Even though it's a week before school ends, 3 K/M is still deep into learning! This week, we have spent a great deal of time on a science unit, "mystery powders" (also called "chemical tests" on the report card). This unit explores many science practices, including forming a hypothesis, testing, observation, gathering data, etc. They are also completing a "lab report"... yep, right here in third grade! Students have had the opportunity to examine the physical and chemical properties of FIVE unknown white powders. They have tested them with various liquids, including water, vinegar, iodine and cabbage juice and observed the changes. Next week, we will put it all together, using some deductive reasoning, and solve the mystery!
Specifically, the standards addressed in this unit are:
- Compares and contrasts the properties of solids and liquids (color, texture, and hardness)
- Demonstrates an understanding that solids and liquids undergo changes in form, color or texture when mixed together, separated or heated
- Uses known properties to identify an unknown chemical
Enjoy some photos from our first exploration...
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