Water

What part of the water cycle can carry pollutants from your yard to streams and rivers?

• evaporation
• runoff
• precipitation
• condensation

How much of the earth's water is freshwater?

• 50 %
• 3 %
• 97 %
• 93 %

The alternate rising and falling of the sea is called a what?

• river
• estuary
• tide
• wave

What is transpiration?

• process that removes salt from seawater
• process by which moisture is carried through plants
• the contamination of bodies of water

When water is attracted to other substances, this property is 

• Adhesion
• Cohesion
• Surface Tension
• Turbidity  

Sightly salty, as is the mixture of river water and seawater in estuaries 

• Food Web 
• Plankton 
• Benthos
• Brackish 

The variety of life in the world or in a particular habitat or ecosystem 

• Brackish
• Nekton
• Biodiversity
• Salinity 

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

A water strider can skate along the top of a pond because:

• covalent bonds result in water cohesion
• hydrogen bonds result in water cohesion (surface tension)
• water striders have adapted to take advantage of water cohesion
• low surface tension of water

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.

• adhesion
• capillary action
• cohesion
• surface tension