Science

Edit Answers
1234567891011
Across
  1. 5. This is the chance that a hazard will actually cause harm
  2. 6. An irritant substance causes skin and eyes to be sore or sting.
  3. 7. A flammable substance catches fire easily.
  4. 8. A change in which new substances are made.
  5. 10. A warning to ‘take care’. Some substances need to be used with caution
Down
  1. 1. A substance that is neither an acid nor an alkali. It has a pH of 7.
  2. 2. A numerical scale from 1 to 14 showing how acidic or alkaline a substance is. Acids have a pH below 7, neutral substances have a pH of 7 and alkalis have a pH greater than 7.
  3. 3. A substance that has had water added to it to make it less concentrated
  4. 4. Any substance, soluble or insoluble, that neutralises an acid forming a salt and water only.
  5. 5. The substances that take part in a chemical reaction. These are written on the left side, before the arrow, in a word equation.
  6. 9. A substance that turns litmus red It has a pH of less than 7
  7. 11. An indigestion remedy that contains a base to neutralise the excess acid in the stomach.