Chain Crosswords Short Science Hard — Set 8

Hard 15×15 Set 8
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10
Across
  1. 3. Force attracting objects to Earth
  2. 7. Biological catalyst for reactions
  3. 9. A word related to science
  4. 10. Naturally occurring inorganic solid
Down
  1. 1. A word related to science
  2. 2. Smallest discrete unit of energy
  3. 4. Substance providing immunity
  4. 5. Mixture producing intense heat
  5. 6. Pure substance on periodic table
  6. 8. Wearing away of land by water or wind