Y9 Chemistry Crossword

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Across
  1. 4. the large numbers in front of molecules in a chemical equation.
  2. 6. type of change where a new substance has formed.
  3. 10. when the correct number of atoms are present on both sides of the equation, it is _.
  4. 11. the solid that can form during a chemical reaction.
  5. 12. when energy is _, the reaction may feel cold.
  6. 13. the small numbers next to elemental symbols in a chemical formula.
Down
  1. 1. the new substances formed in a reaction.
  2. 2. type of reaction when a chemical reaction absorbs heat from the surroundings, feeling colder.
  3. 3. a rapid change in _ can indicate a chemical change.
  4. 5. simple description of what is happening during a chemical reaction.
  5. 7. substances that react to form new substances.
  6. 8. type of reaction when a chemical reaction releases heat to the surroundings, feeling warmer.
  7. 9. indicate a gas has formed as part of the reaction.