Across
- 4. Very small living things, some are good, some are bad.
- 6. The part of the cell that controls everything.
- 7. Everything in space, including stars and planets.
- 9. A small part that makes proteins.
- 10. The way animals and plants change over time.
Down
- 1. The start of the universe.
- 2. A big object that moves around a star.
- 3. The basic unit of life.
- 5. A very simple cell, like bacteria.
- 8. A very old part of an animal or plant in rock.