Radiometric Dating

Question 1

Determines the sequence of events and their relative ages, but not their specific numerical age

Answer 1

Relative Dating

Question 2

A method used for sequencing rock layers, fossils, and geologic events

Answer 2

Relative Dating

Question 3

What are commonly used in Relative Dating?

Answer 3

Stratigraphy, Fossil Correlation, and the Principle of Cross-Cutting Relationships

Question 4

Compares the abundance of a radioactive isotope to its decay products

Answer 4

Absolute Dating

Question 5

Crucial for determining the age of archaeological and geological specimens

Answer 5

Absolute Dating

Question 6

The two methods of Radiometric Dating

Answer 6

Relative Dating and Absolute Dating

Question 7

What are the isotopes used in Absolute Dating?

Answer 7

C-14, K-40, U-238, U-235, Rb-87, and Th-232

Question 8

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

C-14

Answer 8

5 730; organic remains up to 50 000 years; N-14

Question 9

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

U-238

Answer 9

4.5 B; dating old rocks and minerals; Pb-206

Question 10

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

K-40

Answer 10

1.25 B; dating igneous rocks, ancient geological events such as formation of mountain ranges and crystal evolution; Ar-40

Question 11

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

Rb-87

Answer 11

49 B; extremely old, ancient rocks; Sr-87

Question 12

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

Th-232

Answer 12

14 B; geological processes; Pb-208

Question 13

The amount of time it takes for half of a sample of a substance to decay

Answer 13

Half-Life

Question 14

HALF-LIFE IN YEARS; USAGE; ELEMENT IT DECAYS INTO

U-235

Answer 14

704 M; dating relatively young rocks and mineral up to 1 B; Pb-207

Question 15

What is the age of the oldest fossil recorded?

Answer 15

3.5 B years old

Question 16

The oldest fossil recorded

Answer 16

Stromatolites

Question 17

What bacteria does stromatolites come from?

Answer 17

Cyanobacteria

Question 18

What is the age of the oldest mineral recorded?

Answer 18

4.4 B years old

Question 19

The oldest mineral recorded

Answer 19

Zircon

Question 20

What is the age of Earth?

Answer 20

4.5 B years old

Question 21

Remains or imprint of an organism used to identify the ages of stratas

Answer 21

Index Fossil

Question 22

Sub-atomic particles called nucleons

Answer 22

Protons and Neutrons

Question 23

The only isotope without a neutron

Answer 23

H-1

Question 24

The four fundamental forces

Answer 24

Gravity, Electromagnetic, Strong Nuclear Force, and Weak Nuclear Force

Question 25

The force that involves anything with touch and electrons

Answer 25

Electromagnetic

Question 26

The force that keeps together the nucleus of an atom

Answer 26

Strong Nuclear Force