About the Activity
This Mystery Powders lab activity is designed to let students explore the chemical and physical properties of everyday materials
using basic chemistry techniques.
To perform the activity, students make observations of the physical properties of 4 known powders
. Specifically, the 4 known powders are white flour, baking soda, powdered sugar, and baby powder. After observing physical properties, students then observe the chemical properties
of the powders by performing 4 chemical tests: reaction with water, reaction with acid, reaction with iodine, and low heating. Students record their observations oin a data table throughout the activity.
Students then perform the same 4 tests on the 3 mystery mixtures
. The 3 mystery mixtures are combinations of the powders mentioned previously in set ratios as described in the Teacher Notes
section of the lab document. Students are then challenged to predict which of the 3 mystery mixtures best matches the ingredients in a particular cookie recipe by comparing the physical and chemical properties of each mystery mixture with the properties of the 4 known powders. Students then make their choice and justify their decision using experimental data
Introduction to the Activity (From the Lab Document)
"Each winter, Mrs. Merry makes a batch of her sugar cookies to give to all the good boys and girls in her neighborhood. However, a bad little boy named Norris McNaughty snuck into her kitchen and mixed up all of her special baking powders! Norris left 3 large piles, each containing a different mixture of her powders.
The Scientific Bureau of Investigation (SBI) has provided you with samples of 4 individual powders found in Mrs. Merry's kitchen and the 3 mixed up piles left by Norris. Help her find the right mixture needed in her famous sugar cookie recipe."
introduces the activity and describes the procedure.
features a full-page data table and analysis/conclusion section.
is a full color-coded answer key
with sample data.
is a detailed Teacher's Guide
to setting up conducting the lab.
includes labels for each powder/mixture for your lab beakers
Downloadable in 2 Formats:
This worksheet comes in 2 formats: a static PDF document
and fully-editable WORD document
Download the full PDF preview
to see EXACTLY what you are getting!
Relevant NGSS Core Idea(s) Addressed by This Product:
NGSS - MS-PS1.A
Physical Science - Matter and its Interactions - Structure and Properties of Matter
NGSS - MS-PS1.B
Physical Science - Matter and its Interactions - Chemical Reactions
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. All rights reserved by author. This product is to be used by the original downloader only. Copying for more than one teacher, classroom, department, school, or school system is prohibited. This product may not be distributed or displayed digitally for public view. Failure to comply is a copyright infringement and a violation of the Digital Millennium Copyright Act (DMCA). Clipart and elements found in this document are copyrighted and cannot be extracted and used outside of this file without permission or license. Intended for classroom and personal use ONLY.