Csi day 2

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Csi day 2

  1. 1. You will Need: 1. Pencil, One Colored Pencil 2. Forensics Intro – Was due yesterday – If you were absent please write ABSENT at the top or FIELD TRIP 3. CSI Lab – to be passed out
  2. 2. 1.Final Exam CHANGE – 1 day only - FRIDAY – ½ page of notes, front side only, done by hand – Target Concepts on-line (Fri- June 6th only) 2.Binder Check #4 – Due Friday June 6th
  3. 3. 1. Long Hair MUST be tied back 2. Loose sleeves, bracelets must be pushed up or removed. 3. Appropriate Lab Behavior 4. Consequence = Book Work- See Side Board
  4. 4. -10 points will be taken for unclean labs 1. Sinks clean 2. Counters & Table Tops Clean & Dry 3. DO NOT sweep powders onto floors 4. DRY the inside of the Supply Bag (Testing Equipment) 5.Powder Bags stacked straight up inside Large Zip Lock Bag Let Me KnowLet Me Know if supplies need to beif supplies need to be added/changedadded/changed
  5. 5. 1. You may choose your partner for this lab – CHOOSE WISELY 2. Please move to sit NEXT TO your partner – No more than 4 people to a table 3.Decide who is Partner A and Partner B 4. Partner B – Pick up One Set of 2 sheets from front bookshelf 5. Put Both names on ALL papers
  6. 6. How does the CSI team SOLVE CASES?
  7. 7. Characteristic Partner #1 Partner #2 1. Eye Color 2. 3. 4. 5. TOM JERRY Physical Characteristics/Attributes – NO OPINIONS!
  8. 8. Problem: Can we identify a mixture of 2 different powders based on their Physical & Chemical properties? Hypothesis: IF we test five different powders using our senses, solubility, iodine, vinegar and heat test THEN we should be able to identify a mixture of any 2 powders.
  9. 9. StickyBlackSilkySmoothRoughHardCrunchyRubberyMilkySoftGrayYellowBrightCrystalline WhiteDarkBlackSilkySmoothRoughRoughOpaqueB right BlackSilkySmoothRoughHardCrunchyRubberyMilkySoftGrayYellowBrightCrystalline WhiteDarkBlackSilky moothugh d hy Flour Magnifier Testing Trays (2) Stir Sticks (4) Iodine Vinegar Solubility Tray- leave out of big bag
  10. 10. Problem: Scientific Results must be kept free of contamination…..so….. 1. Do Not DOUBLE DIP!!!!! 2. Clean your hands each time you use a new powder!!!!! 3. Stir sticks should be trimmed when contaminated.
  11. 11. Test Powder #1 Sugar Powder #2 Flour Powder #3 Baking Soda Powder #4 Corn Starch Powder #5 Salt Senses Sound, Sight, Touch Smell (waft) Solubility The ability to dissolve, (blend) in water 3 unique bullets for each square – one simile Get Mrs. M.’s Signature after finishing 2 complete tests
  12. 12. TESTS : Please complete each test on every powder before moving on to the next test. 1.Senses: A. Use your senses of sight, touch and smell. (mag. glass, wafting technique) B. Record your observations into the chart. Use a variety of adjectives to help establish the unique qualities of each powder. C. Three characteristics are required 2. Solubility: A. Fill each of your vials with about 2.5 cm of water. (from the sink….be careful with the pressure- TURN ON the SINK 1st) B. Add in a “pinch” of powder. C. Make one observation as the powder is “falling” into the vial. Record . D. Stir in the powder with the stir stick. E. Make a second observation once the powder has been stirred in. Record. *Since each tray has only 4 vials, you will need to clean the tray out to test your fifth powder. BRING DATA TABLE UP FOR TEACHER INITIALS.
  13. 13. Test Powder #1 Sugar Powder #2 Flour Powder #3 Baking Soda Powder #4 Corn Starch Powder #5 Salt Iodine Pinch +3 DROPS Vinegar Pinch + 3 DROPS 3 unique bullets for each square – 1 simile Get Mrs. M.’s Signature after finishing 2 complete tests
  14. 14. 3. Iodine: Changes color in the presence of starch. (golden yellow-brown to black) •Use the FLAT testing trays for this test. •Measure a “pinch” of powder into each well. •With the dropper, dispense three drops of iodine onto each powder. •Make one observation as the iodine is placed onto the powder. Record. •Stir in the iodine with the stir stick. •Make a second observation once the iodine is stirred in. Record. •Cut the tip of the contaminated stir stick off before using the stick again. WASH, CLEAN and DRY TESTING TRAY 4. Vinegar: Chemical reaction between acids & bases results in bubbling and exothermic reaction. •Use the FLAT testing trays for this test. •Measure a “pinch” of powder into each well. •With the dropper, dispense three drops of vinegar onto each powder. •Make one observation as the vinegar is placed onto the powder. Record. •Stir in the vinegar with the stir stick. Cut the tip of the contaminated stir stick off before using again. •Make a second observation once the vinegar is stirred in. Record. WASH, CLEAN and DRY TESTING TRAY BRING DATA TABLE UP FOR TEACHER INITIALS.
  15. 15. StickyBlackSilkySmoothRoughHardCrunchyRubberyMilkySoftGrayYellowBrightCrystalline WhiteDarkBlackSilkySmoothRoughRoughOpaqueB right BlackSilkySmoothRoughHardCrunchyRubberyMilkySoftGrayYellowBrightCrystalline WhiteDarkBlackSilky moothugh d hy Flour Magnifier Testing Trays (2) Stir Sticks (4) Iodine Vinegar Solubility Tray- leave out of big bag
  16. 16. -10 points will be taken for unclean labs 1. Sinks clean 2. Counters & Table Tops Clean & Dry 3. DO NOT sweep powders onto floors 4. DRY the inside of the Supply Bag (Testing Equipment) 5.Powder Bags stacked straight up inside Large Zip Lock Bag Let Me KnowLet Me Know if supplies need to beif supplies need to be added/changedadded/changed

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