Early Earth history

Fill in the blanks about each question about history on earth

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Last updated: December 15, 2020

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First submitted	December 15, 2020
Times taken	7
Average score	26.7%
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Hint	Answer
The earth formed...	4.6 billion
what most likely brought water on earth	asteroids
When did early life first form	3.5 billion
What was the first producer organism	Cyanobacteria
what major cooling event happened	Huronian glaciation
domain with nucleus that contains dna	Eukaryote
The organelle to first merge with eukaryote cell	Mitochondria
When multicellular life formed	600 million

Hint	Answer
Major ice age event called	snow ball earth
first order of animals	Sponge
period when complex multicellular life formed	Edicarian Period
Major event,Arthropoda,chordates,and mollusks formed in this event	Cambrian explosion
Large predator in Cambrian	Anomalcaris
First chordate	Pikaia
When plants went on land	500 million

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