Coral reefs

Corals are

• tiny plant organisms that live in clear ocean waters

• colourful calcium carbonate marine rock formations

• small marine animal organisms

• none of the above

What is the relationship between corals and zooxanthellae?

• zooxanthellae grow on the corals and protect them from extreme sunlight

• corals provide food for zooxanthellae when they photosynthesize

• zooxanthellae grow at the expense of the corals

• corals receive their energy from the zooxanthellae

Corals seem to grow best in

• cool, clear and calm waters

• warm, shallow salt water in high wave energy areas

• warm, clear, nutrient rich waters of the ocean

• clear, clean fresh waters of the tropics

Atoll reefs can be found in

• Australia, Tobago and Barbados

• Antigua, Belize and St. Lucia

• Belize, Bahamas and Hawaii

• Australia, Antigua and Bermuda

Which type of reef is separated from the shore by a narrow, shallow lagoon?

• Fringing

• Barrier

• Atoll

• Patch

Which reef is shown above?

• The Belizean Reef

• The Bucco Reef

• The Bahamas Reef

• The Australian Reef

Coral reefs provide all of the following benefits EXCEPT

• Protection against storm waves

• Medicinal substances for the pharmaceutical industry

• Materials for paper manufacturing

• A source of food and livelihood

Coral reefs provide habitats for _______ of marine inhabitants.

• 30%

• 50%

• 80%

• 25%

Which threat to coral reefs is associated with the sewage run-off into the ocean?

• Algal bloom

• Sedimentation

• Ocean acidification

• Coral bleaching

Which of the following actions are LEAST LIKELY to protect coral reefs

• Creating artificial reefs to protect coasts

• Reducing the use of plastic products

• Avoiding walking on coral reefs

• Legislation to make coral reefs protected areas