The Life Starter
Sign up
Grade 7 · unit review

Review: Watersheds, Groundwater and Design

Trace surface and underground water and evaluate runoff models.

Download reviews and answer keys

Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Which scientific label fits the specifically described step or feature? Supplied case: High ground splits drainage directions.
Need a hint?
  • Look for the described feature: boundary separating drainage areas.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
2. Which scientific label fits the specifically described step or feature? Supplied case: Spaces inside saturated sand contain water.
Need a hint?
  • Look for the described feature: small openings among ground materials.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.
3. Supplied case 5: initial water (L)=120; input water (L)=40; output water (L)=30, using the explicitly named quantities. Final store equals initial liters plus input liters minus output liters. What result follows?
Need a hint?
  • Final store equals initial liters plus input liters minus output liters.
  • The closed accounting model omits unknown flows.
4. Which scientific label fits the specifically described step or feature? Supplied case: Water enters a permeable strip.
Need a hint?
  • Look for the described feature: allows water into permeable ground model.
  • Compare the given mechanism with the other labels; do not infer unmentioned events.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Create a four-panel explanation for “Watersheds, Groundwater and Design” using one supplied case from each lesson. Include the observation, scientific mechanism or calculation, result and a limitation. You may draw and speak your explanation; all inputs are supplied.

Work on paper or in your own document. Explain the choices you made.

  • Use one supplied case from each of the four lessons.
  • Name the relevant structure, quantity or process in every panel.
  • Show calculations with units or a causal evidence chain.
  • Distinguish source facts from fictional classroom data.
  • State a model limit or a condition that would change the result.
Compare with a model response

Panel 1: Three model slopes drain toward one river outlet. What happens to upstream runoff? Which inference or prediction is best supported? Result: It can contribute to downstream flow at that shared outlet.. Reasoning: A watershed is connected by drainage paths; flow connection does not establish quality. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 2: Water occupies connected pore spaces between grains in a model. What pathway is possible? Which inference or prediction is best supported? Result: It can move through connected openings under suitable gradients.. Reasoning: Groundwater storage and flow depend on spaces and connections, not necessarily large caverns. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 3: Supplied case 1: initial water (L)=100; input water (L)=20; output water (L)=30, using the explicitly named quantities. Final store equals initial liters plus input liters minus output liters. What result follows? Result: 90 L. Reasoning: Substitute the supplied values: (100)+(20)-(30) = 90 L. Include both incoming and outgoing water. A decrease is not evidence that recharge is zero. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified. Panel 4: A porous surface lets some supplied rain enter its ground store. What can this reduce? Which inference or prediction is best supported? Result: Surface runoff for that event can decline by the infiltrated amount.. Reasoning: Infiltration redirects water, but capacity and quality require separate evidence. Model limitation: only the stated classroom boundary and supplied observations are established; unmeasured real-world performance remains unverified.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.