Why do most scientists believe that life started in the oceans?
			A: more animals live in water than on land. B: the oldest fossils ever found prove this. C: scientists like to scuba dive.
		How are ocean tides created?
			A: by the pull of gravity from the sun. B: by the pull of gravity from the moon. C: both of the above.
		What's an ecosystem?
			A: a system that scientists use to organize their field notes. B: a system that animals use to look after their young. C: a community of organisms that depend on each other and their surroundings.
		Where can you find the greatest diversity of life on Earth?
			A: on land. B: in the oceans. C: in your bathroom.
		What is plankton?
			A: microscopic animals and algae that live in the ocean. B: pieces of dead wood that float down rivers to the ocean. C: ocean plants that sink in heavy storms.
		What is the biggest animal that ever lived?
			A: king kong. B: tyrannosaurus rex. C: the blue whale.
		What is bioluminescence?
			A: the sunlight that penetrates through the trees in a rain forest. B: glowing lights on animals' bodies. C: the secret ingredient in chocolate chip cookies.
		Where can you find 80 percent of all ocean life?
			A: in the deep sea. B: in florida. C: on the continental shelves.
		Below 2,000 feet, the ocean is
			A: completely frozen over. B: completely dark. C: full of seaweeds.
		The biggest threat to the oceans is
			A: human beings. B: killer whales. C: killer bees.