Science Agenda 1/11/13

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

PLAC

Place waxed paper over this mixing template to complete all of your tests!

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

Make sure to write detailed descriptions!

N/C/C

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

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.