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Earth Science Crossword Puzzle

Across
Character that describes matter.
Rocky object, smaller than a planet, orbits a star.
Process in which minerals combine with oxygen to form new substances.
Movement of one object in its orbit around another object in space.
Instrument that detect and records earthquake waves.
Igneous rock that forms underground from cooled magma.
Line of 0 latitude halfway between the poles.
Scientist who studies the solid parts of the earth and how they change.
Everything that exists.
List of map symbols and their meaning.
Down
Low, flat, area that a river covers when it overflows its banks.
Organism that live on the ocean floor.
Severe tropical storm with high winds that revolve around an eye.
Unit for measuring angles in a circle or sphere.
Type of fossil that forms when minerals fill a mold.
Outermost layer of the atmosphere.
Breaking down of rocks on the earth's surface.
Atom's center, which is made of protons and neutrons.
Low, flat plains on the moon's surface as seen from above.
Mountain that develop where magma pushes up through the earth's surface.