science vocab

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Across
  1. 2. scientific study of past life through fossils is known as _______.
  2. 5. variety of different species within an ecosystem.
  3. 7. study of the structure of organisms
  4. 9. of life in an ecosystem
  5. 10. of ancient organisms
Down
  1. 1. process of turning organic material into stone is called _______.
  2. 3. permanent disappearance of a species
  3. 4. process of rotting or decomposition
  4. 6. diagram that shows evolutionary relationships among species
  5. 8. undergo change over time is to _______.