Across
- 2. size equal in size
- 4. mass chemical unchanged
- 10. negative charge of a particle
- 12. force that attends to draw together any two objects
- 13. push or pull
Down
- 1. Size of displacement between two positions
- 3. an element in period 2 group 1
- 5. Average of many measurements
- 6. Anything that has volume or mass
- 7. + and - charges
- 8. due to motion
- 9. a row in a periodic table
- 11. When water covers to much of land