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Science Lesson Kit · Student Worksheet

River Rescue: An Independent Filter Brief

A fictional park team needs to reduce visible sediment for a water-display model. This is NOT drinking water. Use the fresh data below; the interactive lab used different designs.

Grade 5

Name:

Date:

  1. 1.

    A team has three materials: clean gravel, cloth, and a coffee filter. Write one sensible prototype plan and say why you chose the layer arrangement.

  2. 2.

    Design C: clarity 4/5 and 74 mL recovered. Design D: clarity 5/5 and 42 mL recovered. Goal: score >=4 and collect >=60 mL. Which meets both goals?

    Two separate new model filter designs for an independent paper evaluation
    • Design D
    • Both designs
    • Design C
  3. 3.

    A student compares C after 3 minutes with D after 6 minutes. Explain why this is not a fair performance comparison.

  4. 4.

    Draw or describe ONE change to Design D to collect more water while still trapping particles. State what measurement would test the improvement.

    Two separate new model filter designs for an independent paper evaluation

    Draw here

  5. 5.

    Someone writes: 'The filtered water looks clear, so we can drink it.' Write a scientific correction.