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Coral Reefs

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

What conditions do corals grow under?

a)

Clear Waters

b)

Water with a lot of nutrients

c)

Water ranging from 20° Celsius to 32° Celsius

d)

Sunlight

2.

What are the global consequences? (Select all that apply)

a)

economic

b)

social

c)

health

d)

political

3.

4.What do coral reefs provide ? Select all that apply.

a)

habitat for the fish we eat

b)

coastal protection during severe weather

c)

compound for the medicine we take

d)

barrier against pollution

4.

6.Corals prefer clear shallow waters because they need sunlight to grow.

a)

True

b)

False

5.

A "habitat" is a place where _____. (line 11)

a)

people fish

b)

animals or plants naturally live

c)

animals or plants are few

6.

Coral reefs help protect coasts by _____.

a)

absorbing pollution

b)

releasing important chemicals

c)

slowing down waves

7.

7.Where can you find coral reefs around the world?

a)

warmer water near the equator

b)

cooler climate near the poles

c)

Moderate climates

d)

Arctic climate

8.

________ of different plants and animals live on a single reef.

a)
b)
c)
9.

3.Symbiosis happens when the two different organisms live together and interact in some way.

a)

True

b)

False

10.

Sharks are a common animal that live in coral reefs.

a)

True

b)

False

11.

Coral reefs are referred to as "underwater forests."

a)

True

b)

False

12.

The helpful algae give coral their _____.

a)

colour

b)

hardness

c)

size

13.

How are coral reefs formed?

a)

when fringing reefs are formed

b)

when free-swimming coral larvae attach to submerged rocks

c)

when limestone start to produce calcium carbonate

d)

when the chicken lays eggs

14.

About _____ percent of the world's coral reefs have died.

a)

20

b)

50

c)

80

15.

Coral are animals.

a)

True

b)

False