SME
Grade 12 Science · Problem type
The history of life
Use this for “Put the major steps in the history of life in order, from the first cells to humans.”
Put in order
Put the steps in the history of life in order.
1
?
2
?
3
?
4
?
5
?
6
?
7
?
8
?
Assumptions
•
Each step built on the ones before.
•
Mass extinctions cleared the way for new groups.
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Earth's history: the early Earth, its atmosphere and the history of life
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Use this for “How was Earth’s early atmosphere different from today’s, and what changed it?”