Coral reefs

Question 1

Conditions needed for Corals

Answer 1

30 degrees north or south of the equator.

Needs a good amount of sunlight.

Waves for oxygen.

Require salt water environment.

Question 2

Fringing reefs

Answer 2

Grows quickly in shallow water.

Develops on outer edges of the land around islands.

Question 3

Bearier reef

Answer 3

Grow on the edge of the continental shelves, often some distance from the shore.

Separated from mainland by the lagoons that are often deep and wide. eg the great Beaver reef. aprx ( 2000km)

Question 4

Atoll

Answer 4

Mainly in the pacific, some in the Indian ocean.

Made entirely from atolls.

Circular or Oval and enclosed of Lagoon

Question 5

Importance of reefs

Answer 5

Protect coastlines from erosion

Forms barrier against tropical storms and tsunamis.

Tourist attraction ( Great barrier reef)

Fishing areas

Question 6

Threats to reefs

Answer 6

Tourism_ anchors,

people touching coral

Pollution from boats, tankers.