Matter

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Across
  1. 5. Take up space and mass
  2. 6. A pure substance made up of just one type of atom
  3. 7. We need it for respiration
Down
  1. 1. Mixture of two more more pure substance
  2. 2. Iron becomes brown after a long time in air
  3. 3. A pure substance made up of 2 or more types of atoms
  4. 4. We need it when thirsty