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Soil Types Investigation

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Soil Types Investigation

Harper, Isla and Jai are preparing small pots for the sailing club’s native-plant display. They investigate three adult-provided soil samples: sand, clay and loam. Read the results below, then use the evidence to answer the questions. Never taste soil, and wash your hands after handling it.

The investigation results

The club team put the same amount of each soil into separate clear funnels lined with filter paper. They slowly poured 100 mL of water into each funnel and measured the water that drained through after five minutes. Sand: 80 mL drained through; the soil felt grainy. Clay: 15 mL drained through; the soil felt smooth and sticky when wet. Loam: 45 mL drained through; it felt crumbly and held together when gently squeezed.

1.Which soil let the greatest amount of water drain through in five minutes?
  • Sand
  • Clay
  • Loam
2.Which soil held the most water in the test? Use the results to explain how you know.
3.Match each soil type to the result that best describes it.
  • Sand
  • Clay
  • Loam
  • Smooth and sticky when wet; 15 mL drained through
  • Crumbly and holds together when squeezed; 45 mL drained through
  • Grainy; 80 mL drained through
4.Isla says, “The test was fair because the team used the same amount of water for every soil.” Is Isla right?
5.Complete the sentence: Sand feels because its particles are .
6.Harper wants a soil that drains some water but can also hold together around plant roots. Which sample is the best choice, based on these results? Explain your choice.
7.Jai wants to improve the investigation. Name one thing the team should keep the same for every sample so the results can be compared fairly.
8.The team did not test whether the soils were good for growing plants. What extra test could they do to investigate this?
9.Write one conclusion the sailing club team can make from its water-drainage test. Include a comparison between two soil types.

2 printable pages

  • Soil Types Investigation, page 1 of 2: The investigation results

    Page 1

  • Soil Types Investigation, page 2 of 2: 4. Isla says, “The test was fair because the team used the same amount of water for

    Page 2

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