Things to know for test #1 (Spring Sem)

Question 1

Contributions of early philosophers & scientists?

Answer 1

(In notebook, page #12)

Question 2

Principles used for relative dating?

Answer 2

(In notebook, page #14)

Question 3

3 types of unconformities

Answer 3

1. Angular (deposi. of sediment, folding & uplift, erosion, renewed deposit.)
2. Noncomformity (intrusion, weathering and exposure of rock,deposit. of sedimentary layers)
3. Disonformity (break in the rock caused by erosion / non deposit. sediment)

Question 4

Principles of radioactive decay

Answer 4

1. Parent=decaying radioactive isotope
2. Daughter=decay product
   (loss or gain of neutron , parent to daughter to same element)
   (loss or gain proton changes parent to new element)

Question 5

Age of the earth?

Answer 5

4.6 billion years

Question 6

Know how Geologic time scale is divided

Answer 6

Eons- The largest divison of time in the geologic scale (phanerozoic/visible life)
Eras- The 2nd largest division of time in G.t.s. (Mesozoic, cenozoic, Paleozoic..)
Periods- The 3rd largest division of time in the G.t.s (permian)
Epoch- unit of geological time during which a rock series is deposited

Question 7

Origin of the solar system?

Answer 7

The solar system originated from a dense cloud of interstellar gas and dust.