What does the term 'Precambrian' originally refer to?

Earth's Geological Eras and Atmospheres

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Science, Biology, Geography
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The period before the Cambrian Period
The period of human evolution
The period of dinosaur extinction
The period after the Cambrian Period
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following eras is NOT part of the Precambrian Period?
Hadean
Proterozoic
Archaean
Jurassic
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During the Hadean Era, what was the Earth's atmosphere primarily composed of?
Oxygen and nitrogen
Hydrogen and helium
Carbon dioxide and water vapor
Methane and ammonia
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What significant event is believed to have occurred at the start of the Hadean Era?
Formation of the first continents
Collision with an asteroid the size of Mars
Emergence of multicellular life
Development of the ozone layer
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What major change occurred during the Archaean Era?
The Earth became entirely covered in ice
The formation of a global ocean
The extinction of dinosaurs
The rise of mammals
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What was the primary composition of the atmosphere during the Archaean Era?
Sulfur dioxide
Nitrogen
Oxygen
Carbon monoxide
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What geological formations were created by volcanic activity during the Archaean Era?
Mountain ranges
Desert dunes
Island chains
River valleys
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