Earth Science Activity 1C

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Across
  1. 1. a sensible explanation to a scientific problem
  2. 5. soil that contains a range of sand, silt, clay, and humus mixtures
  3. 6. the bacteria that convert nitrates into atmospheric nitrogen
  4. 8. the substance of the physical world
  5. 9. the chart that provides standard names and descriptions of colors
  6. 10. the chemical that stimulates rapid growth of leaves, giving plants a rich, green color
  7. 11. a way of explaining an object or event by using a set of facts
  8. 12. an organized way for scientists to gather and pursue scientific knowledge
  9. 14. the study of soil
  10. 15. the bacteria that convert elemental nitrogen to ammonia, nitrates, and other nitrogen compounds
Down
  1. 2. the chemical that contributes to the general health of plants and improves disease resistance
  2. 3. upward movement of water through a tiny space in response to surface tension
  3. 4. methodically testing hypotheses
  4. 7. a conclusion based on reasoning from evidence
  5. 10. the bacteria that convert ammonia to nitrates
  6. 13. the study of matter and movement of God's physical creation