1.4.1 Hot, Cold and Currents
Students will explore how changes in the salinity and temperature of water affects its density and motion.
Materials for each group of 3/4 students
In winter months, primary production in the Antarctic Ocean is nearly zero, which creates difficulty for the grazers who depend on primary production. But in the 5-6 months of austral spring and summer, these waters become a nutrient-rich pasture for plankton. The frigid polar waters teem with life. Part of the reason lies in the density and movement of the water column which is affected by temperature, salinity, changes in pressure (depth) and sediment suspension. We can illustrate how these factors work in some simple lab experiments.
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