J.R. S. answered 04/22/19
Ph.D. University Professor with 10+ years Tutoring Experience
Reduction takes place at the cathode (red cat)
Oxidation takes place at the anode
For any given galvanic cell, we need to decide which is being reduced and which is being oxidized. This can be determined by looking at standard reduction potentials of the half cells in question. Here, from the table at wikipedia, we have...
Zn2+ + 2e- ==> Zn(s) Eº = −0.7628
Cu2+ + 2e- ==> Cu(s) Eº = +0.337
So, copper (Cu) will be the cathode and zinc (Zn) will be the anode.