1
2
3
4
5
6
7
8
9
Across
- 2. The act of moving or changing position
- 4. A pattern of energy moving through space or matter
- 7. A substance made of two or more elements bonded together
- 8. A tiny particle of light energy
- 9. A community of living things and their environment working together
Down
- 1. A state of matter that flows and takes the shape of its container
- 3. The central part of a cell that controls its activity
- 5. A pure substance made of only one type of atom
- 6. The upward force that makes things float in water