science & Technology

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Across
  1. 2. the only metal which is liquid at room temperature
  2. 5. salt content naturally occurring in water
  3. 6. an indivisible and basic unit of matter
  4. 8. the mechanical process to separate solids from the fluids.
  5. 9. Breakdown of rock by physical and chemical change
Down
  1. 1. day 22nd April
  2. 3. an animal with backbone
  3. 4. dioxide used by plant/algae for photosynthesis
  4. 7. result of contamination.
  5. 8. The process through which a substance changes from liquid to solid