Science Task Screener

Task Title: Boyle’s Law: The Squeeze on Gas Particles

Grade: High School

Date: 2024-05-20

Instructions

Criterion A. Tasks are driven by high-quality scenarios that are grounded in phenomena or problems.

i. Making sense of a phenomenon or addressing a problem is necessary to accomplish the task.

What was in the task, where was it, and why is this evidence?

  1. Is a phenomenon and/or problem present?

Students must use the Boyle’s Law simulation to make sense of why a balloon becomes increasingly harder to squeeze as it is compressed, and why it springs back when released.

  1. Is information from the scenario necessary to respond successfully to the task?

Yes, students must extract specific pressure and volume data from the simulation’s gauge and graph to perform the calculations and reasoning needed to construct their multi-scale model of gas behavior.

ii. The task scenario is engaging, relevant, and accessible to a wide range of students.

Features of engaging, relevant, and accessible tasks:

Features of scenarios Yes Somewhat No Rationale
Scenario presents real-world observations [x] [ ] [ ] Grounded in the familiar phenomenon of squeezing a balloon
Scenarios are based around at least one specific instance, not a topic or generally observed occurrence [x] [ ] [ ] Specific instance of compressing a balloon and feeling increasing resistance
Scenarios are presented as puzzling/intriguing [x] [ ] [ ] The puzzling “why does it get harder to squeeze” creates intellectual need
Scenarios create a “need to know” [x] [ ] [ ] Students need to know the connection between particle behavior and macroscopic resistance
Scenarios are explainable using grade-appropriate SEPs, CCCs, DCIs [x] [ ] [ ] Aligns tightly with HS-PS3-2 and Developing and Using Models
Scenarios effectively use at least 2 modalities (e.g., images, diagrams, video, simulations, textual descriptions) [x] [ ] [ ] Text description, interactive particle model simulation, and real-time P-V graph
If data are used, scenarios present real/well-crafted data [x] [ ] [ ] Simulation generates accurate pressure data consistent with Boyle’s Law
The local, global, or universal relevance of the scenario is made clear to students [x] [ ] [ ] Understanding gas pressure is universally relevant to breathing, weather, and engineering
Scenarios are comprehensible to a wide range of students at grade-level [x] [ ] [ ] The balloon-squeezing phenomenon is familiar and accessible to all students
Scenarios use as many words as needed, no more [x] [ ] [ ] The scenario is concise and gets straight to the core physics problem
Scenarios are sufficiently rich to drive the task [x] [ ] [ ] The scenario naturally leads into data collection, analysis, and multi-scale modeling
Evidence of quality for Criterion A: [ ] No [ ] Inadequate [ ] Adequate [x] Extensive

Suggestions for improvement of the task for Criterion A:

The phenomenon is well established. Further enhancement could include asking students to relate this to other real-world scenarios, such as a syringe plunger or deep-sea diving.

Criterion B. Tasks require sense-making using the three dimensions.

i. Completing the task requires students to use reasoning to sense-make about phenomena or problems.

Consider in what ways the task requires students to use reasoning to engage in sense-making and/or problem solving.

Students must mathematically reason using Boyle’s Law ($P_1V_1 = P_2V_2$) and their collected data to identify the inverse relationship between pressure and volume, moving beyond superficial observation to causal reasoning about particle collisions and energy transfer.

ii. The task requires students to demonstrate grade-appropriate dimensions:

Evidence of SEPs (which element[s], and how does the task require students to demonstrate this element in use?)

Students develop and use a model of gas behavior at two scales: a macroscopic model of pressure and volume (using the simulation gauge and P-V graph) and a molecular model of particle motion and collisions (using the particle collision visualization). They connect observed trends to underlying particle behavior (Developing and Using Models).

Evidence of CCCs (which element[s], and how does the task require students to demonstrate this element in use?)

Students trace the flow of energy into the gas system when work is done during compression, accounting for it in terms of increased particle kinetic energy and changes in particle spacing/potential energy (Energy and Matter).

Evidence of DCIs (which element[s], and how does the task require students to demonstrate this element in use?)

Students apply their understanding that energy at the macroscopic scale is a combination of the kinetic energy of particles (their motion) and the potential energy associated with their relative positions. In a gas, pressure arises from particle collisions driven by kinetic energy (DCI: PS3.A).

iii. The task requires students to integrate multiple dimensions in service of sense-making and/or problem-solving.

Consider in what ways the task requires students to use multiple dimensions together.

The prompt in Part 4 explicitly asks students to construct a two-scale model (SEP) that traces energy flow during compression (CCC) to explain why pressure increases as volume decreases based on particle-level kinetic and potential energy (DCI).

iv. The task requires students to make their thinking visible.

Consider in what ways the task explicitly prompts students to make their thinking visible (surfaces current understanding, abilities, gaps, problematic ideas).

Students make their thinking visible by recording raw data in tables, calculating P×V values, writing responses to analysis questions connecting macroscopic and microscopic behavior, and creating a comprehensive two-scale model with claim, evidence, and reasoning.

Evidence of quality for Criterion B: [ ] No [ ] Inadequate [ ] Adequate [x] Extensive

Suggestions for improvement of the task for Criterion B:

The integration is strong. Ensure students explicitly connect the kinetic energy of particles to the pressure reading on the gauge in their model write-ups.

Criterion C. Tasks are fair and equitable.

i. The task provides ways for students to make connections of local, global, or universal relevance.

Consider specific features of the task that enable students to make local, global, or universal connections to the phenomenon/problem and task at hand. Note: This criterion emphasizes ways for students to find meaning in the task; this does not mean “interest.” Consider whether the task is a meaningful, valuable endeavor that has real-world relevance–that some stakeholder group locally, globally, or universally would be invested in.

The concept of compressing a gas (balloon, syringe, bicycle pump) is universally understandable and directly applicable to understanding breathing mechanics, weather systems, and pneumatic devices.

ii. The task includes multiple modes for students to respond to the task.

Describe what modes (written, oral, video, simulation, direct observation, peer discussion, etc.) are expected/possible.

Students respond via data table entry, mathematical calculations, manipulation of a simulation, written analysis questions, and creation of a two-scale diagrammatic model with written explanation.

iii. The task is accessible, appropriate, and cognitively demanding for all learners (including English learners or students working below/above grade level).

Features Yes Somewhat No Rationale
Task includes appropriate scaffolds [x] [ ] [ ] The task builds from observation to data collection to analysis to modeling, scaffolding the complexity
Tasks are coherent from a student perspective [x] [ ] [ ] The 5E structure provides a natural narrative flow for the investigation
Tasks respect and advantage students’ cultural and linguistic backgrounds [x] [ ] [ ] Context is kept universally accessible without niche cultural references
Tasks provide both low- and high-achieving students with an opportunity to show what they know [x] [ ] [ ] Accessible data collection paired with rigorous multi-scale modeling allows multiple entry points
Tasks use accessible language [x] [ ] [ ] Technical vocabulary (pressure, volume, kinetic energy) is introduced in context

iv. The task cultivates students’ interest in and confidence with science and engineering.

Consider how the task cultivates students interest in and confidence with science and engineering, including opportunities for students to reflect their own ideas as a meaningful part of the task; make decisions about how to approach a task; engage in peer/self-reflection; and engage with tasks that matter to students.

By empowering students to act as scientists investigating a tangible phenomenon via an interactive gas simulation, the task fosters engagement and confidence in experimental design and model development.

v. The task focuses on performances for which students’ learning experiences have prepared them (opportunity to learn considerations).

Consider the ways in which provided information about students’ prior learning (e.g., instructional materials, storylines, assumed instructional experiences) enables or prevents students’ engagement with the task and educator interpretation of student responses.

The task assumes basic knowledge of states of matter and the concept of pressure, but scaffolds the specific Boyle’s Law relationship and particle model concepts directly within the activity.

vi. The task presents information that is scientifically accurate.

Describe evidence of scientific inaccuracies explicitly or implicitly promoted by the task.

All pressure-volume relationships and Boyle’s Law calculations accurately reflect established thermodynamic principles for ideal gases at constant temperature.

Evidence of quality for Criterion C: [ ] No [ ] Inadequate [ ] Adequate [x] Extensive

Suggestions for improvement of the task for Criterion C:

Provide scaffolding options for the mathematical calculations (P×V, Boyle’s Law prediction) for students who struggle with algebraic manipulation.

Criterion D. Tasks support their intended targets and purpose.

Before you begin:

  1. Describe what is being assessed. Include any targets provided, such as dimensions, elements, or PEs:

The task assesses students’ ability to develop and use a multi-scale model of gas behavior to illustrate that energy at the macroscopic scale can be accounted for as a combination of kinetic energy (particle motion) and potential energy (relative particle positions), aligned to HS-PS3-2.

  1. What is the purpose of the assessment? (check all that apply)
    • [x] Formative (including peer and self-reflection)
    • [ ] Summative
    • [ ] Determining whether students learned what they just experienced
    • [ ] Determining whether students can apply what they have learned to a similar but new context
    • [ ] Determining whether students can generalize their learning to a different context
    • [ ] Other (please specify): N/A

i. The task assesses what it is intended to assess and supports the purpose for which it is intended.

Consider the following:

  1. Is the assessment target necessary to successfully complete the task?

Yes, understanding that macroscopic pressure arises from particle-level kinetic energy and that energy is conserved during compression is essential to correctly answering the sensemaking prompts and constructing the two-scale model.

  1. Are any ideas, practices, or experiences not targeted by the assessment necessary to respond to the task? Consider the impact this has on students’ ability to complete the task and interpretation of student responses.

Basic algebraic manipulation is required to solve Boyle’s Law problems and calculate P×V values, which might act as a barrier if not scaffolded.

  1. Do the student responses elicited support the purpose of the task (e.g., if a task is intended to help teachers determine if students understand the distinction between cause and correlation, does the task support this inference)?

The creation of a two-scale model directly supports assessing whether students understand the causal mechanism (particle collisions) behind the observed pressure-volume relationship.

ii. The task elicits artifacts from students as direct, observable evidence of how well students can use the targeted dimensions together to make sense of phenomena and design solutions to problems.

Consider what student artifacts are produced and how these provide students the opportunity to make visible their 1) sense-making processes, 2) thinking across all three dimensions, and 3) ability to use multiple dimensions together [note: these artifacts should connect back to the evidence described for Criterion B].

The final two-scale model explicitly ties empirical data from the simulation (SEP) to the flow of energy during compression (CCC) and the particle-level definition of energy in a gas (DCI), providing an observable artifact of three-dimensional learning.

iii. Supporting materials include clear answer keys, rubrics, and/or scoring guidelines that are connected to the three-dimensional target. They provide the necessary and sufficient guidance for interpreting student responses relative to the purpose of the assessment, all targeted dimensions, and the three-dimensional target.

Consider how well the materials support teachers and students in making sense of student responses and planning for follow up (grading, instructional moves), consistent with the purpose of and targets for the assessment. Consider in what ways rubrics include:

  1. Guidance for interpreting student thinking using an integrated approach, considering all three dimensions together as well as calling out specific supports for individual dimensions, if appropriate:

The teacher notes clearly break down how student responses map to the SEPs, DCIs, CCCs, and the exact NGSS evidence statements for HS-PS3-2.

  1. Support for interpreting a range of student responses, including those that might reflect partial scientific understanding or mask/misrepresent students’ actual science understanding (e.g., because of language barriers, lack of prompting or disconnect between the intent and student interpretation of the task, variety in communication approaches):

Multiple response modalities (data table, calculations, analysis questions, diagrammatic model) allow teachers to pinpoint exactly where a student’s understanding might be breaking down.

  1. Ways to connect student responses to prior experiences and future planned instruction by teachers and participation by students:

The elaboration section prompts students to explore how adding more gas affects pressure, connecting their learning to the broader concept of the ideal gas law and preparing them for future instruction on Charles’s Law and the combined gas law.

iv. The task’s prompts and directions provide sufficient guidance for the teacher to administer it effectively and for the students to complete it successfully while maintaining high levels of students’ analytical thinking as appropriate.

Consider any confusing prompts or directions, and evidence for too much or too little scaffolding/supports for students (relative to the target of the assessment—e.g., a task is intended to elicit student understanding of a DCI, but their response is so heavily scripted that it prevents students from actually showing their ability to apply the DCI).

The 5E layout and precise step-by-step instructions for the simulation guide students without providing the answers, ensuring high cognitive demand is maintained particularly in the model-building phase of Part 4.

Evidence of quality for Criterion D: [ ] No [ ] Inadequate [ ] Adequate [x] Extensive

Suggestions for improvement of the task for Criterion D:

Ensure teachers have access to a fully solved data table and sample student models for scoring reference.

Overall Summary

Consider the task purpose and the evidence you gathered for each criterion. Carefully consider the purpose and intended use of the task, your evidence, reasoning, and ratings to make a summary recommendation about using this task. While general guidance is provided below, it is important to remember that the intended use of the task plays a big role in determining whether the task is worth students’ and teachers’ time.

The “Boyle’s Law: The Squeeze on Gas Particles” task is highly aligned with the NGSS. It effectively engages students with an anchoring phenomenon (squeezing a balloon) and guides them through an authentic investigation using the Boyle’s Law gas simulation. Students must synthesize their understanding of energy at the particle level (DCI: PS3.A), trace energy flow during compression (CCC: Energy and Matter), and develop a multi-scale model of gas behavior (SEP: Developing and Using Models). The task scores extensive across all criteria due to its robust integration of three-dimensional learning and sensemaking.

Final recommendation (choose one):