What's a fossil?

Question 1

What’s a fossil?

Answer 1

Preserved remains or traces of organisms from the remote past

Question 2

What are some examples of traces?

Answer 2

foot tracks or trails

Question 3

What’s an Index fossil?

Answer 3

Fossils that are good to be used for relative dating

Question 4

When was the 1st life?

Answer 4

3.5 Ga (maybe)

Question 5

How do organisms get preserved?

Answer 5

1. ) Buried in a protective medium quickly

2. ) Presence of hard parts

Question 6

What and how old is the first fossil?

Answer 6

Algae and 3.7 Ga

Question 7

What’s the best protective medium for preservation?

Answer 7

Marine setting

Question 8

What are the 3 major types of fossils?

Answer 8

Body, trace, and chemical

Question 9

What’s a body fossil?

Answer 9

Preservation of an actual body part

Question 10

What’s a trace fossil?

Answer 10

Preservation of a trail, track, borrow, or structure

Question 11

What’s a chemical fossil?

Answer 11

Chemicals or isotopes found in rocks that have an organic structure

Question 12

Does DNA last forever?

Answer 12

NO

Question 13

What are the different types of body fossilization?

Answer 13

Unaltered hard parts, unaltered soft parts, and altered hard parts

Question 14

What are direct fossils?

Answer 14

Involve the former hard or soft parts of an organism

Question 15

How can unaltered soft parts be preserved?

Answer 15

Frozen, desiccated, pickled, and entrapment

Question 16

What’s desiccated?

Answer 16

The removal of moisture

Question 17

What’s pickled?

Answer 17

Where organisms are hung and tossed in a swamp

Question 18

What’s entrapment?

Answer 18

It’s like sap or amber

Question 19

How can unaltered hard parts be preserved?

Answer 19

Entombment and pickled

Question 20

What’s entombment?

Answer 20

Where a dead body is put into a tomb or stuck in tar

Question 21

How can altered hard parts be preserved?

Answer 21

Leached, recrystallization, and carbonization

Question 22

What type of fossil does direct fossils fall under?

Answer 22

Body

Question 23

What’s leached?

Answer 23

Where the organic parts are gone and dull of luster

Question 24

What’s recrystallization?

Answer 24

Change in chemical or crystal form of skeletal material without change in chemical composition

Question 25

What’s carbonization?

Answer 25

Where carbon is only left. O, H, and N are driven off

Question 26

What are indirect fossils?

Answer 26

Molds and casts of hard parts

Question 27

What type of fossil does indirect fossils fall under?

Answer 27

Body

Question 28

What are the different types of trace fossilization?

Answer 28

1. ) tracks, trace, footprints, burrows, and bores
2. ) fecal material (coprolites)
3. ) Eggs
4. ) gastroliths

Question 29

What are gastroliths?

Answer 29

Stones that can be eatan or hard concretion that’s int he stomach

Question 30

How are fossils used in forensics?

Answer 30

Evidence from fossils. Body fossils, the skull, trace fossils, bites, patterns, etc.

Question 31

What’s hopanes and which major type of fossils does it fall under?

Answer 31

Evidence for photosynthetic bacteria in rocks 2.7 Ga and chemical fossils

Question 32

What’s steranes and which major type of fossils does it fall under?

Answer 32

Evidence for higher life forms (eucaryotes) in rocks 2.7 Ga and chemical fossils