.3$3&:?2$1?1$2,2)2(2722?1?172?272$2)2$282)2)2)2)2)/$:$3$3$3$3)4)373$2&1!2$3$3)4$:$3)28/7:7:74
protons, neutrons and electrons
Answer:
Check if the rock layer has fossils in it.
Explanation:
The rock layer from the inside out and the fossils will tell you how old the rock is.
