Water Cycle and Freshwater Quiz

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List three common uses of water.

To drink, for food, and for cleaning.

What percentage of the planet's water is fresh water?

3%.

What is the main reason that water isn't consumed entirely?

The water cycle.

Name one factor that affects the water cycle.

Atmosphere. Signup and view all the answers

What does the lithosphere represent in the water cycle?

All solid material on the planet that contains water. Signup and view all the answers

What is a basin in the context of hydrographic networks?

A basin is the geographic area that supplies water to a river, stream, lake, or ocean. Signup and view all the answers

How does temperature influence dissolved oxygen levels in water?

Cooler water holds more dissolved oxygen, which benefits aquatic life. Signup and view all the answers

What role do divides play in hydrographic networks?

Divides are lines that separate water flowing to different bodies, such as mountains and ridges. Signup and view all the answers

What are sub-networks in relation to larger freshwater networks?

Sub-networks are smaller networks that exist within larger hydrographic networks. Signup and view all the answers

How does salinity affect aquatic organisms?

Salinity determines organisms' ability to survive, impacting dissolved oxygen and quality of life in water. Signup and view all the answers

What is salinity, and how does it differ between seawater and freshwater?

Salinity is the amount of dissolved salt in water. Seawater has a salinity about 200 times higher than freshwater. Signup and view all the answers

What is groundwater, and how does it collect?

Groundwater is water that penetrates the soil and collects in an underground layer, flowing and accumulating until it reaches a point of emergence. Signup and view all the answers

What is the approximate density of seawater compared to freshwater?

Seawater has a density of approximately 1.025 g/mL, while freshwater has a density of about 1.00 g/mL. Signup and view all the answers

At what temperature does seawater freeze, and how does this compare to freshwater?

Seawater freezes at about -1.9°C, while freshwater freezes at 0°C. Signup and view all the answers

Define an Ice Age and state when the last Ice Age occurred.

An Ice Age is a period when glaciers are most widespread on Earth, and the last Ice Age started about 170,000 years ago and ended around 11,000 years ago. Signup and view all the answers

Why is understanding the differences between seawater and freshwater important?

Understanding these differences is crucial for marine biology, environmental science, and climate studies. Signup and view all the answers

What percentage of the Earth's landmass was covered by glaciers during the last Ice Age?

During the last Ice Age, glaciers covered roughly 28% of the Earth's landmass. Signup and view all the answers

What is one consequence of the higher salinity in seawater?

One consequence is that it makes seawater denser, affecting buoyancy and marine life adaptations. Signup and view all the answers

How much has the average global temperature risen over the last century?

The average global temperature has risen by 0.5°C over the last 100 years. Signup and view all the answers

What trend is observed regarding glacier melt in recent years?

Glaciers are melting at a faster rate than in previous years. Signup and view all the answers

Water Cycle

The process where water constantly changes states between liquid, gas/vapor, and solid, driven by evaporation and condensation.

Water Vapor

The gaseous state of water in the atmosphere, playing a crucial role in the water cycle.