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What are the various components of the hydrosphere?
97% is in the oceans. Other natural water sources.
What does it mean when we say that the atmosphere, geosphere, hydrosphere, and biosphere are in a state of dynamic equilibrium with respect to one another?
Why does geologic time enable us to use ordinary, observable processes to explain most of what we see on earth (uniformitarianism).
Most of Earth's features can be explained by observable processes acting over geologic time spans according to natural laws.
What is the basic premise of the rock cycle?
Continual transformation of rocks from one type to another.
formed when rocks recrystallize without melting, due to heat and pressure deep underground.
What is the basic premise of the hydrologic cycle
Continous transfer of water from one repository to another.
What are the components of the hydrologic cycle?
Cycle of Evaporation, Condensation, Precipitation, Infiltration and Runoff.
What powers the hydrolic cycle? (see chapter 9 for a discussion of this topic)
Primary Water Source = Oceans. Primary Energy Source = Sun. (? Is this all you want us to know?)
What is the theory of plate tectonics?
Motion and interaction of rigid, interlocking plate-like segments of Earth.
Crust + uppermost mantle joined as a single rigid unit. Average thickness = 100 km (62 mi). This is what "plates" are made of.
Two plates pull apart and move away from one another. As they diverge, magma intrudes into cracks and forms new lithosphere. Almost all occur along the central part (axis) of oceanic ridges. Earthquakes and volcanic activity occur here.
Two plates collide and one is forced down under the other into the mantle where it is "recycled." This causes quakes and violent volcanic activity. Deep ocean trenches mark where one plate slips under the other. Volcanic island arcs and continental volcanic arcs form next to them. When two continental plates collide, a great mountain range is formed.
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