Water Cycle and Freshwater Issues

What is true about the amount of water on Earth?

• The amount of water on Earth is constantly increasing.

• The amount of water on Earth is constantly decreasing.

• The amount of water on Earth has been circulating for millions of years.

• The amount of water on Earth is entirely new with each generation.

Why is most of the Earth's water not suitable for humans to drink directly?

• It is too cold.

• It is too salty.

• It is too deep underground.

• It is too polluted.

Which three processes are part of the water cycle that make ocean water drinkable?

• Evaporation, freezing, melting

• Condensation, boiling, precipitation

• Evaporation, condensation, precipitation

• Sublimation, deposition, runoff

What happens to ocean water during the process of evaporation in the water cycle?

• It freezes into ice, leaving salt behind.

• It turns into water vapor, leaving the salt behind.

• It becomes denser and sinks to the bottom.

• It mixes with freshwater, reducing its salinity.

Precipitation can return to Earth in what forms?

• Fog, mist, and dew

• Rain, sleet, snow, or hail

• Clouds, vapor, and humidity

• Rivers, lakes, and oceans

How is freshwater described in terms of its availability on Earth?

• An unlimited resource in an open system.

• A limited resource in a closed system.

• A renewable resource that is always abundant.

• A resource that is constantly being created.

Which human activities are mentioned as negatively impacting the availability of freshwater?

• Recycling, conservation, and purification.

• Polluting, damming, and overusing.

• Desalination, irrigation, and cloud seeding.

• Fishing, boating, and swimming.

Besides drinking, what are some other essential uses of water mentioned for people?

• Generating electricity, mining, and space travel.

• Growing crops, running toilets, and making things.

• Building dams, creating artificial lakes, and recreational activities.

• Scientific research, artistic endeavors, and transportation.

What is a major cause of water scarcity in California mentioned in the video?

• Excessive rainfall leading to floods.

• A prolonged drought and the Colorado River drying up.

• Too many new rivers being formed.

• Melting glaciers causing sea-level rise.

What is a significant consequence of water scarcity, particularly in regions like California and along the Colorado River?

• Increased biodiversity in aquatic ecosystems.

• Improved water quality due to less usage.

• Conflict and arguments over water allocation.

• A decrease in the global average temperature.