Change Part A: Chemical Change

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Across
  1. 6. – A sign that shows a reaction has happened (e.g. bubbles, colour change)
  2. 8. – When a substance is altered, physically or chemically
  3. 10. – When a seed starts to grow
  4. 13. – A reaction where oxygen + fuel produce heat and light (e.g. burning)
  5. 16. – Process that turns sugar into energy for cells (e.g. happens in your muscles when you exercise)
  6. 18. – A substance you start with before a reaction
  7. 19. – Process where plants use sunlight to make sugar
  8. 20. – A reaction where a substance gains oxygen
Down
  1. 1. – A reaction where one substance breaks into smaller ones (e.g. hydrogen peroxide → water + oxygen)
  2. 2. equation – Writing a reaction using chemical symbols (e.g. H₂ + O₂ → H₂O)
  3. 3. – A substance made of two or more different elements joined together
  4. 4. – A new substance formed after a reaction
  5. 5. – A solid that forms when two liquids react
  6. 7. – A reaction that releases heat (e.g. burning wood)
  7. 9. – A reaction that absorbs heat (e.g. cooking an egg)
  8. 11. – A reaction where small substances join to form one bigger substance (e.g. iron + oxygen → rust)
  9. 12. equation – Writing a reaction using the names of substances (e.g. hydrogen + oxygen → water)
  10. 14. – The force that holds atoms together in a substance
  11. 15. – Process where yeast turns sugar into alcohol, CO2 and energy
  12. 17. – Metal wearing away due to a chemical reaction (e.g. rust)