Across
- 4. when water turns to gas
- 7. time it takes for half a radioactive material to decay
- 9. in a triangle with velocity and time
- 11. an atom with different numbers of neutrons
- 12. is a good conductor and is in wires
Down
- 1. it's symbol is v
- 2. holds us to the earth
- 3. can look at a skeleton
- 5. speed with direction
- 6. in the center of an atom
- 8. how to measure energy
- 10. amount of electricty going through a curcuit