CORAL REEF

1. 1. A coral reef, needs the water to be between ____________ to thrive

• A. 13ºC and 16ºC

• B. 23ºC and 26º C

• C. 33ºC and 36ºC

• D. 43ºC and 46ºC

Answer explanation

Optimal conditions for growth are between 23C and 25ºC

2. 2. Coral reef need to be near land because the:

• A. Beach sand is good for the reef.

• B. Coastal waters have fish

• C. Caostal breezes are nice

• D. Wave action brings food and oxygen

3. 3. Coral reefs need waves because they

• A. Keep sand from settling over anchored animals.

• B. Move the fish around

• C. Are good for surfing

• D. Wash food and oxygen away

Answer explanation

Generally prefer strong wave action which ensure oxygenated water and where there is a strong cleansing action.

4. 4. Fringing coral reefs:

• A. Run along a shoreline in shallow water.

• B. Run along continents

• C. Form small islands surrounding a lagoon.

• D. Run along the coast of Australia

6. 5. Coral reefs get its pretty colours from ________ zooxanthellae that lives in the coral tissue itself.

• A. a fungus

• B. an algae

• C. a bacteria

• D. a plankton

Answer explanation

The algae called zooxanthellae live within the coral's tissue.

6. 6. Coral reefs that forms small islands that surround a lagoon of water in the Indo-Pacific Ocean are called:

• A. Fringing reefs

• B. Barrier reefs

• 3. C. Atolls

• D. Ocean reefs

8. 7. Coral reefs are very sensitive and can be hurt by:

• A. anchoring on coral

• B. dumping polluted water or trash on it

• C. stepping on it

• D. all of the above

9. 8. Where is the Great Barrier Reef located?

• A. Puerto Rico

• B. Florida

• C. Indonesia

• D. Australia

7. 9. Coral captures food:

• A. With tentacles that sting.

• B. With sharp teeth

• C. By chasing it down

• D. By swimming in circles around it.

Answer explanation

Coral can catch small fish and plankton using stinging cells on their tentacles

10. 10. What is the hard structure that provides the foundation for the reefs?

• A. Limestone

• B. Sandstone

• C. Concrete

• D. Granite