Across
- 5. A reaction between an acid and a base or an acid and an alkali, forming a salt and water (2 words)
- 7. Cutting down large areas of trees.
- 8. A process that involves rearrangement of atoms to produce new substances. (2 words)
- 10. A reaction that takes in energy from the surroundings.
- 11. Another word for potential difference.
- 14. The minimum amount of energy that particles must have to react. (2 words)
- 16. At risk of becoming extinct or wiped out.
- 20. A reaction in which a single reactant breaks down when heated, forming two or more products. (2 words)
- 21. The amount of energy needed to break a bond, or the amount of energy released when a bond is made. (2 words)
Down
- 1. A reaction between a substance and oxygen in the air. The scientific word for burning.
- 2. A type of pollution, the sea is filled with this.
- 3. Another name for reaction profile. (3 words)
- 4. Something that happens on 22nd April, every year. Started in 1970. (2 words)
- 6. The flow of electrical charge. (2 words)
- 9. An attraction between atoms, ions or molecules that enables the formation of chemical compounds.
- 12. A graph showing the relative energies of reactants and products, the activation energy and the overall energy change. (2 words)
- 13. A measure of how reactive a substance is.
- 15. A list of elements arranged in order of reactivity, with the most reactive elements at the top and the least reactive element. (2 words)
- 17. A reaction that transfers energy to the surroundings.
- 18. The unit used to measure energy change
- 19. The loss of electrons from a substance or the gain of oxygen by a substance.