MY MAIN TIMELINE⭐️ Flashcards
When was the Big Bang?
14.8 billion years ago
When did Earth form?
About 4.5 billion years ago.
When did life appear?
About 3.7 billion years ago
When dis first human appear?
300,000’years ago.
Bones of primitive Homo sapiens first appear 300,000 years ago in Africa, with brains as large or larger than ours. They’re followed by anatomically modern Homo sapiens at least 200,000 years ago, and brain shape became essentially modern by at least 100,000 years ago.
When did dinosaurs roam the earth.
Non-bird dinosaurs lived between about 245 and 66 million years ago, in a time known as the Mesozoic Era.
Scientists divide the Mesozoic Era into three periods: the Triassic, Jurassic and Cretaceous.
When did civilization begin?
X
When was Greece at its peak?
X
When was Rome big?
D
What are the three periods of the Mesozoic Era?
Triaasic
Jurrasic
Cretaceous
Triassic
X
Jurrassic
D
Cretaceous
X
Name the five units of geologic time.
eons, eras, periods, epochs, and ages.
What is an eon?
X
What is an era?
X
