Earth's Forces

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Across
  1. 1. movement of tectonic plates that create earthquakes
  2. 7. the process where two species influence each others evolution
  3. 8. a space rock that stays in form making its way all the way to earth's surface
  4. 11. opposite of biotic
  5. 12. the time it takes for Half of a substance to decay
  6. 13. maps that represent the dimensional surface features
  7. 15. a stable part of earth's crust
  8. 19. absence of oxygen
  9. 20. method of determining the age of rocks using radioactive isotopes
Down
  1. 2. study of earths structure
  2. 3. relating to the rigid outer layer of earth's structure
  3. 4. describes the movement of organisms alongside earth's evolving systems
  4. 5. gradual movement of earth's lithospheres
  5. 6. process that requires oxygen
  6. 9. atoms of the same elements but with different number of neutrons
  7. 10. Earth's outermost layer
  8. 14. the study of earth's past magnetic fields recorded in rocks
  9. 16. A method of dating that uses the decay of radioactive isotopes
  10. 17. ground shaking occurrence cause by release of energy
  11. 18. referring to the living components of an ecosystem