Across
- 4. You can separate the different elements easily.
- 8. Is produced by movement.
- 12. Are unlimited and will never run out.
- 14. Makes up everything you can see.
- 15. Is produced by vibrations.
- 16. Makes machines work.
- 19. It is not always possible to separate the different elements.
- 20. When the ice is heated, it becomes water (liquid).
- 21. It means that it dissolves in liquids.
Down
- 1. It is made up of two or more pure substances.
- 2. Is the fastest form of energy.
- 3. Are limited and cannot be replaced.
- 5. Is the amount of space an object occupies.
- 6. Refers to how difficult a material is to scratch and change shape.
- 7. Natural materials which go through a chemical transformation.
- 9. When the substance can change back to its original state.
- 10. Is the relationship between the mass and the volume of an object or substance.
- 11. Is the amount of matter something contains.
- 13. When the water is cooled, it becomes ice (solid).
- 17. When water vapour is cooled, it becomes water (liquid).
- 18. When water is heated, it becomes water vapour (gas).