Transcript Earth`s History The story of a wimpy planet. ( Or

EARTH’S HISTORY
The story of a wimpy planet. ( Or is it?)
-An example of what a finished “novel” might look
like is on slide 12.
-Earth’s Timeline material starts on slide 13.
RESEARCH RESOURCES:

Network Videos:


Computer->Students->Abraham->Science Class->
Earth’s History Videos
BrainPOP Videos
Geologic Time
 Earth
 Carbon Dating
 Extinction


Most came
from YouTube
Earth in Space Textbook
Geologic Time – Page 296
 Dinosaur Extinction – Pages 305-308
 Finding the Age of Rocks – Pages 309-311


ScienceSaurus
Earth’s History – Pages 194-200
 Extinction – Page 118

WHERE DID THE EARTH COME FROM?
Space Gas
and Dust
(from a
nebula)
IF THE EARLY EARTH WAS SO INHOSPITABLE WHAT
HAPPENED TO MAKE LIFE POSSIBLE ON EARTH?
The Earth cooled
and we got liquid
water and
oxygen.
WHAT ARE THE “CHAPTERS” OF EARTH’S
HISTORY?
There are 4
different types of
time periods all
based on major
events/changes.
WHAT ARE SOME CHANGES IN EARTH’S
ATMOSPHERE?
More to come.
WHAT ARE SOME MAJOR EVENTS/CHANGES
IN LIFE ON EARTH?
More to come.
WHAT WAS THE LAST MAJOR CHANGE IN
THE STORY?
More to come.
WHAT IS THE GOLDILOCKS
PRINCIPLE/EFFECT?
More to come.
WHAT ARE SOME POSSIBILITIES FOR THE
END OF EARTH’S STORY?
More to come.
EARTH HISTORY STORY
(MR. B’S VERSION)
THANK YOU FOR SHARING
Our planet and solar system was
built from the remains of an
exploded star
The rocks tell the story
of how the Earth has
changed over time
Scientists determine age through:
Relative dating – Placement in
layers
Absolute dating: Chemical
composition
Periodic space impacts
have affected Earth
Landscapes and Life
Time periods are
based on major
changes to life
Life has changed Earth:
Photosynthesis gave Oxygen
New rocks – Limestone, coral,
coal
Weathering of rocks leads to
erosion
Humans change the land and
climate
`
EARTH’S HISTORY TIMELINE DATA
Measure from the
“present day” end.
#
Date
Distance
1
4.5 bya
4.5 m
2
3.7 bya
3.7m
3
3.5 bya
3.5 m
4 3.25 bya
3.25 m
5
2.4 bya
2.4 m
6
1.9 bya
1.9 m
7 650 mya
65 cm
8 500 mya
50 cm
9 250 mya
25 cm
10 245 mya 24.5 cm
11 150 mya
15 cm
12 65 mya
6.5 cm
13 3.5 mya
3.5 mm
14 100,000 ya .1 mm
15 10,000 ya .01 mm/1µm
Measure from
the “start” end.
Major Event/Change
Earth is Formed
Earth’s Crust Solidified
First Life Appears in Oceans
Photosynthesis Begins in Oceans
Oceans Contain Significant Amounts of Oxygen
First Cells with Nuclei Appear in Oceans
First Multicellular Organisms Appear
First Land Plants with Inner Vessels
Mass Extinction of 99% of all Species
Age of Dinosaurs Begins
Supercontinent Breaking Up; Continents Drift
Age of Dinosaur Ends; 70% of Species Extinct
First Proto-Humans Appear in Africa
First Homo sapiens(Humans) Appear
Recorded Human History Begins
Teacher’s Recommendation
µm= micrometer
(A human hair is about
50-100 micrometers thick.
A piece of paper is
about 150 micrometers thick.)
THIS IS ALL IN THE FIRST 30 CM OR SO.