1. 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.

2. Research Resources: Network Videos: BrainPOP Videos
Computer->Students->Abraham->Science Class-> Earth’s History Videos
BrainPOP Videos
Geologic Time
Earth
Carbon Dating
Extinction
Earth in Space Textbook
Geologic Time – Page 296
Dinosaur Extinction – Pages
Finding the Age of Rocks – Pages
ScienceSaurus
Earth’s History – Pages
Extinction – Page 118
Most came from YouTube

3. Where did the Earth come from?
Space Gas and Dust (from a nebula)

4. The Earth cooled and we got liquid water and oxygen.
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.

5. What are the “chapters” of Earth’s History?
There are 4 different types of time periods all based on major events/changes.

6. What are some changes in Earth’s Atmosphere?
More to come.

7. What are some major events/changes in life on Earth?
More to come.

8. What was the last major change in the story?
More to come.

9. What is the Goldilocks Principle/Effect?
More to come.

10. What are some possibilities for the end of Earth’s story?
More to come.

11. 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
Scientists determine age through:
Relative dating – Placement in layers
Absolute dating: Chemical composition
Time periods are based on major changes to life
The rocks tell the story of how the Earth has changed over time
Life has changed Earth:
Photosynthesis gave Oxygen
New rocks – Limestone, coral, coal
Weathering of rocks leads to erosion
Humans change the land and climate
Periodic space impacts have affected Earth Landscapes and Life

12. `
Purgatorius

13. Earth’s History Timeline Data
Teacher’s Recommendation
Major Event/Change #
Date
Distance
Earth is Formed 1
4.5 bya
4.5 m
Earth’s Crust Solidified 2
3.7 bya
3.7m
First Life Appears in Oceans 3
3.5 bya
3.5 m
Photosynthesis Begins in Oceans 4
3.25 bya
3.25 m
Oceans Contain Significant Amounts of Oxygen 5
2.4 bya
2.4 m
First Cells with Nuclei Appear in Oceans 6
1.9 bya
1.9 m
First Multicellular Organisms Appear 7
650 mya
65 cm
First Land Plants with Inner Vessels 8
500 mya
50 cm
Mass Extinction of 99% of all Species 9
250 mya
25 cm
Age of Dinosaurs Begins 10
245 mya
24.5 cm
Supercontinent Breaking Up; Continents Drift 11
150 mya
15 cm
Age of Dinosaur Ends; 70% of Species Extinct 12
65 mya
6.5 cm
First Proto-Humans Appear in Africa 13
3.5 mya
3.5 mm
First Homo sapiens(Humans) Appear 14
100,000 ya
.1 mm
Recorded Human History Begins 15
10,000 ya
.01 mm/1µm
the “start” end.
Measure from
Measure from the “present day” end.
µm= micrometer
(A human hair is about
micrometers thick.
A piece of paper is
about 150 micrometers thick.)

14. This is all in the first 30 cm or so.