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Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
Mixtures 1-3 Separating a Dry Mixture
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Mixtures 1-3 Separating a Dry Mixture

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  • 1. Taking Mixtures Apart pg 11 • How would you separate a mixture of marbles, corks, and nails? • Would a screen be useful for separating a mixture of gravel and diatomaceous-earth powder? Explain. • Would filter paper be useful for separating a sugar and water solution? Explain. • Why does salt separated from a saltwater solution look different than the salt that dissolved in the water?
  • 2. Response Sheet – Separating Mixtures • Martin wrote in his science notebook: – Water and salt make a solution. I know that because when you mix them, you can’t see the salt anymore. It can’t be a mixture because mixtures are always made of two or more solids. • Is Martin confused? Rewrite his paragraph as you think it should be written.
  • 3. Focus Question: How do you separate a dry mixture? Investigation 1-3
  • 4. Challenge • Your challenge is to design a method to separate this mixture of three solid materials so that the gravel ends up in a G cup, the powder in a P cup, and the salt in an S cup. • Read Separating a Dry Mixture sheets in your groups.
  • 5. Make the Dry Mixture • Label one cup “Dry Mixture – Group #” • Add one 5-ml spoon each of: – Gravel – Powder – Salt • Stir the dry mixture • Plan how you will separate the mixture • Write a detailed plan in your Science Notebook - include materials needed and step-by-step process.
  • 6. Restate Challenge • Have you designed your method? • Have you separated the gravel? • Have you separated the powder? • Have you separated the salt?
  • 7. Revising Separation Method • What worked? What didn’t? • How could you improve the process to be more complete or efficient? • Rewrite the separation method based on what you now know. Write a complete, detailed plan that another group could follow to separate the three solid materials. • Clean up. Save gravel. Rinse cups. Throw papers away. Return all materials to storage area.
  • 8. Homework • I-check 1 quiz on Thursday, 9/18 • Quiz will cover all the mixtures investigations and reading from pages 3-14.
  • 9. Summary: Separating Mixtures pg 14 • What is the difference between a liquid, a solution, and water? • What is a mixture? • What is a solution? • Is salt water a mixture or a solution? Explain. • Describe three ways to separate a mixture.
  • 10. Summary: Separating Mixtures pg 14 • What is the difference between a liquid, a solution, and water? • What is a mixture? • What is a solution? • Is salt water a mixture or a solution? Explain. • Describe three ways to separate a mixture.

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