RockLicker · Grade 6 · Lesson 5 of 5

Water Beneath the Surface

Distinguish porosity from permeability using a supplied model comparison.

  • Grade 6
  • 50 minutes
  • Worksheet + teacher guidance
Back to Grade 6

What you will learn

Porosity describes the amount of pore space in a material. Permeability describes how readily water can move through connected spaces. A material can have many pores yet transmit water poorly.

Words to use

  • porosity: proportion of pore space
  • permeability: ease of flow through connected spaces
  • groundwater: water beneath the surface

Evidence for this lesson

Illustrative comparable tests, not aquifer measurements: A—30% pore space; 60 mL passes in 10 min. B—10% pore space; 2 mL passes. C—40% pore space; 15 mL passes. Sample dimensions and test conditions are otherwise comparable.

Use the supplied record as written; do not invent missing results.

Work through the activity

  1. 10 min · Draw spacesDraw one sample with connected openings and another with isolated openings. Explain why total empty space alone does not determine movement.
  2. 15 min · Compare dataRank A, B and C by pore-space percentage, then separately by water volume passing through in ten minutes. Conditions are stated as otherwise comparable.
  3. 15 min · Explain the mismatchIdentify the most porous sample and ask why it is not the fastest transmitter. Use connectivity rather than claiming that pore percentage determines flow.
  4. 10 min · Transfer cautiouslyState what laboratory information is missing for a real aquifer judgment, such as saturation, pressure conditions, fractures and scale.
RockLicker
GRADE 6 · LESSON 5

Water Beneath the Surface

Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.

Responses stay in this open page only. Print before closing or changing pages; no student record is stored online.

Check your understanding

A high pore-space percentage always means high permeability.

Teacher & family guide · answers and assessment

Grade 6 · Water Beneath the Surface

Learning goal: Distinguish porosity from permeability using a supplied model comparison.

Expected responses

  1. C 40%, A 30%, B 10%.
  2. A 60 mL, C 15 mL, B 2 mL under the comparable model conditions.
  3. C has the most pore space but transmits less water than A.
  4. Do not infer a real well yield, drinking-water safety or universal flow rate.

Understanding check: False; connectivity matters. Porosity and permeability describe different properties; connected pathways matter.

Watch for this misconception

Water is usually in pores and fractures, not a single universal underground lake.

Assess the evidence

Look for the observations, calculation or explanation named in the learning goal. Accept accurate drawings and dictated responses. Use the expected responses to discuss reasoning; a correct guess without explanation is a starting point for another conversation.

Adapt and extend

Read prompts aloud, enlarge print or let a partner record the learner’s explanation. Draw a fracture connecting isolated spaces and predict how flow could change.