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Worksheets6.3 - Coral Reef Dynamics
Total questions: 10
Worksheet time: 16mins
Select the letter that identifies the Reef Front or slope
A
B
C
D
Select the letter that identifies the Reef Crest
A
B
C
D
Constructive forces on a coral reef include
Coral growth (secreting Calcium Carbonate)
Parrotfish Grazing
Boring clams and sponges
Ocean acidification
This picture shows a parrotfish biting a portion of coral to get the zooxanthellae. This is a form of
weathering
Bioerosion
Mechanical Erosion
Deposition
Overall reef erosion occurs when
The rate of growth is more than the rate of erosion of coral skeletons
The rate of growth is less than the rate of erosion of coral skeletons
The rate of growth is equal to the rate of erosion of coral skeletons
Based on the graph provided, What occurs to the coral growth rate as acidity increases?
Growth rate increases
Growth rate decreases
Growth rate remains the same
What does increased carbon dioxide levels in the atmosphere have on the chemistry of the ocean?
Increases dissolved oxygen
Decreases pH
Decreases Salinity
Decreases temperature
Which of the following situations might cause coral bleaching
above normal temperatures
below normal temperatures
elevated Carbon dioxide levels
decreased carbon dioxide levels
Coral bleaching occurs when
calcium carbonate is secreted
bleach is used to whiten corals
zooxanthellae are expelled from the coral
coral is exposed to the atmosphere
Human caused threats to coral reefs include
boat collisions
fishing practices that remove large numbers of grazing species
nutrient rich run-off from coastal communities
all of the above
