Energy Changes Crossword

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)

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.