We always see the same side of the moon because choose one: a. the moon does not rotate on its axis. b. the moon rotates once each revolution. c. when the other side of the moon is facing toward us, it is unlit. d. when the other side of the moon is facing earth, it is on the opposite side of earth. e. none of the answer options are correct.

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom