K-6 Science for the Next Generation

Lesson Plans
Separating Mixtures – Filtration and Evaporation

Learning Objectives

  • Understand the process of filtration and its application in separating mixtures of solids and liquids.
  • Identify the roles of residue and filtrate in the filtration process.
  • Explain the method of evaporation and how it separates soluble solids from liquids in solutions.
  • Discuss real-world applications of filtration and evaporation, such as in the preparation of beverages and salt farming.

Introduction and Hook

Begin the lesson by introducing the concept of separating mixtures using filtration and evaporation. Discuss real-world applications such as making coffee and salt farming.

Go to the Lesson

Direct Instruction

Explain the process of filtration, using examples like separating sand from water. Highlight the roles of residue and filtrate.

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Introduce evaporation as a method to separate soluble solids from liquids, using the example of saltwater.

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Guided Exploration

Engage students in a discussion about the differences between filtration and evaporation. Ask them to provide examples of each process in everyday life.

Hands-On Activity

Conduct a hands-on activity where students perform a simple filtration experiment using sand and water.

Guide students through an evaporation experiment by heating a saltwater solution to observe the formation of salt crystals.

Independent Practice

Assign students to research and present on a real-world application of filtration or evaporation, such as water purification or salt production.

Check for Understanding

Use the 'Separating Mixtures – Filtering' assessment to evaluate students' understanding of the filtration process.

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Assess students' grasp of evaporation through the 'Separating Solutions – Evaporation' worksheet.

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Review and Reflection

Have students reflect on what they learned about separating mixtures. Encourage them to discuss how these processes are used in everyday life.

Assessment and Extension

Conclude the lesson with a quiz to test students' comprehension of filtration and evaporation.

Try the Quiz

For further exploration, provide the 'Review – Matter and Materials' assessment to reinforce key concepts.

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