Water Distribution, Ocean Topography and Atmosphere

Which source of freshwater is not easily available for human use?

• oceans
• freshwater lakes
• rivers
• icecaps/glaciers

Approximately what percent of the Earth is covered by water?

• 71%
• 29%
• 50%
• 97%

The amount of dissolved solids present in the water

• salinity
• chlorine
• nitrogen
• density

Most of the Earth's water is in

• salty oceans
• freshwater lakes
• freshwater ponds
• glaciers

Most of the Fresh water on Earth is

• in the ocean
• underground
• frozen
• in rivers

What happens to pressure as you go deeper into the ocean? 

• increases
• decreases
• stays the same
• doubles

Seawater is typically denser than freshwater due to seawater’s —

• Greater depth
• Lower freezing point
• Smaller mass
• Higher salinity

Why is the ice shelf floating?

• The ocean water is
  filled with vegetation
  that keeps
  the ice from sinking. 
• The ice is melting faster than it can sink
• The ice is warmer than the ocean water
• The ice is less dense than the ocean water.

When you are building a sand castle on the beach, what feature are you standing on? 

• abyssal plain
• continental shelf
• seamount
• continental rise

What is letter C pointing to? 

• abyssal plain
• seamount
• mid-ocean ridge
• continental shelf