Evolution!

1. different animals change to be more similar to each other
4. a scientist who thought that animals change because they try hard to be better at living
10. animals that are best at living in their homes have babies and pass on their good traits
13. the study of bones and fossils
14. when one kind of animals changes so much that it becomes a new kind
15. two animals starting from the same kind but change to live in different ways
17. body parts that used to be useful, but aren't needed anymore

2. changes that happen slowly over time
3. a kind of plant or animal is completely gone
5. a change in a gene
6. differences between living things like size or color
7. two living things change together because they need each other
8. a group of living things that are the same kind
9. tiny things in our DNA that tell us how we look and grow
11. something special a plant or animal has that helps it live
12. a scientist who said that animals change over time to help them live better in their homes
16. the way living things slowly change over time