Can someone plz help me with question 1,3,4

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian