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Name _________________________________
Earth System Science Quiz 11/9/07
1. Which of the following are characteristics of passive continental margins?
a) frequent earthquakes
c) a wide continental shelf
b) frequent volcanic eruptions
d) location far from a plate boundary
2. Is the continental margin shown below an active or a passive continental margin?
Passive margin
3. What are the two ways in which the properties (not location) of the surface mixed zone
and deep zone of ocean water (below) are different?
1. Temperature
2. Density or salinity (I will accept either)
4. Why is “deep zone” water present at the ocean surface in the Arctic and Antarctic?
Deep zone water is formed at the surface in the Arctic and Antarctic, when sea ice
freezes and leaves behind cold, salty water that sinks to the bottom of the ocean.
5. Where does the salt in the oceans come from originally, and how is it concentrated?
Name _________________________________
It originally comes from chemical weathering of rocks, is carried to the oceans in the
dissolved load of rivers, and is concentrated by removal of water (mostly through
evaporation, and partly through freezing).