Older rocks are at the bottom and younger rocks are at the top.  A person is digging up rocks, and wants to get the newest ones. The person will dig deeper or shallower?
shallower

The upper rock layers are much younger.  Rich was examining a cliff face. Which part of the cliff is older, geologically speaking the base or the top?
the base

The more branching there is in isomers, the lower the boiling and melting points are.  If an isomer has more branching than another isomer, it should have a higher or lower melting point?

lower