Science Test #3 (Early earth) Flashcards
1
Q
How was the atmosphere of early Earth different from today’s atmosphere?
A
It was thicker and was primarily composed of CO₂ , but it had little oxygen.
2
Q
What do scientists think were the first forms of life?
A
The first forms of life were Archaebacteria
3
Q
What was the cellular organization of Archaebacteria
A
They were single cellular organisms.
4
Q
Where were Archaebacteria found?
A
They are in extreme environments, like really hot places or deep in the ocean.
5
Q
How did Archaebacteria obtain energy?
A
Mainly though chemosynthesis, meaning they get energy from chemicals like organic and inorganic compounds
