science agenda 1/11/13
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Science Agenda 1/11/13. >Pick up the Lab Report from the table >Write your name at the top of the Lab report and clear your desk >Do Not touch any of the lab supplies or materials >Listen for further instructions. Place waxed paper over this mixing template to complete all of your tests!. - PowerPoint PPT PresentationTRANSCRIPT
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SCIENCE AGENDA 1/11/13>Pick up the Lab Report from the table
>Write your name at the top of the Lab report and clear your desk
>Do Not touch any of the lab supplies or materials
>Listen for further instructions
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PLAC
Place waxed paper over this mixing template to complete all of your tests!
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LAB SUPPLIES AT THE TABLE Day #1 >6 samples of powders #’s (1-6) with straw >cup of toothpicks (for mixing) >waxed paper and mixing template sheets >3 cups of liquids (I=Iodine, W=water, and
V=vinegar (2 pipette eyedroppers in each) Glass Petri Dishes on 6 hot plates Day #2>Mystery samples A,B,and C with straw>Glass Petri Dishes on 3 hot plates>all of the original suplies
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Make sure to write detailed descriptions!
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N/C/C
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THE MYSTERY POWDER RESULTS Mystery Sample A: Flour, corn starch, and
powdered sugar
Mystery Sample B: Flour, baking powder, and powdered sugar
Mystery Sample C : Flour, baking soda, and baby powder
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MYSTERY MIXTURES A, B, AND CSample Description Water Test Vinegar
TestIodine Test
Heat Test
A Off white doughy odor
No fizzing, doughy odor, cream color
No fizzing, same as water
Light purple Some brown and black bubbly spots, burnt toast smell
B Pure white, soft, slight doughy odor
Tiny amounts of fizzing
More fizzing Purple and small fizzing action
Black and bubbly, golden to brown color also
C Strong odor, soft feel, grey tint
Cream color
Fizzing with vinegar
Light purple Slight light brown spots, mostly no change
Substance B is closest to Cupid’s recipe because it fizzes in all liquids, it gets black and bubbly when heated, and it has a doughy odor like flour.
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