The Oceans - Chapter 1: Coral Reefs and Atolls

Question 1

These are constructed primary from the calcarereous (calcite-rich) skeletal remains and secretions of something that shares a name and certain algae

Answer 1

Coral reefs

Question 2

What helps bind together the skeletons of many animals and plants in coral reefs?

Answer 2

limy secretions of algae

Question 3

What degree is best for the growth of reef building corals?

Answer 3

75 F

Question 4

What are two conditions unsuitable for coral reefs?

Answer 4

Sudden temp changes

Temps below 65F

Question 5

Reef builders require ______

Answer 5

clear sunlit water

Question 6

Coral islands

Answer 6

atolls

Question 7

Atolls consist of a continuous or broken ring of coral reef surround a ____

Answer 7

central lagoon

Question 8

Describe Darwin’s 1831 hypothesis about coral reefs/atolls

Answer 8

Coral reefs form on the flanks of sinking volcanic islands. As an island sinks, the coral continues to build the reef complex upward

Question 9

Atolls (like guyots) owe their existence to the ____ of oceanic crust

Answer 9

Gradual sinking