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