the relative age of rocks

Question 0

absolute age

Answer 0

number of years since a rock formed

Question 1

relative age

Answer 1

rocks age compared to ages of others rock

Question 2

law of superposition

Answer 2

a method to find the rocks related age

Question 3

extusion

Answer 3

lava that hardens on the surface

Question 4

intrusion

Answer 4

magma cools and hardens into a mass of igneous rock

Question 5

fault

Answer 5

a break in earths crust

Question 6

unconformity

Answer 6

the surface where new rock layers meet a much older rock surface beneath them

Question 7

index fossil

Answer 7

help geologists match rock layers