Why is the same resource not found everywhere?
Submit: An evidence record, explanation and revision.
This is a teacher-led extension beyond the short lesson. The task supplies a performance opportunity; completion alone does not certify mastery, full NGSS coverage or state alignment.
Teacher review guideBuild the idea
Resource deposits reflect geological histories. Sedimentary environments can preserve organic matter that becomes fuels under suitable burial conditions. Groundwater occupies connected pore spaces and fractures; rock properties and recharge affect availability. Mineral concentration can result from processes such as cooling magma or circulating hot fluids. These processes operate over different timescales.
Science / engineering practice
Constructing explanationsCore idea
Geological processes produce uneven resource distributionsCrosscutting concept
Cause and effectEvidence and model inputs
Original comparison cards: region A has porous sandstone above a less permeable layer and recharge; B has similar rock but little recharge; C has a mapped mineral vein associated with ancient fluid pathways. These hypothetical regions illustrate mechanisms. Use USGS readings to support process explanations rather than treating these cards as a real resource map.
Keep actual observations, published findings and invented model cases labeled separately. If a source or required equipment is unavailable, pause that part with a teacher; do not invent results.
Materials and preparation
Paper, graph paper or spreadsheet, and the linked readings.
Grade-level scope
Emphasize past and current geoscience processes and timescales, not detailed extraction engineering.
Do the work
- Read the USGS groundwater and mineral-resource descriptions and distinguish source facts from hypothetical cards.
- Draw a cross-section for A and B showing pores, recharge and the barrier.
- Explain how C’s earlier fluid activity could concentrate material locally.
- Compare formation or replenishment times with human extraction rates.
- Write an evidence-based explanation of uneven distribution and identify a survey needed before making a real extraction decision.
Learner worksheet
Write on paper or type here and print. Entries stay in this page’s memory and are lost when you leave or reload; they are not saved or submitted.
Check your reasoning
- Is groundwater usually an underground open lake?
- Does porous rock guarantee abundant sustainable water?
- Why might a vein be localized?
- Does “natural” mean rapidly renewable?
Teacher review guide
Review the actual deliverable and discuss the reasoning. For each criterion, use 0 when evidence is absent or fundamentally incorrect, 1 when partly supported with a material error or omission, and 2 when accurate, supported and complete for the stated task. Maximum 8 points is a task score, not a proficiency certification. Give feedback and allow revision.
- Links uneven distribution to past geological processes.
- Uses two resource examples and source information.
- Separates storage from replenishment.
- Qualifies hypothetical maps and needed evidence.
Answer guidance for the reasoning checks
Is groundwater usually an underground open lake?
No. Much occupies pores and fractures.
Does porous rock guarantee abundant sustainable water?
No. Recharge, connectivity and withdrawals matter.
Why might a vein be localized?
Past fluid pathways concentrated material along particular structures.
Does “natural” mean rapidly renewable?
No. Compare process timescales with use.
Access, support and extension
Offer read-aloud support, labeled diagrams, larger print or an oral/recorded explanation while preserving the scientific reasoning. A partner or teacher can handle physical manipulation while the learner plans, records and interprets. Use a teacher-provided measured dataset only when its provenance and limitations are explicit; it does not replace conducting an investigation when that is the assessed practice. For greater independence, remove prompts and ask learners to compare a second explanation or test another justified revision.
Sources and standard reference
- Official NGSS MS-ESS3-1 performance expectation — inspect the practice, core idea, crosscutting concept and assessment boundary.
- USGS groundwater
- USGS mineral resources
Instructional text and hypothetical cases are original. Linked source readings supply published evidence where specified. Teachers should judge fit with their course and state requirements.