Yr 7 Term 5 and 6 Key Words End of Term

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Across
  1. 5. Chemistry - Reaction of an acid with an alkali making a salt and water. The pH gets closer to 7.
  2. 6. Chemistry - Metals react with oxygen to form solid metal oxides
  3. 7. Physics - Energy sources formed million of year ago eg coal, oil, natural gas
  4. 9. Biology - A characteristic that can only have certain categories (e.g. blood type)
  5. 11. Physics - It will never run out
  6. 13. Physics - the useful energy given out divided by the total energy put in
  7. 18. Chemistry - Sour tasting chemical eg, vinegar
  8. 20. Biology - The egg nucleus and sperm nucleus join together in the oviduct
  9. 23. Chemistry - Reversible changes (e.g. dissolving, melting) which aren’t reactions
  10. 26. Chemistry - A more reactive metal element takes the place of a less reactive metal in its compound
  11. 30. Biology - Period of time when a child develops into an adult
  12. 31. Physics - When energy is transferred to wasted energy store (e.g. a light bulb heating up)
  13. 32. Biology - Differences in characteristics within species or between species
  14. 33. Biology - Characteristics which enable an organism to be successful and survive (eg thick fur for warmth; spiny leaves to protect & save water; camouflage)
  15. 35. Physics - Energy which is not useful (often heat to surroundings)
Down
  1. 1. Chemistry – A Reaction that forms a salt and hydrogen gas
  2. 2. Chemistry - Substance which is formed/made
  3. 3. Physics - Energy can’t be used again (it will run out)
  4. 4. Chemistry - Substance we start with
  5. 8. Physics - Energy cannot be created or destroyed –only transferred.
  6. 10. Chemistry - Changes colour to show how strong or weak an acid or alkali is
  7. 12. Biology - Ball of cells formed when the fertilised egg divides several times
  8. 14. Chemistry - Atoms in the reactants are rearranged to make products
  9. 15. Biology - A characteristic that can take any value within a range (e.g. height)
  10. 16. Chemistry - Contains dye which changes colour to identify acid or alkali.
  11. 17. Biology - Nine months between fertilisation and birth when the foetus grows.
  12. 19. Biology - Members of the same species can mate to produce fertile offspring
  13. 21. Physics - Energy generation methods that will not run out
  14. 22. Biology - Physical changes of an adolescent
  15. 24. Biology - Sperm (male) and egg (female) cells
  16. 25. Physics - How much energy is transferred per second, measured in Watts.
  17. 27. Chemistry - Chemical opposite of an acid eg soap, bleach, toothpaste
  18. 28. Chemistry - High if lots of acid/alkali particles and few water particles
  19. 29. Biology - 28 day cycle run be hormones in females
  20. 34. Chemistry - Lower pH values mean more acidic, Higher pH means more alkaline