something that is different in a living thing compared to others
variation
what is left behind from dead plants and animals
fossil
to change to fit into an environment
adapt
fossils people have found and what they tell us about life on Earth in the past
fossil record
scientists who study fossils and early life on Earth
paleontologists
a group of living things that are similar and can make offspring with each other
species
coloring that allows a living thing to blend into its surroundings
camouflage
a picture or graph that shows how time has passed
timeline
not existing or alive anymore
extinct
a large group of reptiles that are extinct
dinosaurs
