Science 6B L6-7

What percent of Earth’s total water is freshwater?

• 3%

• 15%
• 10%
• 5%

In what state of matter is most of Earth’s freshwater found?

• gas

   

• plasma

•  

  solid

   

• liquid

What process of the water cycle occurs when water turns to gas?

• evaporation

•  

  condensation

   

• runoff

   

• precipitation

What process is occurring when water melts from glaciers and flows down a mountain into a stream?

• precipitation

   

• runoff

   

• evaporation

   

• condensation

Where does the energy for the water cycle come from?

• the Sun

   

• water when it changes state

•  

  humans

   

• Earth's internal heat

Which phrase best describes cohesion?

• Water’s ability to “stick” to other substances.

   

• Water’s ability to dissolve many substances.

   

• Water’s ability to resist temperature change.

•  

  Water’s ability to “stick” to itself.

  
  

Which property of water helps plants to move water from the roots to leaves?

• density

   

• cohesion

• adhesion

   

• polarity

Why is water able to resist temperature changes?

• The molecule has no charges (nonpolar).

• Ice floats in water.

   

•  

  It has a high specific heat.

• It makes few hydrogen bonds.

Who lives in a watershed?

• only fish

•  

  all living things

   

• only plants

   

• only animals

What is erosion?

• when there is a change in elevation

   

• when water gets contaminated

•  

  when soil is moved and destroyed

  
  

•  

  when plants grow next to a river