Across
- 2. small amounts of other substances within the 'main' substance
- 6. Melting and recasting or reforming into different products.
- 9. An absence of oxygen. A process that does not require oxygen.
- 10. When the value of a measurement is close to the true value.
- 12. the sum of all values divided by the total number of values
- 13. a substance that speeds up a reaction by offering an alternative pathway with a lower activation energy.
- 17. is the steepness and direction of a line as read from left to right
- 18. A process to separate a liquid solvent from a mixture and collect it
- 19. A suspension of particles in a liquid formed when a dissolved substance reacts to form an insoluble substance, eg in a precipitation reaction.
- 20. A limited amount of something. It will run out eventually.
- 21. A compound made of only hydrogen and carbon
- 22. An unsaturated hydrocarbon
Down
- 1. Can be replaced at the same rate they are being used up.
- 3. a single element or compound, not mixed with any other substance
- 4. A chemical reaction that gives takes in energy from the surroundings
- 5. a mixture that has been designed as a useful product.
- 7. The number of molecules of a substance in a given volume.
- 8. physical signs, documents, images, etc, suggesting a certain theory is true
- 10. A saturated hydrocarbon
- 11. fine solids or liquid particles suspended in air that are individually invisible to the naked eye
- 14. the process by which green plants and some other organisms use sunlight to create glucose and oxygen from water and CO₂
- 15. A chemical reaction that gives out energy to the surroundings
- 16. With oxygen. Relating to, involving or requiring oxygen.