Change Over Time Crossword

5. Information about past life, including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived
7. A term that typically describes a species that no longer has any known living individuals.
9. Happens on a scale that transcends the boundaries of a single species
12. The gradual change in a species over time
13. Scale used by paleontologists to represent evolutionary time
14. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
15. Structures in different species that are similar because of common ancestry.
16. A well-tested explanation for a wide range of observations or experimental results.

1. The preserved remains or traces of an organism that lived in the past
2. A family tree that shows the evolutionary relationships thought to exist among groups of organisms
3. Any difference between individuals of the same species.
4. A technique used to determine the actual age of a fossil on the basis of the amount of a radioactive element it contains
6. A trait that helps an organism survive and reproduce
8. English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
10. Method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock
11. Happens on a small scale (within a single population).