Lesson Overview
Students will conduct investigations with milk, food coloring, and soap to observe how mixing substances can cause changes, and then analyze whether these changes result in new substances. Through repeated experimentation and careful observation, they will apply their understanding of physical and chemical changes.
Essential Question
How can we investigate if mixing different substances together creates something truly new, or just a different kind of mix?
Grade(s):
Subject(s):
Recommended Technology:
Other Instructional Materials or Notes:
5
Materials
- Shallow plastic plate or pie pan (at least 2 per group for comparative testing)
- Whole milk (enough for multiple trials)
- 2% or skim milk (for differentiation/comparison)
- Food coloring (various colors)
- Liquid dish soap (small cup/bottle per group)
- Cotton swabs (multiple per group)
- Measuring cups (1/4 cup, 1/2 cup)
- Stopwatch or timer
- Science notebooks/recording sheets
- Pencils/colored pencils
- Access to safety goggles (optional for this specific experiment due to low hazard, but good practice for any science lab)
- Optional: Whiteboards or large paper for design planning
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