history of the earth Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

conditions that made early life possible

A

abiotic synthesis of small organic molecules, joining of these small molecules into macromolecules, packaging of molecules into protocells, origin of self replicating molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

abiotic synthesis of macromolecules

A

rna monomers have been produced spontaneously, small organic molecules polymerize on hot surfaces, first compounds were made near volcanoes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

protocells

A

droplets with membranes that maintained an internal chemistry different from that of their surroundings, early self replicating cells may have appeared in proto cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what protocells may have been made with

A

may have formed from fluid filled vesicles with a membrane, clay to form vesicles that exhibit simple reproduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

fossil record

A

documents the history of life, based on the sequence in which fossils accumulated in rock layers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

radiometric dating

A

method by which absolute age of fossils can be determined

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Hadean Eon

A

4,600-3,850 mya, origin of earth, oldest rocks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

archaen eon

A

3,850-2,500 mya, oxygen increases, oldest fossils of cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

proterozoic eon

A

2,500-542 mya, oldest eukaryotic fossil cells, diverse algae and soft body inverts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

phanerozoic eon

A

paleozoic, mesozoic, cenozoic eras

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

paleozoic

A

542-251 mya, cambrian explosion, diversification of vascular plants, bony fishes, forests expand, origin of reptiles and amphibians, radiation of reptiles, largest mass extinction (permian)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

mesozoic

A

251-65 mya, dinos evolve and radiate, origin of mammals, gymnosperms dominate landscape, angiosperms appear and diversify, dinos become extinct

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

cenozoic

A

65.5 mya, major radiation of animals, angiosperms dominate, origin of primates, appearance of bipedal humans, ice age, first written language

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

stromatolites

A

oldest known fossils, rock formed by layers on bacterial mats, 3.5 million years ago

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

mass extinctions

A

permian extinction, cretaceous mass extinction, triassic extinction, devonian extinction, holocene extinction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
A