Download Representing Geology time

Representing Geology time.
Timeline scale
On the left side of your page draw a line 23 cm long. Each centimetre on this line represents 200 million
years.
on the right side of your page draw another 27 cm long line. On this line, each centimetre represents 20
million years.
What to put on your timeline.
Left timeline
At the top of your timeline mark the formation of the earth at 4.6 billion years.
At the bottom of your timeline mark the present day.
Between these points mark:
 The formation of the oldest rocks 4 billion years ago
 Formation of oceans 3.7 billion years ago
 First bacteria cells 3.4 billion years ago
 Photosynthesis by algae 3 billion years ago
 Build-up of oxygen from photos synthesis 2.7 billion years ago.
 First Eukaryotic cell life 2 billion years ago (kind of like human cells)
 Rise of multi-cellular organisms 1.5 billion years ago
 Rocks in Adelaide hills formed 0.7 billion years ago (700 million years ago)
Finally, draw a line from the 540 Million year mark to the top of the time line on the right of the page, a
line from your “present day” mark to the bottom of the timeline on the right.
Right time line.
At the top of your right timeline mark the Cambrian explosion at 540 million years ago. At the bottom of
your timeline mark the present day.
Between these points, mark:
 Rocks in Adelaide hills folded 500 million years ago
 First land plants 430 million years ago
 First insects 400 million years ago
 First reptiles 310 million years ago
 First dinosaurs 240 million years ago
 First mammals 220 million years ago
 Gondwana begins to break apart 180 million years ago
 First birds 160 million years
 First flowering plants 130 million years ago
 Last dinosaurs extinct 60 million years ago
 Uplift of the Adelaide hills 30 million years ago
 First proto-humans 3 million years ago (about 1.5 mm dot)
https://youtu.be/YXSEyttblMI
the formation of the earth

First reptiles
oldest rocks

First dinosaurs

First mammals

Gondwana begins to break apart

Adelaide hills

proto-humans
First bacteria cells
algae

First Eukaryotic cell life
Cambrian explosion