General Science

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Across
  1. 2. study of living organisms. (7)
  2. 6. of the universe. (8)
  3. 7. with a positive charge. (8)
  4. 8. that measures temperature. (9)
  5. 10. satellite of Earth. (4)
Down
  1. 1. reaction that releases energy. (6)
  2. 2. explaining the origin of the universe. (4,2)
  3. 3. of disorder in a system. (5)
  4. 4. unit of matter. (5)
  5. 5. of attraction between objects. (6)
  6. 8. 2. Smallest unit of a chemical element. (5) 3. Study of the atmosphere. (7) 5. Process plants use to convert sunlight into energy. (13) 6. The force that opposes motion. (6) 8. The building blocks of proteins. (8) 11. Change of state from liquid to gas. (5) 13. Force that keeps planets in orbit. (6) 16. Element essential for life, atomic number 6. (6) 18. Instrument for observing distant objects. (8) 20. Basic unit of heredity. (6)
  7. 9. Clues