Ch 21 terms

Question 1

fossil

Answer 1

any evidence of former life

Question 2

fossil qualificatiopn

Answer 2

actual remains, altered remains, preservation of the shape of an organism, or any sign of activity (trace fossils)

Question 3

mineralization

Answer 3

deposition of mineral matter by in the pore spaces of an object

Question 4

pertified wood

Answer 4

mineralization and replacement of wood

Question 5

replacement

Answer 5

dissolution and and deposition of mineral matter

Question 6

carbon film

Answer 6

volatile and gaseous constituents are distilled away

Question 7

mold

Answer 7

a void where an organism was buried

Question 8

cast

Answer 8

a void filled with mineral matter

Question 9

clues for geologic process order

Answer 9

principle of uniformity, principles of original horizontality, principle of superposition, principle of crosscutting relationships, shifting of sites of erosion and depositon, faunal sucession

Question 10

radiometric age of rocks

Answer 10

radioactive decay process

Question 11

eras of geologic time scale

Answer 11

cenozoic,paleozoic mesozoic, precambrian

Question 12

periods divided into

Answer 12

epochs