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Science Lesson Kit · Teacher Resource

Soil Properties: Which Material Holds Water Best? — 5E Lesson Plan

Earth Science · 45 minutes

Grade 2

5E lesson flow

  1. 01

    Engage

    6 min

    Teacher Does

    Show three dry samples and ask students to observe particle size and texture.

    Students Do

    Describe visible and tactile differences without predicting drainage yet.

    Ask

    • Which sample looks coarse? Which looks fine?

    Look For

    Observable descriptions.

  2. 02

    Explore

    15 min

    Teacher Does

    Guide equal-water drainage tests.

    Students Do

    Pour equal water, wait the same time, and measure collected water.

    Ask

    • What stayed the same?
    • What did we measure?

    Look For

    Consistent test conditions and units.

  3. 03

    Explain

    8 min

    Teacher Does

    Connect collected-water amount with water remaining in each sample.

    Students Do

    Use data to rank samples for drainage in this test.

    Ask

    • If less drained, where is more of the water?

    Look For

    More remained in the sample at measurement time.

  4. 04

    Elaborate

    10 min

    Teacher Does

    Present anonymous data from new samples.

    Students Do

    Interpret the new pattern and discuss why real soils can differ.

    Ask

    • Would every natural soil act exactly like our prepared sample?

    Look For

    Recognition that real soils are mixtures.

  5. 05

    Evaluate

    6 min

    Teacher Does

    Collect the mystery-soil worksheet.

    Students Do

    Use new numbers to support a claim.

    Ask

    • Which measurement is your evidence?

    Look For

    Numerical evidence tied to the claim.

Student goal

I can compare earth materials by observing them and measuring how much water drains through.

Learning objectives

  • I can describe visible differences among prepared soil materials.
  • I can run an equal-water comparison and measure the water that drains through.
  • I can use the result to explain which sample held more water in this test.

Materials

  • Prepared sand-rich, silt-rich, and clay-rich samples
  • Three matching funnels or cups with drainage holes
  • Coffee filters
  • Graduated cups
  • Water
  • Trays
  • Spoons

Before class

  • Use equal dry sample amounts.
  • Pretest the setup so water drains safely within class time.
  • Use the same filter type and container for all samples.
  • Place trays under every setup.

Prior knowledge

  • Earth materials can look and feel different.
  • Measurements can be evidence.

Vocabulary

soil
A mixture of weathered rock pieces, organic matter, air, and water found at Earth's surface.
sand
An earth material with relatively large, gritty particles.
silt
A fine earth material with particles smaller than sand and larger than clay.
clay
A very fine earth material whose tiny particles can pack closely together.
drain
To let water move through and out of a material.

Differentiation

  • Use clear measuring cups with large marks.
  • Provide a data table with sample icons.
  • Offer the frame: Sample __ held more water because only __ mL drained.
  • For extension, compare how packing the same material changes drainage while keeping other variables controlled.

Assessment

  • Check sample observations.
  • Check measurement accuracy.
  • Check fair-test controls.
  • Check that claims are tied to collected-water data.

Exit ticket

Two equal samples each receive 80 mL. X drains 60 mL and Y drains 25 mL. Which held more water during the test, and what is your evidence?

Extension

Test how loose versus gently packed samples of the SAME material affect drainage.