Earth Timeline Flashcards
1
Q
When did Earth form?
A
4.56 billion years ago
2
Q
When did prokaryotes form?
A
3.5 billion years ago
3
Q
When did photosynthesising cyanobacteria form?
A
3 billion years ago
4
Q
When did multicellular organisms form?
A
2.1 billion years ago
5
Q
When did eukaryotes form?
A
600 billion years ago
6
Q
When did land plants form?
A
420 million years ago
7
Q
When did Homo sapiens form?
A
200 000 years ago
