Fossils

Question 0

Original preservation ex.

Answer 0

Tar, freezing, amber, oxygen deprivation

Question 1

Evolution

Answer 1

The change in population as a result of an altered environment

Question 2

Index fossils

Answer 2

Tell how old the surrounding rocks are if one knows how old the fossil is

Question 3

Best index fossil and when

Answer 3

Tribolit end of precambyran era

Question 4

Qualities of a good index fossil

Answer 4

Widespread
Existed during short period of time
Were very abundant
Unique

Question 5

Another name for petrified fossils

Answer 5

Permineralized fossils

Question 6

What are petrified or permineralized fossils?

Answer 6

The hard parts have been removed and replaced by rock minerals

Question 7

Whats Molds and casts?

Answer 7

A cast is when a mold fills with sediment

Question 8

Trace fossil

Answer 8

Evidence of past life ex. Footprints

Question 9

Coprolite is…

Answer 9

Dinosaur feces

Question 10

Relative age

Answer 10

Compared to other things

Question 11

Dendrochronology

Answer 11

Matching up tree rings

Question 12

Varve

Answer 12

Layer of clay and silt

Question 13

Radiometric dating

Answer 13

How old something is using radioactivity

Question 14

Every 5730 years how much carbon 14 will decay to nitrogen 14

Answer 14

1/2

Question 15

Fact

Answer 15

All living things have same amount of carbon 14 in them

Question 16

Carbon 14 dating works for how long

Answer 16

Up to 50,000 years

Question 17

Earth was formed during which era?

Answer 17

Precambrian

Question 18

Differentiation

Answer 18

While earth was still molten the lightest material would float to top heaviest would float to bottom

Question 19

What keeps earth hot

Answer 19

Radioactivity, meteors, gravitational contraction