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Life and how it all started Flashcards | StudBud

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Life and how it all started

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Review of Pre Cambrian lessons

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Questions 10

Answers

1
What is a Craton?
The crust of earth which has remained unchanged
Isn't that something you put on a salad?
An older term meaning "formation"
An area underneath the ocean floor
2
What do Greenstones indicate the earth once had?
Oceanic Trenches
Subduction Zones
Green Plants
Induction Zones
3
What happened to Pangea?
It sunk to the bottom of the ocean
It separated to form separate continents
It is still together to this day
No one knows
4
The first sign of life on earth was created by?
The sun moving closer to Earth
Water melting and forming the oceans
The presence of oxygen
The moon was finally inline with the the Earth's rotation
5
What is a supercontinent?
Russia, China, and India combined
A large grouping of continents connected
Where Superman is from
It describes what North and South America make up
6
How old is earth?
2016 years
4.5 billion
8.5 billion
2.1 million
7
What is the earth covered in?
Ice
Carbon
Methane
Nitrogen
8
Unicellular means?
Not even scientists know
Single celled
Multi-celled
No cells
9
Multi-cellular means?
Cell phone towers in your region
Single cell
No cells
More than one cell
10
What is happening in this photo?
The sun is being born
A planet is colliding with Earth, sparking Earth's future
The moon is being created
Earth is exploding from pressure