Science wk 10

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Across
  1. 4. The process of rusting of iron due to its reaction with oxygen and water. (10 letters)
  2. 5. A reaction that occurs spontaneously and releases energy. (11 letters)
  3. 7. The substance that speeds up a reaction by providing an alternative reaction pathway. (9 letters)
  4. 10. The balanced chemical equation representing a reaction. (10 letters)
  5. 14. A reaction that absorbs energy from the surroundings. (11 letters)
  6. 16. A substance that speeds up a chemical reaction without being consumed itself. (9 letters)
  7. 17. The minimum energy required for a chemical reaction to occur. (10 letters)
  8. 18. The number of atoms of each element in a molecule. (9 letters)
  9. 19. REPLACEMENT type of reaction where two compounds exchange ions to form new compounds. (12 letters)
  10. 21. A reaction in which a single compound breaks down into two or more simpler substances. (13 letters)
  11. 23. The process of breaking down organic molecules to release energy. (11 letters)
  12. 24. The process of combining hydrogen and oxygen to produce water. (8 letters)
  13. 25. The process of combining two or more substances to form a new compound. (12 letters)
Down
  1. 1. A reaction in which electrons are transferred from one substance to another. (13 letters)
  2. 2. A reaction that involves the exchange of electrons between reactants. (13 letters)
  3. 3. A reaction in which a metal displaces another metal from its salt solution. (14 letters)
  4. 6. A reaction that releases energy, often in the form of heat or light. (14 letters)
  5. 8. A reaction between an acid and a base, resulting in the formation of water and a salt. (13 letters)
  6. 9. A reaction that involves the transfer of protons (H+ ions). (12 letters)
  7. 11. What is the process by which substances are broken down or built up in the body? (10 letters)
  8. 12. The substance that is dissolved in a solution. (8 letters)
  9. 13. The process of converting light energy into chemical energy in plants. (9 letters)
  10. 15. The process of breaking down organic molecules to release energy. (11 letters)
  11. 20. A reaction in which the reactants and products are in the same physical state (solid, liquid, or gas). (13 letters)
  12. 22. The study of the rates of chemical reactions. (11 letters)