Ocean Topography and Currents

1. From the diagram, which under sea feature extends across most of the ocean floor?

• submarine canyons
• continental shelf
• abyssal plain
• continental slope

2. Which feature of the ocean floor could be described as an underwater mountain range?

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

3. Water currents in the ocean curve because of __________.

• wind
• the Coriolis effect
• the Sun
• upwellings

4. The portion of a landmass that extends out from the coast under the ocean is called a continental _____.

• edge
• slope
• shelf
• plate

5. Ocean water differs from freshwater in that it has __________

• a lower temperature
• a higher temperature
• a higher concentration of silicon dioxide(quartz)
• a higher concentration of sodium chloride(saline)

6. The salts in the sea come from _____.

• acid rain
• particles falling from space
• organisms that live in the sea
• weathering and erosion of rocks

7. Which of these decreases as a submarine dives deeper into the ocean?

• The water temperature
• The freshness of the water
• The number of plants in the water

8. Which natural force creates surface ocean currents?

• wind
• gravity
• sunlight
• earthquakes

9. What is the difference between a volcanic island & a seamount?

• A volcanic island rises above the water & a seamount does not
• A seamount rises above the water & a volcanic island does not
• Both the seamount & volcanic island are underwater
• Both the seamount & the volcanic island rise above the water

10. The continental slope is located at the end of the...

• continental shelf
• shoreline
• mid ocean ridge
• abyssal plain