ACTIVITY 2

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Across
  1. 2. - seen as a villain of science
  2. 4. - main driving factor of the oxygen cycle
  3. 5. - tested to show if it is correct or find where it is wrong
  4. 8. - a substance with constant composition
  5. 9. - fall between metals and non-metals
  6. 12. - study of animal life
  7. 14. - when a theory becomes a fact and can be satisfactorily explained
  8. 16. - an essential nutrient for plants and animals in the form of ions
  9. 18. - process that converts nitrogen to nitrogen gas
  10. 20. - are aldehydes or ketones that function as a source of energy
  11. 23. - anything that occupies space and has mass
  12. 24. - substances that contain 2 or more elements
  13. 27. - study of the atmosphere, weather, and climate
  14. 28. - ionic compound of cations and anions
  15. 29. - science that deals with natural objects
  16. 31. - include environmental geology and evolution of Earth's crust
  17. 33. - one of the most natural hazard-prone countries in the world
  18. 34. - are essential in building of tissues
  19. 37. - rise in temperature that the Earth experiences
  20. 39. - the person who popularized the carbon cycle
  21. 40. - it is the testing of hypothesis
Down
  1. 1. - substances that are soluble in nonpolar solvents and insoluble in polar solvents
  2. 3. - another term for biogeochemical cycles
  3. 6. - tenth most abundant element in the universe
  4. 7. - deals with abstractions rather than observables
  5. 10. - concerned with production, distribution, and consumption
  6. 11. - study of life
  7. 13. - study of interactions between life
  8. 15. - deals with all the celestial objects in the universe
  9. 17. - body of knowledge
  10. 19. - can conduct electricity and heat
  11. 21. - smallest unit of matter
  12. 22. - focused on plant life
  13. 25. - the most abundant element in Earth's atmosphere
  14. 26. - has a bitter taste and can change red litmus paper to blue
  15. 30. - has a sour taste and can change blue litmus paper to red
  16. 32. - aldehydes and ketones with multiple hydroxide group
  17. 35. - can be converted, but not created or destroyed
  18. 36. - tasteless, colorless, and odorless liquid
  19. 38. - any form of precipitation with acidic components