Biology

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Across
  1. 2. what we have been working on, a way of classification
  2. 3. a personal point of view
  3. 7. time required for half of a radioisotope atoms to decay
  4. 8. the idea that evolution proceeds slowly and steadily
  5. 10. an explanation of a wide range of phenomena
  6. 12. inventor of the binomial nomenclature system
  7. 13. the term for a species that has died out
  8. 14. tentative scientific explanation that can be tested
  9. 15. the molecule that contains the codes for life
Down
  1. 1. the observations gathered in a scientific experiment
  2. 2. when 2 species evolve over time in response to each other
  3. 4. a signal to which an organism responds
  4. 5. the scientist who voyaged around the world and wrote On the Origin of Species
  5. 6. the study of life
  6. 9. tells you what happens in a scientific observation
  7. 11. Plate _____________ is the study of the movement of the Earth's crust