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ESPS Vocab


Absolute Age The age of a rock given as the number of years since the rock formed.
Asteroid A small rocky body orbiting the sun
Asthenosphere The soft layer of the mantle on which the lithosphere floats.
Carbon Dating Determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains.
Comet A ball of frozen dust and rock that orbits the sun and has a tail that glows
Core Center of the Earth.
Crater A large, bowl shaped indent in the ground or surface of a planet or moon.
Crust The thin and solid outermost layer of the Earth above the mantle.
Ejecta Material that is forced out.
Geologic Time Scale A record of the geologic events and life forms in Earth's history.
Half Life Time it takes for half of an isotope to decay
Isotope Atoms of the same element that have different numbers of neutrons
Law of Superposition In a sequence of layered rocks, the older rocks will be under the younger (newer) rocks.
Lithosphere Outer part of Earth, crust and upper mantle.
Mantle The layer of hot, solid material between Earth's crust and core.
Mesosphere The strong, lower part of the mantle between the asthenosphere and the outer core.
Meteorites A meteoroid that passes through the atmosphere and hits Earth's surfac
Meteoroids Chunks of rock or dust from space
Radiometric Dating A method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
Relative Age The age of a rock compared to the ages of rock layers
Strata Layers of rock
Uniform-ism Charles Lyeu's principle that states the mechanisms of change are constant
Volcanic Arc A chain of active volcanoes formed adjacent to a convergent plate boundary.
Volcano A weak spot in the crust where magma has come to the surface.
Oceanic Crust Earth's crust under the ocean.
Created by: barajasx