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K-Earth Science

History of Earth

fossil A trace of an ancient organism that has been preserved in rock.
oxygen a gas that has no color or smell, is present in air, and is necessary for most animals and plants to live. Ex. the chemical symbol for _____ is O.
glacier Any large mass of ice that moves slowly over land
expand to open up, make or grow larger; to develop
melt change from a solid to a liquid
Earth Third planet from the sun
movement an act of changing physical location or position or of having this changed.
water A liquid made of hydrogen and oxygen.
rain water falling in drops from vapor condensed in the atmosphere
equator An imaginary circle around the middle of the earth, halfway between the North Pole and the South Pole