Approximately what percent of Earth's water is fresh water?

• 70%
• 3%
• 30%
• 50%

Water that falls to Earth as rain, sleet, snow, or hail is known as .....

• evaporation 
• condensation
• precipitation
• runoff

All the water on Earth is...

• staying the same
• decreasing
• increasing

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

• rainwater
• evaporation
• transpiration
• groundwater

A river system is made up of a river and its ...

• tributaries
• runoff
• divides

What are the streams and small rivers that feed into the main river called?

• runoff
• watersheds
• divides
• tributaries

the water in lakes and ponds is ...

• moving
• still
• deep

A lake that stores water for human use is a _______________

• reservoir
• tributary
• dam
• crater lake

Water moves slowly through wetlands.  Some waste is absorbed and settles in the wetland.  Wetlands act as natural _________________.

• habitats
• filters
• tributaries
• marshes 

The Florida Everglades are best described as a ....

• reservoir 
• bog
• swamp
• A fresh water marsh