Activity 2

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Across
  1. 4. Where life operates.
  2. 5. a substance that starts a chemical reaction
  3. 6. stores energy and forms cell membranes
  4. 7. Developing new knowledge based upon old knowledge.
  5. 11. main element in organic compounds
  6. 13. the protective blanket of gases
  7. 17. Latin for knowledge
  8. 18. is a substance that consists of two or more elements
  9. 20. is the smallest particle of an element
  10. 21. A test that is used to rule out a hypothesis or validate something already known.
  11. 24. the outer mantle of the solid earth.
  12. 25. anything that takes up space and has mass.
  13. 27. The vast majority of our people directly dependent on the natural resources of their country for their basic needs
  14. 28. suggested explanation based on evidence that can be tested by observation or experimentation.
  15. 31. the ability to do work
Down
  1. 1. concentration of hydronium ions in a solution
  2. 2. study of energy
  3. 3. unit of power
  4. 8. sum of all the biochemical reactions in an organism
  5. 9. done when force is applied to an object over a distance
  6. 10. is equal to 746 watts (Another measurement of power)
  7. 12. 70% of human body is made up of this
  8. 14. comprises all types of water resources
  9. 15. named after James Prescott Joule
  10. 16. rate at which energy is used
  11. 19. a substance that forms because of a chemical reaction
  12. 20. A solution with a pH lower than 7
  13. 22. The study of the interactions between life and its physical environment.
  14. 23. A solution with a pH higher than 7.
  15. 26. a pure substance
  16. 29. A widely accepted hypothesis that stands the test of time.
  17. 30. small amount of energy