Year 8

3. Acid that when reacted with Iron produces Iron Sulphide
5. A substance that cannot be broken down into any other type of substance
12. The type of reaction where a more reactive metal replaces a less reactive metal in a compound
14. way of connecting electrical components in a circuit so that the current splits between them
16. electric charge stored on an object that does not move
21. The proper name for the reaction commonly known as 'burning'
22. Enzyme that speeds up the digestion of starch into sugar
23. negatively charged particles that move aroun the nucleus of an atom
26. A substance that speeds up the rate of another reaction, without being used up
27. the unit of resistance
29. a collection of different tissues working together to carry out a specific function
30. A collection of different tissues working together to carry out a specific function

1. Substance used to test for the presence of Carbon Dioxide
2. A substance made of two or more different elements chemically bonded together
4. a measure of energy transferred to a component by each charge that passes through it
6. The least reactive metal
7. the unit of current
8. neutralises stomach acid to give a high pH for the digestive enzymes to work
9. The breakdown of the molecular structure of a protein so that it no longer functions
10. a measure of how difficult it is for current to flow through a component
11. Flow of charge
13. a material that doesn't conduct electricity
15. A group of specialised cells with a similar structure and function
17. a material that does conduct electricity
18. Substance that produces a salt when reacted with a metal
19. Second word in the name of a compound that contains carbon and oxygen
20. way of connecting electrical components in a circuit where the current is the same
24. The process by which a compound reacts with oxygen
25. the unit of potential difference
28. a charged atom or molecule