What this lesson teaches
This activity helps students distinguish between pure substances and mixtures. By mixing various household items, they learn the properties of matter and how they interact.
Science in Action
Can you finish mystery mixtures challenge in about 30 min?
Mystery Mixtures Challenge
You will distinguish between pure substances and mixtures.
Duration30 min
Age GroupAges 14–15
DifficultyIntermediate
SubjectScience
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What you need
How the activity runs
The learning connection
Engaging in hands-on experimentation allows students to see firsthand the differences in mixtures versus pure substances. Using Bruner's CPA approach, this interactive experience aids their cognitive development by allowing them to manipulate materials and observe outcomes.
Try it with your learner
1. Gather salt, sugar, sand, and water. 2. In a clear glass, mix 1 tablespoon of salt with 1 cup of water. Stir it. 3. In another glass, mix 1 tablespoon of sugar with 1 cup of water. Stir it. 4. Take 1 tablespoon of sand and mix it with 1 cup of water in a third glass. Stir it. 5. Observe what happens in each glass and note the differences. 6. Discuss with Amma or Appa whether each mixture is a solution or not.