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Early Earth
Age of Our Earth
 Blog - Cosmic Calendar
According to the scientific community:
• The big bang happened on the __________
_________ on the cosmic calendar
• Our galaxy was formed - _________ billion years ago
• Our Universe was formed - ________ billion years ago
• Life on earth began _______ billion years ago
• Human life began _________ years ago – the last
_____ _________________ of the cosmic calendar.
Pangaea
what was it?
 1) was a supercontinent
that formed approximately
300 million years ago.
 2) It began to break apart
around 100 million years
after it formed.
 3) The single global ocean
which surrounded
Pangaea is named
Panthalassa.
What evidence is there that
points to the existence of
Pangea?
The distribution of fossils acro
the continents
Continental Drift
 Movement of the earth’s crust
– The plates slowly moved to where they are today.
– Moves about 0.8- 2 inches a year
Types of Earth Movements
1). Convergent: when 2 plates collide into each other
– Result s mountains formed
13,
Mt. Everestelevation
29,029 ft.
(5.5 mi)
Types of Movements
2). Divergent: when 2 plates separate from each
other
– Result s valleys formed
Types of Movements
3). Transverse: when 2 plates rub against each other
– Result s earthquakes
Pacific Ring of Fire
 A majority of the world’s fault activity falls along the
edge of the Pacific Ocean