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Midterm Vocabulary Review
Density Chemistry Earth Science
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Vocabulary List Density Mid Ocean Ridge Lithosphere Continental Drift
Continental Crust Relative Dating Oceanic Crust Radiometric Dating Convection Current Half-Life Geothermal Energy Igneous Rock Radioactive Decay Metamorphic Rock Convergent Boundary Sedimentary Rock Divergent Boundary Weathering Transform Boundary Erosion Sea Floor Spreading Constructive Forces Subduction Destructive Forces
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The idea that new sea floor is being made at ocean ridges and sea floor is being destroyed at ocean trenches. Sea Floor Spreading
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The process that happens at convergent boundaries where one plate sinks under the other plate and is melted back into magma. Subduction
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Measurement of how compact something is, how much matter is in a specific space.
Density
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Energy that comes from the heat energy inside the Earth.
Geothermal Energy
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Youngest type of crust, typically the thinnest but the most dense, constantly being destroyed and remade. Oceanic Crust
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A boundary where two tectonic plates are moving side by side.
Transform Boundary
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Processes that take away land or features from the Earth.
Destructive Forces
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Determining the age of something by comparing it to something else.
Relative Dating
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A boundary where two tectonic plates are coming together.
Convergent Boundary
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Circular movements of magma created by the heating of the mantle by the outer core. They are what cause the tectonic plates to move. Convection Currents
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The process by which rock is broken into smaller pieces by physical forces, chemical reactions, or living things. Weathering
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A boundary where two tectonic plates are moving apart.
Divergent Boundary
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Rigid part of the Earth the is made of the crust and the top part of the mantle. It is broken into pieces called tectonic plates. Lithosphere
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Underwater mountains where new sea floor is being made.
Mid Ocean Ridge
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Oldest type of crust, typically the thickest but the least dense crust.
Continental Crust
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The process that happens as unstable atoms fall apart and become more stable elements. This process is one of the sources of heat for the Earth’s core and also is used to help determine the exact ages of rock or fossils. Radioactive Decay
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Rock that is created when existing rock is changed by heat or pressure.
Metamorphic Rock
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Processes that add land or features to the Earth.
Constructive Forces
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The process by which rock is carried away by wind, water, or gravity.
Erosion
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The idea that the continents were once together and over time have moved apart.
Continental Drift
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Rock that is created when magma or lava cools and hardens.
Igneous Rock
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Rock that is created when tiny pieces of sediment get compacted and cemented together.
Sedimentary Rock
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The time it takes for half of a sample of radioactive atoms to decay into more stable atoms.
Half-Life
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Determining the age of something by determining how much radioactive decay has occurred.
Radiometric Dating
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