P1B Oceans Review #2

Estimate the salinity of the ocean surface at the equator as shown on the graph.

• 0
• 38 - 40
• 34.5
• 10.5

Why is the ocean salinity at the equator lower than that of the Tropics (23.5 North and South)?

• Precipitation is lower at the Tropics
• Precipitation is lower at the equator
• The Trade Winds blow at the equator
• There is a lack of wind at the Tropics

Where is the salinity the lowest?

• On the surface
• At the bottom
• Between 0 and 10 m down
• Between 500 - 700 m down

Identify B on the sketch

• Guyot
• Volcanic island
• Seamount
• Coral reef

The diagram shows the sea temperatures in the South Pacific. During which season are the highest temperatures experienced?

• summer
• winter
• fall
• spring

Why are there more corals on east coasts than west coasts?

• The sun rises in the east and heats up east coasts more.
• There are less pollution on east-coasts
• West coasts often have cold ocean currents
• It is part of the Bermuda Triangle mystery

What percentage of mangrove forests has already been destroyed in the world?

• 90%
• 50%
• 30%
• 10%

Which of the following is NOT a factor needed for dune formation?

• Offshore winds
• Supply of sand
• Sandy beaches
• Vegetation such as grass

What is the area between high and low tide called?

• dunes
• offshore
• foreshore
• unshore

Where will you find this type of coastline?

• Retreating coastlines
• Tourist hotspots
• Advancing coastlines
• Volcanic islands