Geological Time Layers Crossword Puzzle

QUESTIONS LIST:

• fossils : prehistoric remains
• time : it's relative
• scale : used to weigh things
• isotope : same number of protons in the nucleus
• sedimentary : the material from a liquid that settles to the bottom
• physical : opposite of spiritual
• radioactive : used to date rocks
• death : final stage of life
• carbon : element with atomic number 6
• proton : positive, and found in a cell
• graphite : found in pencils
• nucleus : control center of a cell
• evolution : theory of how things came to be
• chemical : a compound or substance
• geological : relates to the study of earths physical structure and substance
• billions : how many years old the earth is
• layers : an onion has _ .
• canyon : grand _ .