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theory that the continents were at once one or more times a single landmass that broke apart and eventually moved into the positions they are in today.
theory of plate tectonics
theory that Earth's crust is broken into plates that float on the upper part of the mantle.
mountain formed when upfolds in rocks created a rounded structure that looks like a bowl turned upside down.
natural fuel that was formed from the remains of living things, such as: coal, oil, or natural gas
length of time it takes for one-half the amount of a radioactive element to change into a stable element
law of superposition
states that each undisturbed sedimentary rock layer is older than the layer above it
large body of igneous rock that can form into different shapes when magma cools inside Earth's crust
series of natural processes by which rocks are slowly changed from one kind of rock to another kind of rock
simple substance that cannot be broken down into simpler substances by ordinary chemical means
naturally occurring, inorganic solid formed from elements or compounds and having a definite chemical makeup and regular atomic structure
process that occurs when elements and compounds leave a solution and crystallize out as solids
mixture in which the particles of one substance are evenly mixed with the particles of another substance
number in a chemical formula that shows how many of each atom are in one molecule of a compound
line on a map or a globe running fron the North Pole to the South Pole along Earth's surface
horizontal line on a map or globe that circles Earth from east to west at intervals starting at the equator
forward edge of a cold air mass, formed when a cold air mass pushes under a warm air mass
amount of water vapor in the air compared with the amount of water vapor the air can hold at capacity
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