Beagle

The British naval ship that set sail from England on a five-year-long trip around the world. Charles Darwin was aboard the ship, and made his most important discoveries on it.

A group of similar organisms that can mate with each other and produce fertile offspring.

A trait that helps an organism survive and reproduce.

The gradual change in a species over time.

A well-tested concept that explains a wide range of observations.

Darwin's first book that explained his observations and discoveries which led to his scientific theory.  This book was very controversial because it didn't support what the bible stated about the creation of man.

Natural Selection

The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species. He identified that overproduction, competition, and variations affect this process.

Variation

Any difference between individuals of the same species.

The very slow motion of the continents.