Geologic Time Crossword Puzzle

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QUESTIONS LIST:

relative dating : approximate age given to a rock layer based on it's position
erosion : the process by which wind, water, ice, gravity, or other natural forces move sediment over earth's surface
stratigraphy : study of rock layers to determine geologic history
isotope : an atom of the same element that has a different number of neutrons in its nucleus and, therefore, a different mass
absolute dating : an exact age given to a rock layer or fossil based on it's isotope decay
parent : an unstable isotope
half life : the amount of time it takes for half an isotope to decay
sediment : small pieces of eroded rock that is moved by wind or water,
superposition : law stating that older rock layers are found at the bottom
geologic column : column created to determine age of rocks and fossils
daughter : a stable isotope
radioactive decay : the decay of an isotope