Water Systems

Which part of the water cycle is occuring when warm, moist air cools and begins forming clouds?

• condensation
• evaporation
• precipitation
• transpiration

Which term best describes how plants release water in the form of water vapor?

• evaporation
• precipitation
• transpiration
• condensation

Which term best describes the flow of water over land?

• runoff
• precipitation
• transpiration
• condensation

What is the water that fills the cracks and spaces in underground soil?

• groundwater
• reservoir
• watershed
• irrigation

How much of of water on Earth is salt water in oceans and salt lakes?

• 3%
• 69%
• 26%
• 97%

How much of the water on Earth is considered fresh water?

• 97%
• 10%
• 3%
• 5%

What is the continuous process by which water moves from the Earth's surface to the atmosphere and back?

• evaporation
• photosynthesis
• eutrophication
• water cycle

What is the process where a liquid changes to a gas?

• condensation
• evaporation
• precipitation
• transpiration

What is it called when water falls back to Earth?

• condensation
• precipitation
• transpiration
• evaporation

About this much of Earth is covered in water...

• 3%
• 50%
• 70%
• 90%