Compare filtration tradeoffs
Compare filtration tradeoffs using supplied evidence and a solved model.
About 18 minutes, plus any extended practice
Supplied materials
- All measurements and observations below are supplied classroom examples. They are not data from actual learners or a claim about a particular real site.
- Paper, drawing space or a browser document.
- Reference card A: amount of target particles caught. Reference card B: volume passing per stated time.
- Assessment case 1: Which scientific label fits the specifically described step or feature? Supplied case: Record reports particles captured.
- Assessment case 2: Which scientific label fits the specifically described step or feature? Supplied case: Record reports liters per minute.
- Assessment case 3: Which scientific label fits the specifically described step or feature? Supplied case: Record reports sheets required.
- Assessment case 4: Which scientific label fits the specifically described step or feature? Supplied case: No dissolved-contaminant test supplied.
- Assessment case 5: Which scientific label fits the specifically described step or feature? Supplied case: Model catches a larger particle fraction.
- Assessment case 6: Which scientific label fits the specifically described step or feature? Supplied case: Model passes liquid more slowly.
Learn the idea
More particle retention may reduce flow or use more material. A design comparison should include all required criteria and matched inputs. No classroom model certifies water treatment.
Retention means amount of target particles caught. Flow rate means volume passing per stated time. Material cost means amount of filter material used. Scope limit means untested contaminants remain unresolved.
For retention, look for the clue “amount of target particles caught.” For flow rate, look for “volume passing per stated time.” More than one process can happen in a real situation. Answer about the one described in this question.
- Read or listen to the four science words and what each means. Say how the first two differ.
- Choose two of the short cases. Point to the clue that helps you choose a science word for each one. You may draw or say your answer.
- Answer each practice question. Say which clue helped you, then check the explanation.
- Use the extra task to make two examples that show different science words. Draw or say what makes each one fit.
See the method in action
Worked reference-card problem: a card states “amount of target particles caught”; a second states “volume passing per stated time.” The first fits retention and the second fits flow rate. The reason is the described function or change, not the order of the cards or a favorite name. If their descriptions exchange places, their category labels exchange too. Keep the supplied descriptions attached to the correct case.
Check your reasoning
Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.
Helpful tips
- Use the feature “amount of target particles caught” to justify retention; do not sort by the name alone.
- Distinguish flow rate (volume passing per stated time) from a different process occurring in the same situation.
See the answer and explanation
retention
The answer is retention. In the notes, it means “amount of target particles caught.” More particle retention may reduce flow or use more material. A design comparison should include all required criteria and matched inputs. No classroom model certifies water treatment.
Take it further
Create one new case showing retention and one showing flow rate. Expected: the first explicitly shows “amount of target particles caught”; the second explicitly shows “volume passing per stated time.” Explain the distinction by drawing, speaking or writing. A label without a matching feature is incomplete.
Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.
More practice: try new cases
Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.
Your choices are temporary. Feedback appears after you check all the answers.
Nothing here is saved to an account or sent to a teacher. Keep your own notes or download them before leaving. The score describes these questions; it does not certify subject mastery.
Check the subject sources
These LifeStarter passages, scenarios and exercises are authored for this Academy with AI assistance and review. External resources keep their publishers’ terms. A grade label suggests a starting level; it does not establish alignment with your school’s complete requirements.