The Precambrian Period
Presentation
•
Science
•
9th Grade
•
Hard
Joseph Anderson
FREE Resource
18 Slides • 8 Questions
1
Paleo-biosphere and Precambrian time
Earth Science
2
What is the Paleo-biosphere?
- Paleo means older or ancient, especially relating to the geological past.
- Use of the fossil record and carbon dating to gather evidence of Earth's broad history.
- Geological time is vast!
- Watch the video about the beginning of life on Earth. Be ready to compare features of early Earth to the features of Earth today.
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4
Open Ended
In your own words. How do early Earth conditions and features compare to Earth conditions and features today?
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Multiple Choice
Earth was formed how long ago?
5 million years ago
4.56 billion years ago
100,000 years ago
500 million years ago
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10
Multiple Choice
What is the longest geological time period? It began at the origin of Earth and spanned over 4 billion years.
Cambrian
Precambrian
Paleozoic
Cenozoic
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Open Ended
Why are Precambrian events so hard to determine? Provide at least one reason!
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Multiple Choice
Earth early atmosphere is composed mainly of what gas below?
O2
CO2
HCl
Argon
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Open Ended
What changed the contents of gases in the atmosphere?
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Open Ended
Shields are composed of __________, Evidence of ___________, and important because _____________.
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Open Ended
Stromatolites are composed of__________, Evidence of _____________, and are important because ________________.
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Paleo-biosphere and Precambrian time
Earth Science
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