marine science unit 3

coral reefs need abiotic conditions including

• high oxygen, good light availability, consistent salinity, low nitrated and phosphates

• high oxygen, good light availability, low salinity, low nitrated and phosphates

• high oxygen, good light availability, consistent salinity, high nitrated and phosphates

• low oxygen, good light availability, consistent salinity, low nitrated and phosphate

corals first appeared

• 6000 years ago

• 500000 years ago

• 200000 years ago

• 250 million years ago

The great barrier reef has been changes in sea levels 20 000 (BP). However stabilized __________ years BP.

• 6500

• 2000

• 60000

• 200000

What type of reef is this?

• Fringing reef

• Ribbon reef

• Barrier reef

• platform reef

What type of reef is this?

• Coral Cay

• Atoll

• platform

• fringing

• f

Which area is the lagoon?

• i

• ii

• iii

• iv

Which area is the back reef?

• i

• ii

• iii

• iv

Which area is the front reef/reef slope?

• i

• ii

• iii

• iv

hermatypic are what sort of coral

• soft coral

• hard coral

• reef forming coral

• non reef forming coral

scleractinia are

• soft coral

• hard coral

• reef forming coral

• non reef forming coral