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When rocks are broken down without any change in he chemical nature of the rocks, they are torn apart by physical force

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The end of a group of organisms.

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Land mass that existed when all continents were jointed together.

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Region of space where matter has collapsed in on its self

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Process where rock is worn away or broken down into smaller pieces.

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The earliest period of the mesozoic era.

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Erosion is when sediments are picked up and moved to another place by: Water,wind, and gravity

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Climate change is a change in the statistical distribution of weather patterns when that change lasts for an extended period of time.

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The Paleozoic was a time of dramatic geological, climatic, and evolutionary change.

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A term used by paleontologists  to refer to the total number of fossils that have been discovered, as well as to the information derived from them.

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Size or extent of something .

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Sudden violent movement of the Earths surface.

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Type of where two plates slide against each other in a sideways motion.

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Where two tectonic plates move away from one another

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The two plates coming together push against each other and one is forced down beneath the other

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Location where two tectonic plates interact.

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The lateral movement of continents

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Plates that make up the surface of the Earth

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The central portion of the Earth composed mainly of iron and nickle.

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The portion of the Earth between the crust and core.

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The outer layer of the Earth

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The crust and upper mantle of the Earth

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Region below the lithosphere in wich the rock is less rigid than above and below

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Converted into stone or a stony substance.

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Any remains or trace of a living thing of a former geologic age, as a skeleton or footprint

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Long cylinder of material obtained by use of a core drill

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The Geological Time Scale is a system of chronological dating that relates geological strata to time and is used by scientists to describe the timing of events that occured during earths history

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Paleo-oncology is the study of carcinomas and sarcomas in ancient human populations and their hominid precursors.

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An Archeologist is a person who studies human history and prehistory through the excavation of sites and the analysis of artifacts and other physical remains.

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Paleontolgy is the branch of science concerned with fossil animals and plants.

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Stratigraphy is the branch of geology concerned with the order and relative position of strata and their relationship to the geological time scale.

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A layer of material, one of a number of parallel layers one upon another.

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An expert student of astronomy.

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The state of not being acted on by gravity.

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The weight of an object is the force of gravity on the object and may be defined as the mass times the acceleration of gravity.

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Mass is the amount of matter in an object.

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The definition of revolution is the movement of one object around a center or another object.

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Rotation is the process or act of turning or circling around something.

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A season is a division of the year marked by changes in weather, ecology, and amount of daylight.

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Asteroids are small, airless rocky worlds revolving around the sun that are too small to be called planets.

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A gas giant is a giant planet composed mainly of hydrogen and helium.

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A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals.

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Nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

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Gravity  is a natural phenomenon by which all things with mass are brought toward (or gravitate toward) one another, including planets, stars and galaxies, and other physical objects.

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A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

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A point at which a function takes an infinite value, especially in space-time when matter is infinitely dense, as at the center of a black hole.

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The Big Bang theory is the prevailing cosmological model for the universe, from the earliest known periods through its subsequent large-scale evolution.

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The light-year is a unit of length used to express astronomical distances.

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The Milky Way is the galaxy that contains our Solar System.

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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.