CORAL REEFS

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Give an adjective that may describe the coral reef.

What do you think is the importance of having coral reefs?

oHave you seen a coral reef?

Sample pictures of corals

Healthy

corals!

Coral Reefs

Are made of corals which are marine

organisms from the Phylum Cnidaria, and

exist as small sea anemone-like

polypes typically in colonies of many

identical individuals.

Types of Coral Reefs

Barrier reefs

Platform

reef

Atolls Fringe reefs

next

A ring-shaped reef that grows around the rim of a dead underwater volcano.

Atolls

Next!

Fringed reefs

Grow along the borders of

islands and continents.

Next!

Grow in patches behind barrier reefs with flat

upper surface.

Platform reefs

Next!

Grow between a

landmas and continents.

Barrier reefs

Most Corals depend on sunlight, and grow in clear and shallow waters of not

more than 50 meters deep, at water temperature of at

least 20 degree Celsius. These corals make a major contribution to the physical structure of the coral reefs that develop in tropical and

subtropical waters.

Activity :Instruction : Name the four kinds of coral reefs. Write your answer on the given space.

1. 2.

3. 4.answer

Activity :Instruction : Name the four kinds of coral reefs. Write your answer on the given space.

1.Atolls

2.Fringed reef

3.Barrier reefs

4.Platform reef

Group Activity :

Instruction : Arrange the sentences on how coral reefs formed. Write numbers 1-4 on the blank provided.

Most corals depend on sunlight and grow in clear and shallow water. Coral reefs are made up of corals which are marine organisms from the phylum cnidaria and exist as small sea-anemone like polyps. Coral reefs are formed from the piling up of the skeletons of marine animals cemented together by living blue-green and red algae. Coral reefs grow in a water temperature of at least 20 degree Celsius. Answe

r:

Group Activity :

Instruction : Arrange the sentences on how coral reefs formed. Write numbers 1-4 on the blank provided.

2 Most corals depend on sunlight and grow in clear and shallow water. 1 Coral reefs are made up of corals which are marine organisms from the phylum cnidaria and exist as small sea-anemone like polyps. 4 Coral reefs are formed from the piling up of the skeletons of marine animals cemented together by living blue-green and red algae. 3 Coral reefs grow in a water temperature of at least 20 degree Celsius.

Assignment:1.READ and STUDY the article “Corals” by Lorda Dacoco Duremdez Naawan Central school, Naawan, Misamis Oriental.

2.How and why Coral Reefs are very important in underwater?