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History of the Earth timeline
ess
27
Science
12th Grade
09/24/2013

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Cards

Term
4.56 Billon
Definition
Earth forms
Term
4.4 billon
Definition
oldest mineral grain found
Term
4.1 billon
Definition
oldest peice of rock ever found
Term
3.9 billon
Definition
oldest evidence of a continent
Term
3.8 billon
Definition
first evidence of life
Term
3.5 billon
Definition
first fossiles(algae and bacteria)
Term
1.8 billon
Definition
free O2 in atmosphere
Term
1.1 billon
Definition
first fossil of a complex organisms
Term
540 millon
Definition
first abundant life found in the rock record
Term
460 millon
Definition
first fish
Term
440 millon
Definition
first land plants
Term
410 millon
Definition
first land animals
Term
250 millon
Definition
largest mass extinction
Term
247 millon
Definition
first donsaurs
Term
240 millon
Definition
first mammals
Term
220 millon
Definition
break up of super continent pangaea begins
Term
145 millon
Definition
first flowering plants
Term
65 millon
Definition
dinosaurs and other anumals go extint
Term
30 millon
Definition
mammals/flowering plant become abundant
Term
5 millon
Definition
beginning of cascade
Term
1.8 millon
Definition
first primate in genus homo!
Term
40,000
Definition
first homo sap[iens
Term
13,000
Definition
humans first inhabit north american
Term
10,000
Definition
end of last ice age
Term
8,000
Definition
founding of jericho, the first known city
Term
500
Definition
european rediscovery of the americas
Term
34
Definition
humans first explore the moon
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