q

The figure below shows how water is distributed on Earth.Which of the following contains the largest percentage of Earth’s fresh water?

• lakes
• groundwater
• glaciers and ice caps
• ground ice and permafrost
  

During a portion of the water cycle, water falls to Earth’s surface as precipitation. Some of this water runs off into channels and keeps moving until it ends up in the ocean. Which best describes the water in the channels?

• lake
• river
• aquifer
• wetland
  

Which two statements in the table are true about the changing salt concentrations of ocean water?
 1 When Earth’s ice increases, ocean water gets saltier. 
2 When Earth’s ice increases, ocean water gets less salty. 
3 When ocean water evaporates, the water gets saltier. 
4 When ocean water evaporates, the water gets less salty.

• 1 and 3
• 1 and 4
• 2 and 3
• 2 and 4
  

Which of the following contains most of the water on Earth?

• the oceans
• watersheds
• the atmosphere
• ice and aquifers
  

Which is Earth’s largest source of drinkable water?

• lakes
• rivers
• oceans
• aquifers