Who is like, crazy good with Chemistry because I have 2 questions that I am so freaking stuck on! PLEASE HELP!

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Identify the electromagnets with poles that are reversed from the electromagnet shown above