dating rocks and fossil succession

Question 1

what is deep time

Answer 1

earth is very old, geologic time is vast

Question 2

what is relative dating

Answer 2

the order of deposition of rocks based on their position

Question 3

what are the different way relative dating is done

Answer 3

Lithostratigraphy
biostratigraphy
chemostratigraphy

Question 4

what is lithostratigraphic correlation

Answer 4

correlation based on rock types and sequences

Question 5

what is the principle of fossil succession

Answer 5

vertical order of fossils in geologic record

ages of fossils are determined using superposition

Question 6

what is an Index fossil/guide fossil?

Answer 6

any easily identified fossil with a wide geologic range

Question 7

what is absolute dating

Answer 7

a number representing the time a body of rock was deposited

Question 8

how is absolute dating done

Answer 8

Radiometric dating

Question 9

what is radioactive decay

Answer 9

-the radioactive particles that are locked in igneous rock when its cooling

Question 10

what is isotopic dating

Answer 10

radioactive isotopes decaying at constant exponential rate

–after crystallization parent isotopes start to decay, which produces daughter isotopes

• the amount of decay, gives when the rock was formed

Question 11

what is a half-life

Answer 11

the interval of time for half of parent isotopes to decay

Question 12

what is the half-life of Radiocarbon dating

Answer 12

5730 years

Question 13

what is the max age for radiocarbon dating

Answer 13

70,000 years

Question 14

what can radiocarbon dating be used for

Answer 14

bone, teeth, and wood

Question 15

what is lithostratigraphy

Answer 15

the study of rock layer

Question 16

what is chronostratigraphy

Answer 16

the combination of relative dating (lithostratigraphy and biostratigraphy) with radiometric dating methods