Chapter 8

Question 1

Global climate change caused

Answer 1

the extinction of the dinosaurs.

Question 2

Relative dating compares

Answer 2

one rock layer to others in sequence.

Question 3

Molten rock that squeezes into existing rock is called

Answer 3

intrusion.

Question 4

Sedimentary rock is formed when

Answer 4

sediment is lithified.

Question 5

younger rocks on top of older.

Answer 5

Superposition sequence

Question 6

body of rock is younger than the rock it

passes through.

Answer 6

Crosscutting relationship

Question 7

Fossils are preserved in

Answer 7

sedimentary rock.

Question 8

missing part of geologic record.

Answer 8

Unconformity

Question 9

Paleontology-

Answer 9

study of past life.

Question 10

idea geologic processes are the same now as they

were in the past.

Answer 10

Uniformitarianism

Question 11

science that combines uniformitarianism and

catastrophism.

Answer 11

Modern Geology

Question 12

break in Earth’s crust

Answer 12

Fault-

Question 13

rock layers bent by Earth’s internal forces.

Answer 13

Folding-

Question 14

rock squeezed into existing rock.

Answer 14

Intrusion-

Question 15

rock layers slanted by Earth’s internal forces.

Answer 15

Tilting-

Question 16

time for half to decay

Answer 16

Half-life

Question 17

method of measuring the age of an event.

Answer 17

Absolute dating

Question 18

Radioactive decay is the breaking down of ______ into _____.

Answer 18

1. radioactive isotopes

2. other elements.

Question 19

finding the age of a rock based on ratio of

material.

Answer 19

Radiometric dating -