The map here shows South America and the surrounding oceans. Recall that
the Mid-Atlantic Ridge is located east of
South America. Can you find an ocean
trench? As a class, use these features to
infer the motion of the plates. Next, take
a close look at the continent. Discuss
what might explain why the west coast
has mountains while the east coast is
more flat.

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.