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Question 1

Rock layers form one at a time, layers of rock at the bottom are usually older than the layers above them

Answer 1

Superposition

Question 2

sedimentary layers usually start out flat and stay flat until they are deformed

Answer 2

Horizontality

Question 3

We find fossils preserved in rocks in the same order that the organisms lived on Earth

Answer 3

Fossil Succession

Question 4

Crystalline rocks underlay younger sediments, with a gap in time between them

Answer 4

Nonconformity

Question 5

Deformed rocks underlay flat rocks, with a gap in time between them

Answer 5

Angular unconformity

Question 6

flat rocks underlay flat rocks, with a gap in time between them

Answer 6

Disconformity

Question 7

younger rocks or faults cut through older one

Answer 7

Cross-Cutting

Question 8

Older rocks can be trapped as pieces inside younger rocks

Answer 8

Included Pieces

Question 9

Three types of unconformities:

Answer 9

Nonconformity
Angular Unconformity
disconformity

Question 10

_______ is found in deeper rocks than _____ because trilobites lived on Earth before clams did

Answer 10

Trilobite B

Clam E

Question 11

Loose sediments start out in ___________

Answer 11

horizontal layers

Question 12

Interpreting unconformities

Answer 12

uplift and erosion exposes basement

Mountain building deforms older rocks

Pause or mirror erosion making missing fossils

Question 13

We can “read” rocks like a book if we can figure out the exact order they formed over overtime.

This process is called ________

Answer 13

age-dating

Question 14

If we see them still lying flat

Answer 14

nothing has happened

Question 15

If we see them bent or tilted

Answer 15

they’ve been deformed by past events