Across
- 3. A period of one houndred years.
- 4. Something eith a numerous quantity.
- 9. A record of geologic events.
- 10. When a organism have only one type of cell.
- 11. Object to small to be considered a planet.
- 12. Three long units of time.
Down
- 1. Used in science to compare size or measure proportions.
- 2. Earth´searliest era, before complex life appeared.
- 5. To repare or remodel something.
- 6. A graphic representation of the past of time.
- 7. Units of geological time.
- 8. The study of rocks.