Science 9 -Unit C- Environmental Chemistry - Final Exam Review

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Science 9 -Unit C- Environmental Chemistry - Final Exam Review
2013-05-17 01:15:45

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  1. Understand the Nitrogen cycle. How is Nitrogen breakdown into compounds so that it is useful to us?
  2. Sulfur can be produced from what?
    "Sour Gas"
  3. What is Sour Gas?
    Hydrogen Sulfide
  4. Are Nitrogen compounds converted into lipids, protiens, or carbohoydrates?
  5. What is the purpose of the nodules on the roots of alfalfa plants?
    Bacteria fixes to the nitrogen in the soil.
  6. How is nitrogen formed ?
    Nitrogen fixing bacteria
  7. What do we call the process of nitrogen being formed?
    Nitrogen fixation
  8. What occurs to insects if pesticides or insecticides are used for many years?
    The insects will build up an immune system to it
  9. Understand the four numbers on the outside of a fertilizer bag.
    Numbers mean amount of Nitrogen, Phosphorus, Potassium, and Sulfur. Sulfurs only there sometimes. N-P-K-S.
  10. Understand the composition of of air (%'s of each type of gas).
    Carbon dioxide:
    • Nitrogen: 78%
    • Oxygen: 21%
    • Argon: Less than 1%
    • Hydrogen: Traces
    • Carbon dioxide: 0.03%
  11. Is lemon juice an acid or a base?
  12. Is baking soda an acid or a base?
  13. Is apple juice an acid or a base?
  14. Is orange juice an acid or a base?
  15. Is tomato juice an acid or a base?
  16. Is tums an acid or a base?
  17. Is alkasltzer an acid or a base?
  18. How many more times acid is something with a pH pf two than something with a pH of 4?
    100 times
  19. What color does litmus paper turn in a base?
  20. What color does litmus paper turn in an acid?
  21. What would you do to a pool or lake to make it more acidic?
    Add carbonic acid
  22. What would you do to a pool or lake to make it more basic?
    Add sodium bicarbonate or calcium hydroxide
  23. What is limewater ?
    Calcium hydroxide
  24. What is limewater used for?
    To make lakes more basic and test for Carbon Dioxide.
  25. What is usually the active ingredient in an antacid that you would buy from the store?
    Baking soda
  26. In a neutralization, what two things are always produced?
    Some type of salt and water
  27. What types of indicators are considered to be the best and why?
    Universal indicators because they show a bunch of different colors to specify the base or acid
  28. All organic compounds contain what element?
  29. Apporx. how many essential elements are required for a healthy living?
  30. Is a microgram larger or smaller than a milligram?
  31. Is a microgram larger or smaller than a kilogram?
  32. What is the difference between diffusion and osmosis?
    Osmosis deals with water
  33. What is hydrolysis?
    Breaking down something with water
  34. How does oxygen get dissolved in water?
    Through churning water.
  35. How is oxygen taken out of water?
    Living organisms take it.
  36. What is acid shock and when does it occur?
    Its when concentration of acid can lower the pH in a lake/river. Happen during the spring
  37. What is a scrubber?
    It takes a harmful pollutant and makes them less harmful.
  38. At what level shoudl we deal with pollutants?
  39. What is the difference between the greenhouse effect and the enhanced greenhouse effect?
    The greenhouse effect is natural while the enhance greenhouse effect is human made.
  40. How do scientists global warming in reference of the ice fields?
    They cut deep into the ice fields and they pull out meter long blocks of ice to study the carbon levels.
  41. What are some of the ways to combat the increasing levels of CO2 in the world?
    Drive electric cars/cut down on forestation
  42. Why is the ozone layer important?
    Protects us from Uv rays
  43. How can ground level ozone be bad for us?
    Can cause lung damage
  44. What is a leachate?
    Substance that moves through the soil
  45. Four greenhouse gases?
    Water vapor, Carbon dioxide, methane, and nitrogen oxide
  46. Dispersion
    Becomes more dilute
  47. Diffusion
    Goes from high concentration to area with low concentration
  48. What conditions would be ideal to transport pollution the farthest?
    Warm, windy, dry
  49. What are protozoans and how do they enter the water system?
    Harmful bacteria that can suck oxygen out of water. Come from sewage.
  50. How should harmful chemicals be disposed of?
    Hazardous waste collection site
  51. What do we call water sources where we get our drinking water from?
    Potable sources
  52. How does organic material slow the material slow the movement of chemical pollutants?
    reacts with them
  53. What information does a Material Safety Data Sheet give you?
    • Tells you how to store chemicals
    • how .
    • How to handle chemicals
    • How to clean chemicals
    • What to wear with chemicals