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WorksheetsCORAL REEFS
Total questions: 17
Worksheet time: 9mins
Most coral reefs are
in warm areas near the shore
in warm areas away from
the shore
in cold areas near the shore
in cold areas away from
the shore
A coral reef is made up of thousands of small structures called
sea stars
polyps
sea anemones
bacteria
A coral polyp is actually
an animal found in Phylum Cnidaria
an animal found in Phylum Chordata
a plant found in Phylum Bryophyta
a plant found in Phylum Aniospermophyta
Coral polyps are vertebrates.
TRUE
FALSE
What do polyps use to capture food
Calcium carbonate skeleton
Tentacles
Mouth
Zooxanthellae
Coral polyps build their homes out of
carbon dioxide
calcium carbonate
calcium manganese
carbon monoxide
What percentage of the ocean's sea life lives in coral reefs?
10 -15%
20%
45%
25%
What percentage of the ocean is taken up by coral reefs?
10-12 percent
25 percent
less than one percent
more than fifty percent
Zooxanthellae are plants.
TRUE
FALSE
Zooxanthellae carryout photosynthesis.
TRUR
FALSE
What role do zooxanthellae play in a coral reef?
They reduce the amount of carbon dioxide in the water.
They supply food for the corals.
They help the stony corals and soft corals live together.
They protect the corals from disease.
Polyps get most of their food from zooxanthellae.
TRUE
FALSE
Why must coral reefs be in shallow waters?
The zooxanthellae need to be
in cold water.
The zooxanthellae need to live far
from corals.
The zooxanthellae need sunlight
to grow.
The zooxanthellae need reefs to hide in.
The largest coral reef in the world is
Fiji Coral Reef
Raja Ampat, Indonesia
Florida Keys, Florida
The Great Barrier Reef, Australia
What are coral reefs often compared to?
forests
gardens
rainforests
deserts
Coral reefs are home to how many species?
thousands
billions
hundreds
millions
