What is true about a rock layer deposited on top of another rock layer?
a- it is older than the rock below

b- it is younger than the rock below.

c- it is the same age as the rock layer below

d- it is no different than the rock layer below

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?