Science

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Across
  1. 2. The smallest particle of an element
  2. 4. A substance with a pH below 7
  3. 5. An alternative form of a gene
  4. 8. The process plants use to make food using sunlight
  5. 9. A base that dissolves in water and has a pH above 7
  6. 10. The “powerhouse” of the cell where energy is released
  7. 12. The rate at which velocity changes
Down
  1. 1. A reaction that releases heat
  2. 3. A substance that speeds up a reaction without being consumed
  3. 6. A measure of disorder in a system
  4. 7. A material that does not allow electricity to pass easily
  5. 11. A bond formed through electrostatic attraction between oppositely charged ions