The coral reefs' _____ colors come from the corals
dull
brilliant
dark
white
1,000,000,000,000 =
a google
a million
a trillion
a billion
Coral reefs are _____ when people take coral from the reef to make things.
protected
built up
damaged
helped
_________ means taking care of nature, like coral reefs, so they stay healthy and happy.
Aquariums
Construction
Pollution
Conservation
Coral reefs need our help to stay healthy, so we should be kind to the ocean and ______ trash into it.
sometimes throw
not throw
always throw
Most coral reefs are found in warm, shallow ______.
bathtubs
oceans
lakes
pools
A tank or building where sea animals are kept is an ____.
museum
library
aquarium
courthouse
Some fishing methods have ____ effects on reefs.
illegal
hungry
friendly
negative
Coral reefs _____ a small 25% of ocean life.
lose
occupy
construct
swim
Limestone was used to construct ________;
my house
The Great Wall of China
The Statue of Liberty
The Great Pyramids of Egypt
Global warming has caused many reefs to become ____.
sick
healthy
better
bigger
Reefs are built by _____, tiny, soft-bodied animals related to jeyllyfish.
starfish
sea horses
coral polyps
fish
The greatest limestone structures are _____.
pyramids
churches
castles
coral reefs
Coral reefs are like colorful underwater ______ where many different animals and plants live.
cities
holes
games
clouds
When coral polyps die, they leave behind a material called ______.
clay
brick
limestone
marble
If we take care of reefs, they can _____ or come back.
break
rebuild
die
tear down
Coral reefs are ______ because they have bright and brilliant colors.
remarkable
boring
the same
Cyanide fishing releases liquid cyanide, a deadly _____, into the reef.
robot
chemical
hook
fishing pole
Coral reefs like to live in _____ waters, which means they are not too deep.
dirty
shallow
polluted
deep
Many different animals ____ coral reefs.
kill
forget
leave
occupy