Year 10 science revision

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Across
  1. 3. a change in a substance that does not change the identify of the substance
  2. 9. positively charged particle
  3. 11. a change in a substance that results in a new substance being formed
  4. 14. increasing the dissolved reactants increases the ...
  5. 16. a quick reaction
  6. 17. the rate of reaction depends on the ______________ of collisions between particles
  7. 18. a substance that lowers the reactions activation energy so speeds up the reaction
Down
  1. 1. the minimum amount of energy needed for the particles to react
  2. 2. the type of reaction where a molecule breaks down to make simpler ones
  3. 3. a solid that forms
  4. 4. the type of reaction where two or more compounds combine to form one compound
  5. 5. the speed of a reaction
  6. 6. negatively charged ion
  7. 7. charge on a ionic compound
  8. 8. the smaller the pieces of reactant the ______________ the surface area
  9. 10. substances that are formed in a chemical reaction
  10. 12. a substance that is made of two or more elements bonded together
  11. 13. the measure of how well one substance dissolves in another
  12. 15. by increasing this the particles have more energy so they collide more