3.4 Looking at Fossils

Question 1

the remains of physical evidence of an organism preserved by geological processes

Answer 1

fossil

Question 2

a process where minerals replace an organism’s tissues

Answer 2

petrifaction

Question 3

a process in which the pore space in an organism’s tissue is filled up with mineral

Answer 3

permineralization

Question 4

a form of petrifaction a process in which the organism’s tissues are completely replaced by minerals

Answer 4

replacement

Question 5

a fossilized mark that is formed in soft sediment by the movement of an animal

Answer 5

trace fossil

Question 6

a mark of cavity made in a sedimentary surface by a shell or body

Answer 6

mold

Question 7

a type of fossil that forms when sediments fill in the cavity left by a decomposed organism

Answer 7

cast

Question 8

preserved animal dung

Answer 8

coprolite

Question 9

a fossil that is found in the rock layers of only one geologic age and that is used to establish the age of rock layers

Answer 9

index fossil

Question 10

a type of index fossil

Answer 10

Phacops