CHEMICAL REACTIONS

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Across
  1. 5. A compound that includes oxygen.
  2. 6. A new chemical formed in a chemical reaction. Eg:Sodium + chloide = Table salt.
  3. 8. the number before a chemical formula that shows how many atoms that are involved in a chemical reaction.
  4. 9. It is a substance formed when iron or steel reacts with oxygen and water.
  5. 10. Makes a reaction occur faster.
Down
  1. 1. When a chemical reaction needs heat energy so that the reaction can occur.
  2. 2. A _______ change is when no new substances are formed during a chemical reaction but there could be a change of shape, size or state of matter (form).
  3. 3. Loss of electrons. For example when you leave an apple or bananna, it turns brown. This is because it reacts with the air/oxygen.
  4. 4. A procces were two ore more substances form a new irriversable substance.
  5. 7. Chemicals that join together to form a new substance.