This is the percentage of coral reefs that are threatened.
What is 75%?
100
This reef can be seen from space.
What is the Great Barrier Reef off of Australia?
100
This is the effect cold water has on a coral reef.
What is lower reproduction?
100
This is an area of freshwater that runs into an ocean.
What is an estuary?
200
This term describes when an entire colony branches off to form a new colony.
What is fragmentation?
200
This is the number of reef systems that make up the Great Barrier Reef.
What is 3000?
200
Ningaloo Reef is an example of this type of reef.
What is a fringing reef?
200
This is the effect warm water has on a coral reef.
What is bleaching?
200
This word means reef-building.
What is hermatypic?
300
This is the term for reproductive cells of coral.
What is gametes?
300
These are the numbers of tentacles that soft and stony coral polyps have.
What are multiples of 8 (soft) and multiples of 6 (stony)?
300
Besides the Great Barrier Reef, this one is another barrier reef.
What is the Belize Barrier Reef?
300
These are two causes for reef fragmentation.
What are storms or boat damage?
300
This is the class to which polyps belong.
What is Anthozoa?
400
Waste or debris on a coral reef is known as this.
What is detritus?
400
This is the range of water temperature that is necessary for a healthy coral reef.
What is 77-84 degrees F?
400
Ari, the reef by Maldives in the Indian Ocean, is an example of this type of reef.
What is an atoll reef?
400
This is the effect of murky water on coral reefs.
What is the inability of algae to complete photosynthesis?
400
This is the difference between corallites and sclerites.
What is corallites are hard calcium carbonate cupped skeletons and sclerites are thin, spiny pieces of calcium carbonate?
500
These are the two ways that coral reproduce asexually.
What are budding and fragmentation?
500
This is the depth of water that promotes a healthy coral reef.
What is less than 230 feet?
500
This is how the three types of reefs are different.
What is fringing - attached, atoll - continuous reef encircling a lagoon, and barrier - separated from the mainland by a channel?
500
This is the effect that sediment has on coral reefs.
What is the slowing or stopping of growth due to the fact that coral can't feed or respirate?
500
Since coral provide a safe environment, carbon dioxide, and nutrients for algae and algae help coral remove waste and provide oxygen and nutrients, their relationship is known as this.