3/29/2015
The Earth
• A large terrestrial
planet with a large
satellite (moon)
• To learn more about
the Earth take
Introduction to
Geology
A solid inner core and a liquid
outer core.
Nickel and Iron
Magnetic field.
What is needed to produce a
magnetic field?
•_______________________
______________________
•_______________________
_______________________
Aurorae (northern lights).
1
3/29/2015
Plate Tectonics
Plates, Volcanoes, Earthquakes locations
2
3/29/2015
Volcanoes
Different Types (main categories)
______________________
•Break in oceanic crust - Hawaii, Iceland
•very fluid lava - wider base
•less dangerous eruptions.
_______________________
•Found near subduction regions - Andes, Cascades
•high viscosity lava - steeper slopes
•dangerous eruptions
3
3/29/2015
What else is there on the Earth?
4
3/29/2015
5
3/29/2015
Weather - Atmosphere
For greater detail, take Elements of Weather
Composition
78 % ______________
21 % ______________
0.1 - 3 % _____________
0.03 % _________________
Original atmosphere of the Earth?
No, a secondary atmosphere.
Where did our modern atmosphere come from?
Current Atmosphere
Volcanic Gases
•79 % Water
•12 % CO2
•1.3 % Nitrogen
__________
•78 % Nitrogen
_________
•21 % Oxygen
_______
•0.1 - 3 % Water
•0.03 % CO2
How can volcanoes produce the current atmosphere?
With help.....
Water vapor becomes ____________
CO2 trapped in ________ (______________________________!)
_____________ increases the oxygen content
6