Across
- 4. Breaking down a molecule using heat
- 5. The second layer of the earth's structure, it is mostly solid
- 6. Molten Rock above the surface of the earth
- 12. 'Plates' that are thicker than the earth's crust
- 15. Rocks formed by layering of material under water
- 17. What is mixed together at the start of a chemical change
- 18. A reaction where a more reactive atom is added to a molecule
- 19. Always added to reactants in oxidation reactions
- 20. Molten Rock below the surface of the earth
- 21. Represented by Na in the periodic table
- 22. The third layer of the earth's structure, it is mostly liquid
- 24. A chemical change where atoms are rearranged
Down
- 1. Adding oxygen to a metal slowly over many years. Rust.
- 2. The law of the ... of mass
- 3. Adding oxygen to a molecule by setting it on fire
- 5. Something which cannot be created or destroyed in a chemical change
- 7. A reaction where oxygen atoms are added to a molecule
- 8. A chemical substance rocks are made out of
- 9. Represented by H in the periodic table
- 10. The top most layer of the earth's structure
- 11. What is made in a chemical change
- 13. The central layer of the earth's structure
- 14. Represented by C in the periodic table
- 16. Rocks formed from other rocks due to high heat and pressure
- 23. Rocks formed by the cooling of molten rock