THEORY OF PLATE TECTONICS(1-26-08)
- Theory is a well-stated concept that explains a wide range of observations
- It is predictive and testable
- Theory-a broad statement
- Law- more precise and specific
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- Ring of fire- Volcanos along border of pacific plate
- Faults- break in the crust where rocks slip past each other
- Divergent Boundary- Two plates pull apart
- African Rift Valley-Plates pulling apart
- Siklet fish lived in lakes on African rift
- Convergent Boundary-Two plates move together
- Transform Boundary- Side by side movement
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CHEMICAL AND PHYSICAL PROPERTIES OF SEA WATER(1-28-09)
- States of matter-solid, liquid, gas
- Density=mass/vol.
- Water most dense at 4 degrees Celsius
- Water=best solvent
- Crusts add salts
- Most of ocean 35% salt
- Temp. has effect on salinity
- Density drops as Salinity increases
- Cold water holds more gases
- Deeper light penetration in open waters rather then shallow shores
- Ocean Circulation-Ocean currents move by gravity
- Thermohaline Circulation- cycle of warm and cold water+salinity
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