Across
- 1. This layer is solid nickel and iron
- 3. The attraction between two or more objects (keeps our feet on Earth)
- 4. This subatomic particle number is the atomic number
- 5. This type of diagram shows valence electrons
- 7. Water moving across the surface
- 11. Water goes from a gas to a liquid
- 12. Dominoes are an example of these
- 15. Fe on the periodic table
- 18. Neutral subatomic particle
- 22. Heat is released in this type of reaction
- 25. These are pure substances
- 26. Water goes from liquid to a gas
- 27. The electrons in the outer shell
- 28. Type of plane used in Rube Goldberg machines
- 30. Two or more elements
- 31. Lighting a match is this type of change
Down
- 2. Heat is absorbed in this type of reaction
- 6. Water exits the leaves of trees
- 8. This subatomic particle has a negative charge
- 9. Measurement for Work
- 10. Objects in motion stay in motion until acted upon
- 13. Hg on the Periodic Table
- 14. This turns off and on the flow of electricity
- 16. Breaking wood into pieces is this type of change
- 17. The Earth is an example this type of magnet
- 19. Carbon dioxide and water are examples of this in photosynthesis
- 20. Important to humans and has 6 valence electrons
- 21. Gravity on earth is 9.81 m/s2
- 23. Stored energy
- 24. Energy in motion
- 29. Measurement for force