Across
- 2. an intelligent guess
- 5. the rate of change of velocity
- 9. a push or pull
- 12. positive charge
- 14. columns on the periodic table
- 15. element with a mass number of 40 and 22 neutrons
- 16. negative charge
- 17. rows on the periodic table
- 19. no charge
Down
- 1. used in laboratory experiments to measure fluids
- 3. distanne traveled per unit time
- 4. resistant force when object touches each other
- 6. contains neutrons and protons
- 7. SI unit for mass
- 8. mass multiplied by velocity
- 10. speed in a given direction
- 11. the smallest indivisible particle of matter
- 13. holds electrons around the nucleus
- 18. the tendency for an object to resist a change in motion
- 19. sum of all forces acting on an object