Video Guide O rigins- Eart h is Born
Integrated Science
TOC #
N am e ____________________________ Per. ________
1. Describe some of the conditions present on the early Earth.
2. If the Earth’s 4.5 billion year history were condensed to 24 hours, then the first humans walked the
Earth only
ago.
3. In time, gravity shaped collections of rocks into
or little planets.
4. “At midnight on the clock, the newborn planet was nothing but a
covered with
“
ball of rock
5. What lies between Mars and Jupiter?
6. Why are scientists interested in meteorites that hit Earth?
7. What were some of the elements found in the meteorite that hit British Columbia?
8. How old are most meteorites?
9. When the earth was completely molten, what happened to the heavier elements such as iron?
10. What causes the Earth to have magnetic poles?
11. Why does life on Earth depend on Earth’s magnetic field?
12. Give an example of a planet that lost its magnetic shield.
13. From the Apollo missions, scientists discovered that the moon was
than earth.
of years
14. What did scientists discover about the chemistry of moon rocks?
15. Briefly describe the leading theory on the formation of the moon.
16. The moon is moving away from the Earth at a rate of about
inches per year
17. Why is the collision that created the moon considered a major stroke of luck for the Earth
18. Earth’s surface took at least
form its crust
years after the moon was created to cool and
19. What does the narrator identify as the “key to life”?
20. List some of the possible sources for the water in the Earth’s oceans.
21. Does analysis of heavy water support the idea that comets delivered water to the early Earth?
Explain.
22. What does the narrator call the Earth’s greatest drama of all time?