Coral Reefs

Between which lines of latitude are coral reefs located?

• 10°N and 10°S of the equator

• 20°N and 20°S of the equator

• 30°N and 30°S of the equator

• 40°N and 40°S of the equator

Where is the largest single reef system in the world?

• Southeast Asia

• Red sea

• Great Barrier Reef

• Caribbean belt

Between what temperatures can coral grow?

• 18°c-32°c

• 10°c-38°c

• 9°c-21°c

• 15°c-22°c

What is the ideal temperature for coral growth?

• 32°c-35°c

• 15°c-19°c

• 28°c-34°c

• 22°c-25°c

Up to what depth can coral grow?

• 20m

• 50m

• 70m

• 100m

Which type of reef? The reef is attached to the coastline and extends approximately 100m out to sea.

• Fringing

• Atoll

• Barrier

• Deep water

Which type of reef? The reef formed around a tropical island that has now disappeared.

• Fringing

• Atoll

• Barrier

• Deep water

How many people rely on coral reefs for their main source of protein?

• 2 million people

• 25 million people

• 250 million people

• 2500 million people

Coral reefs cover less than 1 percent of the ocean. What percentage of marine life live on coral reefs?

• 2%

• 7%

• 15%

• 25%

What happens when to reefs when ocean temperatures change too quickly?

• Coral bleaching

• Coral staining

• Coral colouring

• Coral tainting