Across
- 2. Preserved remains of an ancient creature or organism that was on Earth.
- 4. A theory that states that the geological processes that shape Earth are uniform through time.
- 5. A group of living things that reproduce offspring.
Down
- 1. The theory of this states that natural disasters such as floods and volcanic eruptions have happened often during all of Earth's history.
- 3. The scientific idea that major changes and the Earth's developments in the natural world happen at a slow pace through long periods of time.