Marine Science Unit 3

Identify which factors limit the distribution of coral reefs.

• Temperature, Light, Nutrients, Turbidity

• Temperature, Light, Nutrients, Salinity

• Turbidity, Light, Nutrients, Salinity

• Temperature, Light, Turbidity, Salinity

TRUE or FALSE: Substrate availability influences presence of corals over time

• TRUE

• FALSE

The specific form of Calcium carbonate used by corals to form their skeleton is called:

• Calcite

• Vaterite

• Carbide

• Aragonite

Identify a conclusion that can be drawn from the figure above.

• Calcification increases as the aragonite saturation state increases

• Calcification decreases as atmospheric Carbon dioxide increases

• There is no relationship between aragonite saturation state and calcification rates

• There is a strong correlation between calcification rates and aragonite saturation levels.

How many years ago did corals appear in Australian waters? (enter the number only)

Formation of the Great Barrier Reef stabilised ______ years BP.

Coral reefs first appeared in the geological record:

• 6500 Years Ago

• 20 000 Years Ago

• 250 MYA

• 240 MYA

Identify the possible types of reef structures from the list below:

• Tabletop

• Platform

• Fringing

• Edge

• Ribbon

The reef shown in the figure above is known as a __________ reef.

Identify which is TRUE for fringing reefs:

• They form directly from the shore

• They are characterised by a deep lagoon region in between the shoreline and reef edge

• They are susceptible to offshore runoff and pollution

• The are formed as a result of volcanic activity