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WUHSD Final Exam Review 2013 Semester 1

WUHSD Final Exam Review 2013 Semester 1. Ms. Martinez LSHS 01/07/13. Investigation & Experimentation. Investigation and Experimentation. 1. Define Hypothesis:. 1. Define Hypothesis:. a testable possible explanation of an observation. 2. Define Theory:. 2. Define Theory:.

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WUHSD Final Exam Review 2013 Semester 1

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  1. WUHSDFinal Exam Review2013Semester 1 Ms. Martinez LSHS 01/07/13

  2. Investigation & Experimentation Investigation and Experimentation

  3. 1. Define Hypothesis:

  4. 1. Define Hypothesis: a testable possible explanation of an observation.

  5. 2. Define Theory:

  6. 2. Define Theory: an explanation that has been tested and confirmed many times

  7. 2a.What is a controlled experiment?

  8. 2a.What is a controlled experiment? An experiment where all variables are kept the same except one.

  9. 3. Why is a control group important to have in an experiment?

  10. 3. Why is a control group important to have in an experiment? It is a part of the experiment that is not tested and is used to compare results.

  11. 3a. Define Independent Variable

  12. 3a. Define Independent Variable The variable, on the x axis, that the scientist is in control of. Ex. time, temperature DRY MIX!!

  13. 3b. Define Dependent Variable

  14. 3b. Define Dependent Variable The variable, on the Y axis, that is the RESULT. Ex. # bubbles produced DRY MIX!!

  15. 3c. Explain 3 possible sources of errors in an experiment.

  16. 3c. Explain 3 possible sources of errors in an experiment. -person didn’t time correctly -equipment doesn’t work correctly -person didn’t add enough chemicals -person used too many chemicals -person didn’t use a control

  17. 4. What are the steps of the scientific method?

  18. 4. What are the steps of the scientific method? Ask a question Form a hypothesis Experiment Observations Data Collection Conclusions Retest, if necessary

  19. Macromolecules

  20. 5. Define monomer:

  21. 5. Define monomer: Small, simple molecules

  22. 6. Define polymer:

  23. 6. Define polymer: Large, complex molecules made from simple monomers

  24. Polymer Monomer Common Example Carbohydrates (Polysaccharides) Amino Acids Lipids Nucleotides 7. Fill in the chart below.

  25. Polymer Monomer Common Example Monosaccharide Protein Amino Acids Glycerol and Fatty acids Nucleic Acids Nucleotides 7. Fill in the chart below. Carbohydrates (Polysaccharides) Glucose, C6H12O6 Muscle, Enzymes Lipids Oils, waxes DNA and RNA

  26. 7a. What does Benedict’s Solution test for? How does it work?

  27. 7a. What does Benedict’s Solution test for? How does it work? In the presence of a MONOSACCHARIDE and HEAT, it changes from BLUE to Red/Orange

  28. 7b. What does Lugol’s Iodine Solution test for? How does it work?

  29. 7b. What does Lugol’s Iodine Solution test for? How does it work? In the presence of a STARCH/POLYSACCHARIDE, it changes from BROWN to BLUISH/BLACK

  30. 8. What is the function of an enzyme?

  31. 8. What is the function of an enzyme? No Enzyme Enzyme -Is a biological catalyst that speeds up chemical reactions by lowering the activation energy of a reaction. **most end in –ASE

  32. 9. What factors can reduce the effectiveness of enzyme function?

  33. 9. What factors can reduce the effectiveness of enzyme function? A change in pH, temperature, or salts.

  34. 10. Describe the process in the figure below.

  35. 10. Describe the process in the figure below. substrate binds to the active site the reaction occurs the products are released

  36. 11. Does the enzyme change during this process?

  37. 11. Does the enzyme change during this process? No

  38. 12. What happens to the enzyme following this process?

  39. 12. What happens to the enzyme following this process? It gets recycled

  40. 12a. What does denature mean?

  41. 12a. What does denature mean? When the proteins’ natural structure, its 3-D shape, is permanently changed

  42. 12b. What is the difference between a catalyst and a Biological catalyst?

  43. 12b. What is the difference between a catalyst and a Biological catalyst? Catalysts speed up reactions in non-living things. Biological catalysts (enzymes) speed up reactions in living things.

  44. Cell Structure and Function

  45. Page 1 Completed. • STOP!! • DO NOT WORK AHEAD. • We will review daily!

  46. 13. What is the difference between prokaryotic and eukaryotic cells?

  47. 13. What is the difference between prokaryotic and eukaryotic cells?

  48. 14. Give an example of a prokaryotic cell:

  49. 14. Give an example of a prokaryotic cell: Bacterium

  50. 15. Give at least two examples of eukaryotic cells:

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