Quiz
1. Buffering is
a) dissolution of calcium carbonate in acid
b) dissolution of CO2 in water
c) an increase in water temperature
d) any process that stabilizes pH, up to a point
2. CO2 dissolving in water forms
a) carbonic acid
b) calcium carbonate
c) a buffer
d) calcium hydroxide
3. When pH increases, a solution becomes
a) more acidic
b) less acidic
c) more buffered
d) more neutral
4. Ocean water pH is closest to
a) 6
b) 7
c) 8
d) 9
5. Which of these are best able to adopt to increasing acidity of ocean water?
a) lobsters
b) oysters
c) zooplankton
d) starfish
6. Coral reefs are most often found in
a) clear, shallow water
b) muddy, shallow water
c) clear, deep water
d) muddy, deep water
7. Which of these does not have a significant coral reef-based tourism and fishing industry?
a) Australia
b) Florida
c) Bahamas
d) England
8. Which of these is an acidic pH?
a) 6
b) 7
c) 8
d) 9
9. pH is a measure of
a) oxygen concentration in water
b) hydrogen ion concentration in water
c) concentration of suspended particles in water
d) calcium and magnesium ions in water
10. Which is false?
a) Modern coral reefs can be millions of years old.
b) Corals reefs are mostly organic carbon, and as such effectively store carbon dioxide from the atmosphere.
c) Coral reefs are among the most biologically diverse ecosystems on Earth.
d) Coral reefs are among the most endangered ecosystems on Earth.
11. Which of these is not made of calcium carbonate, which dissolves much faster in acidic water?
a) the stony part of corals
b) coral polyps
c) sea shells
d) Florida's bedrock
12. In the past 200 years, acidity of Earth's oceans increased by
a) 10%
b) 20%
c) 30%
d) 40%