Year 8 Autumn

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Across
  1. 3. a substance that speeds up another reaction without being used up or changed itself
  2. 5. Enzyme that speeds up the digestion of starch into sugars
  3. 7. substance used to test for the presence of Carbon Dioxide
  4. 13. name given to the combination of more then one element chemically bonded together
  5. 14. substance that neutralises stomach acid to give a high pH for later digestive enzymes to work better
  6. 15. a group of specialised cells with a similar structure and function
  7. 18. The flow of charge around a circuit
  8. 19. The proper name for the process commonly called 'burning'
  9. 20. When two components are connected in a circuit so the current is the same in them both they are connected in...
  10. 21. The unit of current
  11. 22. name given to the combination of more then one element NOT chemically bonded together
  12. 23. system a group of organs that work together to carry out a specific function
  13. 24. The least reactive metal
Down
  1. 1. When two components are connected in a circuit so the current is split between them they are connected in...
  2. 2. a substance that cannot be broken down into any other substance
  3. 4. The type of reaction where a more reactive metal replaces a less reactive metal in a compound
  4. 6. The unit of resistance
  5. 8. a charged atom or molecule
  6. 9. Substance that creates a salt when reacted with a metal
  7. 10. small negatively charged particles that orbit the nucleus in an atom
  8. 11. biological catalysts, usually proteins
  9. 12. the unit of potential difference
  10. 16. the breakdown of the molecular structure of a protein so that it no longer functions
  11. 17. The process by which a compound reacts with oxygen
  12. 23. a collection of different tissues working together to carry out a specific function