Geology test #1 pt. 1 Worksheet

Thin outer layer rocky shell of earth
Thicker less dense outer shell
Thinner more dense outer shell
Hot solid that flows over time
Metallic liquid (iron)
Metallic solid
rigid/brittle outer shell of earth, composed of crust & upper mantle. Tectonic plates
Plastic capable of "float" hot mantle wells upward lifting lithosphere. Drives plate tectonics
Study of earths materials, changes on the surface and interior of the earth, and the forces causing those changes.
convergent plate boundary where plates move towards each other. Oceanic plates is denser & sinks into mantle.
Convergent plate boundary more dense. Oceanic plate older, cooler sink into mantle
Convergent plate boundary where plates are buoyant, neither plate subduct. Plates buckle & deform w vertical uplift
heat from sun, controls weathering of rocks (rock cycle)
Heat moving from hot interior to cooler exterior. Geospheric Phenomena (volcanism)
An ocean - ocean convergent plate boundary
Plates move apart, magma rises, cools and forms new oceanic crust. Expressed as mid-oceanic ridges
Plates slide past each other, fault zones, earthquakes mark boundary. ex: san Andreas fault
Tentative explanation or solution consistent with observed data
Hypothesis that passes rigorous testing, regarded as having excellent chance of being true.
Older events or objects, from first (oldest) to last(youngest)
Age of events or objects expressed as a number or numbers.
beds of sediment deposited in water are initially formed as horizontal or nearly horizontal layers
w/in an undisturbed sequence of sedimentary or volcanic rocks, layers get younger from bottom to top.
Original horizontal layer extends laterally until it tapers or thins edges
A surface (or contact) that represents a gap in the geologic record (erosion)
Some processes operating in the past are operating at present