Across
- 2. A feature that might appear near plate boundaries
- 4. An atom that has lost or gained electrons
- 5. The name given to the plates that make up the crust
- 9. Another word for a chemical that is added in a reaction
- 11. The type of table used to show all the elements that exist
- 12. Protons and neutrons combined
- 17. The number of protons in an atom
- 19. The center of the Earth
- 21. Types of circular currents that occur when hot molten rises, cools, falls causing the crust to move
- 22. Evidence of plant and animal matter preserved in rocks
- 24. Negative subatomic particles that orbit the nucleus of atoms
Down
- 1. A type of compound that forms when a positive ion and a negative ion combine in a reaction
- 3. A metal that bonds with carbon and oxygen. Also known as marble
- 6. A neutral subatomic particle found inside the nucleus of atoms
- 7. A process where rocks are broken down by physical or chemical means
- 8. Part of an experiment where you analyse what worked and what could be improved on
- 10. Used when writing chemical equations
- 13. A type of plate interaction where one plate moves under another
- 14. The variable that is measured when carrying out an experiment
- 15. Frozen carbon dioxide
- 16. A positive subatomic particle found inside the nucleus of atoms
- 18. Evidence of a gas produced during a chemical reaction
- 20. Colour of light given off when magnesium reacts with oxygen
- 23. One example of a state of matter
- 25. The symbol for lithium