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Coral Reefs

Total questions: 20

Worksheet time: 15mins

Name
Class
Date
1.

What are coral reefs often compared to?

a)

forests

b)

gardens

c)

rainforests

d)

deserts

2.

What percentage of the ocean's sea life lives in coral reefs?

a)

10 -15%

b)

20%

c)

45%

d)

25%

3.

Coral reefs are endangered by

a)

climate change

b)

overfishing

c)

pollution

d)

all of the above

4.

What is one way scientists trying to save the coral reefs?

a)

by growing coral and planting it in the ocean

b)

by restricting access to reefs

c)

by adding new species of fish to the reefs

d)

by adding fertilizer to the coral reefs

5.

Which of the following is NOT a type of coral reef?

a)

Fringing reefs

b)

Barrier reefs

c)

Atolls

d)

Crustacean

6.
Where is the Great Barrier Reef located?
a)
Puerto Rico
b)
Florida
c)
Indonisia
d)
Australia
7.
A ringed shaped reef
a)
fringing reef
b)
barrier reef
c)
atoll
d)
archipelago 
8.
Coral reef is an animal
a)
false
b)
true
9.
A coral reef provides ________ for small fish.
a)
food
b)
shelter
c)
friends
10.
Coral reefs are found all over the oceans.
a)
true
b)
false
11.
What type of water does coral prefer?
a)
Warm
b)
Cold
12.
Why does coral require clear water to grow?
a)
For chemosynthesis
b)
For predation
c)
For autotroph
d)
For photosynthesis
13.
Which type of coral reef forms along the shoreline?
a)
Fringing
b)
Barrier
c)
Atoll
d)
Soft Coral
14.
What type of coral reef forms a lagoon?
a)
Fringing
b)
Barrier
c)
Atoll
d)
Soft Coral
15.
Who causes the most damage to coral reefs?
a)
Whales
b)
Fish
c)
Boats
d)
Humans
16.
What is a tiny individual coral animal?
a)
Polyps
b)
Crevice
c)
Atolls
d)
Erosion
17.

Coral polyps secrete what mineral?

a)

carbon calciate

b)

calcium carbonate

c)

calcium hydroxide

d)

carbon hydroxide

18.

What is coral bleaching?

a)

when the coral gets sick and loses its color

b)

when the coral dies

c)

the zooxanthellae is expelled and the coral turns white

d)

when the coral turns white during spawning

19.
What type of water does coral prefer?
a)
Deep
b)
Shallow
20.
What type of coral reef began as a volcanic island until the island sank?
a)
Frining
b)
Barrier
c)
Atoll
d)
Soft Coral

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