Geologic time

Question 1

Describe the difference between relative and numerical age.

Answer 1

RELATIVE AGE: AGE of things in SEQUENCE.

NUMERICAL AGE: ELAPSED TIME between EVENT and PRESENT.

Question 2

Describe and use principle of fossil succession.

Answer 2

FOSSIL SUCCESSION: Fossils are in order, once species goes extinct, it CANNOT reappear in YOUNGER ROCKS.

Question 3

Half life, daughter and parent isotope etc.

Explain how absolute dating works.

Answer 3

PARENT ISOTOPE: RADIOACTIVE ISOTOPE
DAUGHTER ISOTOPE: DECAYED version of PARENT ISOTOPE.
HALF LIFE: ISOTOPE DECAYS by HALF, instead of 4 you have SIX.