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8 Cards in this Set
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- Back
- 3rd side (hint)
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Physical geology |
The study of earth materials |
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The interactions among the atmosphere, hydrosphere, and biosphere are major contributors to... |
Weathering of earth materials |
- mountain building - weathering of earth materials - metamorphism - plate movement |
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Tectonic plates are composed of ... |
The crust and upper mantle |
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98% of the composition of the universe consists of these two elements. |
Hydrogen and helium |
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Plate movement is thought to be the result of... |
Convection cells (density differences) |
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What two observations led scientists to conclude that the Big Bang occured approximately 15 billion years ago? |
An expanding universe Opaque background radiation |
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According to the currently accepted theory for the origin of the solar system... (3) |
1. A huge nebula collapsed under its own gravitational attraction. 2. A nebula formed a disc with the sun in the center. 3. Planetesimals accreted from gaseous, liquid, and solid particles. |
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Which layer has the same composition as the mantle but behaves like a plastic? |
Asthenosphere |
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