bio history Flashcards
1
Q
give the order of GTS (older to younger)
A
Hadean (unseen)
Archaean (ancient/primitive)
Proterozoic (before complex life)
Phanerozoic (visible life)
2
Q
time period of hadean?
A
- 6 to 4 billion years ago
3
Q
Atmosphere of hadean?
A
Hot, thick, steamy, and full of dust. Made up of carbon dioxide and water vapor, nitrogen and sulfur.
4
Q
what is the geology of hadean?
A
Covered with oceans of liquid rock, boiling sulfur, and impact craters
5
Q
what is the time period of archean?
A
4 to 2.5 billion years ago
6
Q
atmosphere of archean?
A
methane, ammonia
7
Q
geology of archean?
A
Formation of the continental shield rock and formation of oceans
8
Q
life forms in archean?
A
cyanobacteria (stromatolites) and extremophiles.
9
Q
when did life began?
A
3.5 to 2.8 billion years ago
10
Q
A
11
Q
A
