The San Andreas fault in California is thought to be a boundary ...

[Arii_bell]

The San Andreas fault in California is thought to be a boundary of two plates
 a. that are separating from one another.
  b. where one is pushing over the top of the other.
  c. that are sliding horizontally past one another.
  d. that are basically at rest.

Question 2

How many shells in an atom of silicon contain electrons?
 a. 3
  b. 2
  c. 5
  d. 4

[zhanghao]

Answer to Question 1

c

Answer to Question 2

a

[Arii_bell]

Excellent

[alexanderhamilton]

Thanks for the timely response, appreciate it