Across
- 3. a reaction between an acid and an alkali (14)
- 6. the breakdown of rock into smaller pieces (10)
- 8. type of rock formed from cooled magma (7)
- 9. a word that describes what is made in a chemical reaction (8)
- 10. type of rock formed by heating or compressing other rocks (10)
- 11. acid found in the stomach (12)
- 12. a blue substance containing copper, sulfur and oxygen (6,7)
- 15. a reaction where you burn a fuel (10)
- 16. a poisonous gas formed by a car engine (6,8)
- 19. can be hammered/bent into different shapes (9)
Down
- 1. when a lit splint is put into this gas a popping sound is heard (8)
- 2. changes colour in acid and alkali solutions (9,9)
- 4. remains of plants or animals sometimes seen in sedimentary rocks (7)
- 5. the reaction of a metal with oxygen in the air (9)
- 7. a reaction where a more reactive substance substitutes a less reactive substance from solution (12)
- 13. solution used to test for carbon dioxide gas (9)
- 14. what is formed when two or more different atoms bond together (8)
- 17. gas needed for a fuel to burn
- 18. a substance made up of one type of atom (7)