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Cards In This Set
| Front | Back |
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5 Billion years ago
earth is formed, along with the other planets.
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5 Billion years ago
earth is formed, along with the other planets
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3.7 billion years ago
earth's crust solidified
( square 104)
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3.7 billion years ago
earth's crust solidified
( square 104)
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3.5 Billion years ago
First life appears in oceans
( square 120)
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3.5 Billion years ago
First life appears in oceans
( square 120)
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3.25 billion years ago
photosynthesis begins in oceans ( square 140)
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3.25 billion years ago
photosynthesis begins in oceans ( square 140)
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2. 4 Billion years ago
Oceans contain significant amounts of oxygen
( Square 208)
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2. 4 Billion years ago
Oceans contain significant amounts of oxygen
( Square 208)
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1.9 Billion years ago
first cells with nucleai appear in oceans ( square 248)
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1.9 Billion years ago
first cells with nucleai appear in oceans ( square 248)
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0.65 billion years ago
first multicellular organisms appear ( square 348)
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0.65 billion years ago
first multicellular organisms appear ( square 348)
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0.5 billion years ago
first land plants with inner vessels ( square 359)
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0.5 billion years ago
first land plants with inner vessels ( square 359)
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250 million years ago
mass extinction of 99% of all life
( square 380)
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250 million years ago
mass extinction of 99% of all life
( square 380)
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245 million years ago
Age of Dinosaurs begin ( square 380)
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245 million years ago
Age of Dinosaurs begin ( square 380)
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150 million years ago
Supercontinent breaking up : continents drifting apart ( square 388)
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150 million years ago
Supercontinent breaking up : continents drifting apart ( square 388)
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65 million years ago:
Age of Dinosaurs ends; with mass extinction of 70% of all living things ( square 394)
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65 million years ago:
Age of Dinosaurs ends; with mass extinction of 70% of all living things ( square 394)
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3.5 million years ago
First proto-humans appear, in what is now Africa ( last square , 3.1 cm from the end )
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3.5 million years ago
First proto-humans appear, in what is now Africa ( last square , 3.1 cm from the end )
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100, 000 years ago : First Homo Sapiens appear ( last square 1mm from the end)
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100, 000 years ago : First Homo Sapiens appear ( last square 1mm from the end)
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10,000 years ago:
Recorded human history begins
( last square, 0.1 mm from end)
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10,000 years ago:
Recorded human history begins
( last square, 0.1 mm from end)
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