Activity 2

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Across
  1. 4. main element in organic compounds
  2. 6. A test that is used to rule out a hypothesis or validate something already known.
  3. 8. study of energy
  4. 11. Latin for knowledge
  5. 12. A solution with a pH higher than 7.
  6. 15. small amount of energy
  7. 17. stores energy and forms cell membranes
  8. 19. is a substance that consists of two or more elements
  9. 21. is the smallest particle of an element
  10. 22. the protective blanket of gases
  11. 24. suggested explanation based on evidence that can be tested by observation or experimentation.
  12. 27. a pure substance
  13. 28. Where life operates.
  14. 29. rate at which energy is used
  15. 30. unit of power
Down
  1. 1. Developing new knowledge based upon old knowledge.
  2. 2. anything that takes up space and has mass.
  3. 3. done when force is applied to an object over a distance
  4. 5. concentration of hydronium ions in a solution
  5. 7. is equal to 746 watts (Another measurement of power)
  6. 9. A solution with a pH lower than 7
  7. 10. sum of all the biochemical reactions in an organism
  8. 13. The study of the interactions between life and its physical environment.
  9. 14. comprises all types of water resources
  10. 16. a substance that starts a chemical reaction
  11. 18. The vast majority of our people directly dependent on the natural resources of their country for their basic needs
  12. 20. the outer mantle of the solid earth.
  13. 23. named after James Prescott Joule
  14. 25. A widely accepted hypothesis that stands the test of time.
  15. 26. a substance that forms because of a chemical reaction
  16. 27. the ability to do work