the human body?

• Respiratory system

• Nervous system

• Digestive system

• Circulatory system

What role does the Sun play in the water cycle?

• It cools the water

• It freezes the water

• It absorbs water

• It provides energy for evaporation

What is the term for the total amount of water cycling around the Earth?

• Lithosphere

• Hydrosphere

• Biosphere

• Atmosphere

What is the term for water that flows across the Earth's surface?

• Condensation

• Evaporation

• Runoff

• Infiltration

How long can groundwater remain beneath the Earth's surface?

• A few hours

• A few months

• A few days to thousands of years

• A few weeks

What is the process called when water soaks into the ground?

• Infiltration

• Evaporation

• Precipitation

• Condensation

What percentage of the hydrosphere's water is contained in the oceans?

• 75%

• 50%

• 99%

• 97%

What ensures the balance of water in the hydrosphere?

• Constant rainfall

• Ocean currents

• Human intervention

• Evaporation and precipitation