Plankton

Question

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	it makes the water saltier.
	it kills large predators like sharks.
	it makes the water more acidic.

Question

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	algae
	zooplankton
	prokaryotes
	the ocean

Question

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	To see in the dark
	Just for fun
	To scare away predators
	To attract a mate

Question

All plankton are microscopic (too small to see without a microscope).

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	True
	False

Question

Zooplankton are tiny animals.

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	True
	False

Question

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	zooplankton
	phytoplankton
	eukaryotes
	prokaryotes

Question

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	drifting or wandering
	microscopic
	aquatic (water-living)
	plants

Question

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	A few dozen cells
	Hundreds of cells
	Thousands of cells
	Millions of cells