1
2
3
4
5
6
7
8
9
10
Across
- 2. Smallest discrete unit of energy
- 6. Solid with ordered atomic structure
- 8. One body blocking another in space
- 9. Center of an atom or cell
- 10. Positively charged particle
Down
- 1. Slow-moving river of ice
- 3. Uncharged particle in nucleus
- 4. Wearing away of land by water or wind
- 5. Large molecule essential for life
- 7. Preserved remains of ancient life