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Across 1. A centrifuge does what to separate substances? 3. H2O 6. The lightest element in the periodic table 8. A particle that has no charge. Found in atoms. 9. Pure substance, made from only one type of atom 11. The point at which a liquid changes into a gas 15. Na 16. A type of mixture where you cannot see the different parts. 18. This type of mixture will settle out when left to stand. 21. The type of change that cannot be reversed and results in the production of new substances 22. Particles in solids do this faster as they are heated 23. The chemical symbol for Gold 27. The type of mixture that is transparent 31. Negatively charged particle in atoms 32. A type of colloid 33. A substance that is a combination of two or more pure substances that can be physically separated 34. A type of separation that uses filters to separate insoluble substances from a liquid 35. The substance that passes through a filter

Down 1. The state of matter that water is in at -5 degrees Celsius 2. Positively charged particles in atoms 4. All matter is made form these 5. The name given to substances that react with each other in a chemical equation 7. A type of separation used in gold panning 8. The part of an atom that contains neutrons and protons 10. A word used to describe a substance that does not dissolve 12. Mg 13. The term used to describe forces that hold atoms together 14. Another word for freezing 17. The substance that is dissolved by a solvent in a solution 19. A word used to describe something that dissovles 20. The term given to the energy of moving things 21. A substance made from two or more elements 24. The substances produced in a chemical reaction 25. A type of separation that can be used to separate metals from non-metals 26. The material that settles at the bottom of a container when a suspension if left to settle 27. This will speed up a chemical reaction 28. The type of change that is usually a change in state, shape or size 29. A substance that speeds up chemical reactions, but doesn't take part in the reaction 30. The point at which a solid turns into a liquid 31. Solids, liquids and gases do this when heated