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history of earth timeline
n/a
28
Science
12th Grade
09/24/2013

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Cards

Term
4.56 billion years ago
Definition
earth forms
Term
4.4 bllion years ago
Definition
oldest piece of rock ever found
Term
4.1 billion years ago
Definition
oldest evidence of a continent
Term
3.9 billion years ago
Definition
oldest evidence of a continent
Term
3.8 billion years ago
Definition
first evidence of life
Term
3.5 billion years ago
Definition
first fossils(algae & bacteria)
Term
1.8 billion years ago
Definition
free o2 in atmosphere
Term
1.1 billion years ago
Definition
first fossil of a complex organism (a worm)
Term
540 million years ago
Definition
first abundent life found in the rock record
Term
460 million years ago
Definition
first fish
Term
440 million years ago
Definition
first land plants
Term
410 million years ago
Definition
first land animals
Term
250 million years ago
Definition
largest mass extinction
Term
247 million years ago
Definition
first dinosours
Term
240 million years ago
Definition
first mammals
Term
220 million years ago
Definition
break up of super continent pangea begins
Term
145 million years ago
Definition
first flowering plants
Term
65 million years ago
Definition
dinosours and other animas go extinct
Term
30 million years ago
Definition
mammals/flowering plants become abundent
Term
5 million years ago
Definition
beginning of cascade
Term
1.8 million years ago
Definition
first primate in genus homo
Term
40,000 years ago
Definition
first homo sapiens
Term
13,000years ago
Definition
humans first inhabit north america
Term
10,000 years ago
Definition
end of last ice age
Term
8,000 years ago
Definition
founding of jerico,the first known city
Term
2,000 years ago
Definition
roman domination of the world
Term
500 years ago
Definition
european rediscovery of americas
Term
34
Definition
humans first explore moon
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