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.)

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.