1. major oceanic surface gyres are:
a) caused by global winds; b) large circular system of ocean surface currents;
c) affected by the coriolis effect; d) all of these; e) none of these

2. today we have a full moon with a specific type of tide. what kind of tide will we have approximately two weeks from today?
a) semi-diurnal tide; b) spring tide; c) neap tide; d) lunar tide; e) mixed tide

3. what is a tsunami? why do most of these occur in the pacific? (open question.)

Yasmin's teacher asks her to make a supersaturated saline solution. her teacher tells her that the solubility of the salt is 360 g/l at room temperature (25 °c). how can yasmin make a supersaturated saline solution? she can add 380 g of salt to 1 l of hot water (75 °c) and stir until all the salt dissolves. then, she can carefully cool the solution to room temperature (25 °c). she can add 360 g of salt to 1 l of room temperature water (25 °c) and stir the solution until all the salt dissolves. she can add 380 g of salt to 1 l of cold water (5 °c) and stir the solution until most of the salt dissolves. then, she can carefully heat the solution to room temperature (25 °c). she can add 380 g of salt to 1 l of room temperature water (25 °c) and let the solution sit for 24 hours, so the salt dissolves.