chemicals:

4. a green chemical found in the chloroplasts of green plants, needed to carry out photosynthesis
10. a reaction of acid with a base, forming salt and water
11. single celled organisms that live in water
12. a process in which chemicals move
13. chemicals that take part in a chemical reaction
15. a green coating of copper hydroxide that is produced when copper reacts with moisture, carbon dioxide and oxygen in the atmosphere
16. hydrated iron (III) oxide
17. a biological catalyst that speeds up reactions

1. endothermic reaction that takes place in green plants. uses energy from sunlight to combine water and carbon dioxide and produces glucose and oxygen gas.
2. a simple sugar formed by photosynthesis
3. highly combustible chemicals
5. a rapid reaction with oxygen that releases energy in the form of heat and/ or light
6. a chemical reaction that absorbs energy
7. chemicals produced in a chemical reaction
8. a term commonly used for sodium chloride
9. a chemical reaction that releases energy
14. a way of protecting aluminium from corrosion, by deliberately creating a layer of aluminium oxide over it