1) Which level of the ocean floor is home to the most marine life? a) Trench b) Ocean Floor c) Continental Slope d) Continental shelf 2) The Gulf Stream is caused by several factors. Three of the factors are listed below, and one is not a factor. Which factor below does NOT cause the Gulf Stream? a) Water temperature b) Wind Patterns c) Tides d) Salinity 3) Algae and other producers need a lot of sunlight. Most ocean algae would be found in the water - a) on the abyssal plain b) in an oceanic trench c) on the continental shelf d) beside the continental slope 4) Sailors long ago would catch the current off the coast of Virginia. This current would help them get to -  a) Europe b) Central America c) South America d) Southern Africa 5) A child built a sandcastle one afternoon. The next morning, he bought some of his friends to see it. He was sad to see that his castle was gone. What caused the castle to disappear? a) The moving currents in the water. b) The changing of water pressure. c) The salinity of the water. d) The changing of the tides 6) The most important reason that lakes and oceans have different types of animal life is that oceans have - a) sandy shores and bottoms b) water with more salt c) large waves at the edges d) a much larger surface area

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