8th Science
Class Notes
9 & 10 December 1998
Geologic –
Diastrophism –
Process that keeps things moving.
Chemical –
Ocean is "Earth’s Soup"
Constant mixing
H2O – Water
AU – Gold
AL – Aluminum
SG – Specific Gravity
IC – Inner Core
OC – Outer Core
GENERAL INFORMATION ABOUT THE OCEAN
Ocean
71% - 72% of Earth is covered by oceans.
Pacific coast shrinking about 1 inch a year.
67% of land in N. Hemisphere
Ocean currents are HEAT MOVERS
Ocean Currents
Warm
Cold
Oceans are regulators
Primary source of H2O
Largest reservoir (well) of Carbon
Regulates our climate
Helps regulates food source
Mineral source
Transportation
EARTH’S INTERIOR
Center of Earth
Cores (2)
1. Inner Core
Solid
Iron
Nickel
Specific Gravity (17 g/cm3)
Directly related t o the density of a substance
2. Outer Core
Liquid
Specific Gravity (12g/cm3)
Magnetic field is in outer core
AU AL
Earth’s interior is arranged by density.
Lithosphere
Asthenosphere
Mesosphere
Outer Core
Inner Core
Mantle
68% of Earth’s interior
3 Zones
1. Mesosphere
Solid
Specific Gravity (5g/cm3)
2. Asthenosphere
Specific Gravity (4g/cm3)
Plastic-like
Can be molded (tar-like)
Soft
Continents are embedded in the Athenosphere
Magma
Volcanic activity
3. Lithosphere
Solid
Earth’s Crust (2 types)
1. Thin Veneer
Land
Light colored
"SIAL"
Silicone
Aluminum
2. Ocean Basin Crust
Dark colored
"SIMA"
Silicone
Magnesium
8th Science
Mrs. Willey’s Class Notes
11 - 14 December 1998
Topography
H20 Depth
200-300 Feet deep off the coast
Continent gradually go down hill into the ocean.
Georgia Banks
Grand Banks
North America is moving West into the Pacific Ocean 1 inch per year. Pacific Ocean is going to be diminished and the Atlantic Ocean will increase in size. North America will be neighbors of Japan in Million/s of years from now.
Ocean Topography
(See Diagram From Class)