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Synthesis of large body of information that encompasses well tested and verified hypotheses about certain aspects of the natural world.
Theory means lots of eveidence to support it. |
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Observation
Question
Hypotesis
Predictions
Experimentation
Conclusion
Important agreement in scientific community |
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| Research that focuses on providing us with food, medicine, and material goods. |
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When a hypothesis is tested over and over and over and hasn't been contradicted.
Law of gravity. Law of motion. |
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| Leads to greater understanding of how natural world works. Knoweld for knowledge's sake. |
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| Any activity aimed at the systematic discovery and interpretation of new knowledge. |
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| Theory of Plate Tectonics |
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| Theory describing movement of plates. 1960s scientists discovered mantle currents. |
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| Theory of Continental Drift |
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| Surface of Earth has 8 large plates and several smaller ones covering it. (Convection current in the mantle causes them to move). Theory created by Alfred Wegener. He didn't know why they moved, and felt other scientists should discover that. He was laughed at. |
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Travels through Earth's interior.
a. Primary-1st ones-travel in all directions.
b. secondary-after primary, only travel through solids. |
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| Two plates come together. ------><------- |
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One plate slides under the other. Creates mountains like the Andes and Himalyas.
<-------
~~~~~~
V |
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2 plates moving away from each other. Like Mid-Atlantic ridge between Europe and N. America.
<-------- ----------> |
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Two plates moving side by side. like San Andreas fault. These produce the most violent earthquakes. |
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Crust,
Mantle
Outer Core
Inner Core |
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| waves that travel thru the Earth's interior caused by an earthquake. |
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Travel on surface
a-Love-fastest surface wave, side to side
b. rayleigh-roll side to side and twist |
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| 1600 degree Fahrenheit. Under ocean. 3-5 mi thick. |
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Lithosphere-Directly under crust
Athenosphere-plastic-y layer-liquid/solid very heavy and thick 5000 degrees F |
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| Made of nickel and iron and houes Earth's magnetic field. 6700 degrees F. 1400 miles thick |
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| Nickel and iron, but still a solid. up to 7800 degrees F. Pressure and weight cause it to stay together as a solid. They vibrate in place as a solid. |
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