Hydrosphere Quiz Practice

What percentage of Earth's water is salty?

• 25%

• 50%

• 75%

• 97%

What percentage of fresh water is ice?

• 50%

• 1%

• 20%

• 79%

Which watershed are we currently in?

• Ohio River

• Great Lakes

• Cuyahoga River

• Mississippi River

32 mL of water is able to fit into 40 mL of gravel. What is the POROSITY of the gravel?

• 0.8

• 80%

• 1.25

• 125%

Answer explanation

Porosity = (volume of water/volume of material) x 100

Why are wetlands and estuaries important? Select all that apply.

• They have high biodiversity

• They have high photosynthetic rates

• They provide buffers for storms

• They provide water filtration

What is the term for all of the land area that supplies water to a particular river system?

• Recharge

• Tributary

• Watershed

• Aquifer

What is the term for the ability for water to move through a rock layer?

• Infiltration

• Saturation

• Permeability

• Porosity

In which aquifer would you want your well drilled in your future home?

• An unconfined aquifer

• A confined aquifer

• A perched aquifer

• An artesian aquifer

Which of the following is true regarding groundwater in most areas of the United States today?

• Discharge = recharge

• Discharge < recharge

• Discharge > recharge

• Discharge is slowly reducing

Where did the water on Earth probably originate from?

• Organisms

• Comets

• Volcanoes

• Rocks