Physics Unit 2 Study Guide

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Continental Crust

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Physics

11 Terms

1

Continental Crust

Crust that makes up continents; Composed of granite rock; Less Dense & Thick; Older

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2

Oceanic Crust

Crust found under the ocean; Composed of basalt rock; Denser & Thinner; Younger

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3

Radiometric Dating

An analysis of the data of an object based on the radioactive decay of the elements in the object

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4

Isotopes Half-Life

The amount of time for half of the original(unstable isotope) to change into the more stable isotope

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5

Plate Tectonics

Theory that states that pieces of Earth’s lithosphere are in constant, slow motion, driven by convection currents in the mantle

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6

Mid-Ocean Ridge

Long chains of underwater mountains extending the length of the ocean

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7

Trench

Long, curved valleys along the edges of some ocean basins

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8

Rift Valley

Places on Earth’s surface where the crust stretches until it breaks

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9

Accretion

When gravity causes matter to come together and form larger bodies

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10

Erosion

The act of water, ice, or wind moving, transporting, & depositing material to other locations

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11

Weathering

The breakdown or dissolving of rock into smaller pieces, by either chemical or physical processes

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