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Science Vocab

QuestionAnswer
composition the chemical makeup of a rock; describes either the minerals or other materials in the rock
continental crust is the land that is underwater or above land; the land we walk on
continental drift the hypothesis that states that the continents once formed a single landmass, broke up and drifted to their present locations
convection currents the cycle of warm air rising and cool air sinking
convergent boundary the boundary formed by the collision of two lithospheric plates
core the central part of the earth below the mantle
crust the tin and solid outermost layer of the earth above the mantle
density the ratio of a mass of the substance to the volume of the substance
divergent the boundary between two tectonic plates that are moving away from each other
earthquakes Quakes on Earth; when the tectonic plates deform creating a fault
asthenosphere the soft layer of the mantle on which the tectonic plates move
fault a break in a body of rock along which one block sides relative to another
fold the bending to rock layers due to stress in the earth's crust
geothermal energy the energy produced by heat within the Earth
Hot Spots a volcanically active area of earth's surface far from a tectonic plate
lithosphere the solid, outer layer of earth the consists of the mantle
lithosphere plates another name for tectonic plates
magma molten/melted rock
mantle the layer of rock between the Earth's crust and core
Mid ocean ridge a long, undersea mountain chain that forms along the floor of the major oceans
oceanic crust a crust that is thinner and denser than the continental crust
Pangea the continent we used to live on 245 million years ago
plate boundaries the boundary between 2 plates
plate tectonics the theory that explains how large pieces of the Earth's outermost layer, called tectonic plates, move and change shape
radioactive decay the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element
reverse boundary when rocks are pushed together by compression, reverse faults often form
sea floor spreading the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies
subduction the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
temperate the measure of how hot or cold something is; specifically, a measure of the average kinetic energy of the particles in an object
transform boundary the boundary between tectonic plates that are sliding past each other horizontally
volcanoes a vent or fissure in the Earth's surface through which magma and gases are expelled
Created by: JJ135642