Parent plan · Week 13 · Chemistry — investigate and assess — Physical Science: Matter, Forces & Energy

Parent teaching plan · 36 weeks

Units to teach or revisit

Chapter 3 · Chemistry

Assigned readings

Chapter 3 continues one explanation across five smaller units. Questions from the launch should remain active as new evidence is added.

This week’s goals

Read the chapter launch and assigned unit sections on their linked lesson pages. Keep the launch model and return to it after each new evidence comparison.

Five flexible sessions of about 40–45 minutes. Formal papers may join consecutive sessions; take the stated total exam time. Slow down and replace a flex task with reteaching when evidence of understanding is incomplete.

Session 1 · Account for matter in a reaction — Plan and predict

Use three sessions: plan the question, boundary and predicted mechanism; collect safe records or analyze the supplied data; then graph, explain, compare with the initial model and propose a revision. The data option needs no special equipment. Time is a suggested allocation, not a measured completion claim.

Your task

Can a lower measured mass in an open container mean that matter was destroyed? Choose the safe observation or supplied-data route. Draw the boundary and initial model and define the question, variables and recording rule. Include the thermal-device design route: plan, construct/observe or analyze supplied records, then revise and retest. Preserve the original matter/atom account and never perform a sealed gas-producing reaction. Extend the proposed schedule if the actual retests need additional time.

  1. Make a notice-and-wonder record. State one observation, one possible explanation and a question the investigation can address. Agree on the measuring rule before seeing the results.
  2. Draw the boundary of each system. Decide what the balance measures before interpreting the data.
  3. Keep safety, units and the data source explicit.
  4. Explain what would support or challenge the predicted mechanism.
Hint and response guidance

Use the assigned unit’s figures, captions and worked examples. Identify conditions and units before choosing a relationship.

Each illustrative open trial lost 1.6 g from the measured system, while each closed trial retained its initial mass. Gas moving out of the open boundary can explain the lower measured mass without atoms being destroyed. Repeat measurements and measurement uncertainty should also be considered. Predict what a complete matter boundary should include. Distinguish a gas escaping the measured boundary from atoms being destroyed. A complete report separates observation from inference. Preserve all planned trials, including a result that does not fit the prediction, and distinguish missing readings from zeros. The supplied numbers are illustrative, not records the learner collected. If observations differ, check the method, units and conditions before deciding which claim is supported. A schematic model should connect parts through a mechanism and explicitly name its limits. Describe a follow-up that changes one intended condition, keeps influential others comparable, and states the possible result that would challenge the explanation. A proposed improvement is not confirmed until it is retested. Different defensible conclusions can receive credit when they use the actual evidence and meet the stated criteria.

  • Calculate at least one mass difference with units.
  • Make the system boundary explicit.
  • Use conservation of atoms to connect the data to the claim.
  • Identify the system, relevant variables and measurement method.
  • Explain a model revision and a specific uncertainty.

Session 2 · Account for matter in a reaction — Record and analyze

Use three sessions: plan the question, boundary and predicted mechanism; collect safe records or analyze the supplied data; then graph, explain, compare with the initial model and propose a revision. The data option needs no special equipment. Time is a suggested allocation, not a measured completion claim.

Your task

Follow the method and preserve all planned records, or label and analyze the illustrative dataset. Make a graph or comparison with units, include relevant calculations, and compare outcomes. Include the thermal-device design route: plan, construct/observe or analyze supplied records, then revise and retest. Preserve the original matter/atom account and never perform a sealed gas-producing reaction. Extend the proposed schedule if the actual retests need additional time.

  1. Make a notice-and-wonder record. State one observation, one possible explanation and a question the investigation can address. Agree on the measuring rule before seeing the results.
  2. Calculate the measured mass change in each trial.
  3. Keep safety, units and the data source explicit.
  4. Explain what would support or challenge the predicted mechanism.
Hint and response guidance

Use the assigned unit’s figures, captions and worked examples. Identify conditions and units before choosing a relationship.

Each illustrative open trial lost 1.6 g from the measured system, while each closed trial retained its initial mass. Gas moving out of the open boundary can explain the lower measured mass without atoms being destroyed. Repeat measurements and measurement uncertainty should also be considered. Predict what a complete matter boundary should include. Distinguish a gas escaping the measured boundary from atoms being destroyed. A complete report separates observation from inference. Preserve all planned trials, including a result that does not fit the prediction, and distinguish missing readings from zeros. The supplied numbers are illustrative, not records the learner collected. If observations differ, check the method, units and conditions before deciding which claim is supported. A schematic model should connect parts through a mechanism and explicitly name its limits. Describe a follow-up that changes one intended condition, keeps influential others comparable, and states the possible result that would challenge the explanation. A proposed improvement is not confirmed until it is retested. Different defensible conclusions can receive credit when they use the actual evidence and meet the stated criteria.

  • Calculate at least one mass difference with units.
  • Make the system boundary explicit.
  • Use conservation of atoms to connect the data to the claim.
  • Identify the system, relevant variables and measurement method.
  • Explain a model revision and a specific uncertainty.

Session 3 · Account for matter in a reaction — Explain and revise

Use three sessions: plan the question, boundary and predicted mechanism; collect safe records or analyze the supplied data; then graph, explain, compare with the initial model and propose a revision. The data option needs no special equipment. Time is a suggested allocation, not a measured completion claim.

Your task

Answer the analysis questions, connect evidence to the mechanism, evaluate against the criteria and propose a controlled revision. Write a 150–250-word report or an equivalent labeled visual and oral explanation. Include the thermal-device design route: plan, construct/observe or analyze supplied records, then revise and retest. Preserve the original matter/atom account and never perform a sealed gas-producing reaction. Extend the proposed schedule if the actual retests need additional time.

  1. Make a notice-and-wonder record. State one observation, one possible explanation and a question the investigation can address. Agree on the measuring rule before seeing the results.
  2. Represent reactants and products with labeled counters. Rearrange the same atoms rather than adding or removing them.
  3. Keep safety, units and the data source explicit.
  4. Explain what would support or challenge the predicted mechanism.
Hint and response guidance

Use the assigned unit’s figures, captions and worked examples. Identify conditions and units before choosing a relationship.

Each illustrative open trial lost 1.6 g from the measured system, while each closed trial retained its initial mass. Gas moving out of the open boundary can explain the lower measured mass without atoms being destroyed. Repeat measurements and measurement uncertainty should also be considered. Predict what a complete matter boundary should include. Distinguish a gas escaping the measured boundary from atoms being destroyed. A complete report separates observation from inference. Preserve all planned trials, including a result that does not fit the prediction, and distinguish missing readings from zeros. The supplied numbers are illustrative, not records the learner collected. If observations differ, check the method, units and conditions before deciding which claim is supported. A schematic model should connect parts through a mechanism and explicitly name its limits. Describe a follow-up that changes one intended condition, keeps influential others comparable, and states the possible result that would challenge the explanation. A proposed improvement is not confirmed until it is retested. Different defensible conclusions can receive credit when they use the actual evidence and meet the stated criteria.

  • Calculate at least one mass difference with units.
  • Make the system boundary explicit.
  • Use conservation of atoms to connect the data to the claim.
  • Identify the system, relevant variables and measurement method.
  • Explain a model revision and a specific uncertainty.

Session 4 · Chapter review and model conference

Use evidence and models to explain chemical change, conserve atoms, and track energy transfer.

Your task

Complete the complete chapter-review set for the chapter, then connect the five units to the chapter launch. Draw a revised chapter model and explain two changes supported by evidence.

  1. Attempt all assigned review prompts, including the new visual-transfer cases.
  2. Identify the two ideas with weakest explanations.
  3. Review those units’ figures and worked examples.
  4. Give an evidence-based model conference.
Hint and response guidance

Use the assigned unit’s figures, captions and worked examples. Identify conditions and units before choosing a relationship.

Each illustrative open trial lost 1.6 g from the measured system, while each closed trial retained its initial mass. Gas moving out of the open boundary can explain the lower measured mass without atoms being destroyed. Repeat measurements and measurement uncertainty should also be considered. Predict what a complete matter boundary should include. Distinguish a gas escaping the measured boundary from atoms being destroyed. A complete report separates observation from inference. Preserve all planned trials, including a result that does not fit the prediction, and distinguish missing readings from zeros. The supplied numbers are illustrative, not records the learner collected. If observations differ, check the method, units and conditions before deciding which claim is supported. A schematic model should connect parts through a mechanism and explicitly name its limits. Describe a follow-up that changes one intended condition, keeps influential others comparable, and states the possible result that would challenge the explanation. A proposed improvement is not confirmed until it is retested. Different defensible conclusions can receive credit when they use the actual evidence and meet the stated criteria.

  • Show coverage of all five units.
  • Use two specific records.
  • Correct a named misunderstanding.

Session 5 · Chapter quiz and corrections

How can we tell when substances react, and what is conserved?

Your task

Complete all chapter quiz questions independently before opening guidance. Have written reasoning reviewed using the criteria. Correct errors with a new explanation and identify whether reteaching is needed.

  1. Attempt the quiz with the agreed reference rule.
  2. Compare objective answers or submit written work for human marking.
  3. Discuss the evidence and mechanism behind errors.
  4. Retest a changed case after correction.
Hint and response guidance

Use the assigned unit’s figures, captions and worked examples. Identify conditions and units before choosing a relationship.

Each illustrative open trial lost 1.6 g from the measured system, while each closed trial retained its initial mass. Gas moving out of the open boundary can explain the lower measured mass without atoms being destroyed. Repeat measurements and measurement uncertainty should also be considered. Predict what a complete matter boundary should include. Distinguish a gas escaping the measured boundary from atoms being destroyed. A complete report separates observation from inference. Preserve all planned trials, including a result that does not fit the prediction, and distinguish missing readings from zeros. The supplied numbers are illustrative, not records the learner collected. If observations differ, check the method, units and conditions before deciding which claim is supported. A schematic model should connect parts through a mechanism and explicitly name its limits. Describe a follow-up that changes one intended condition, keeps influential others comparable, and states the possible result that would challenge the explanation. A proposed improvement is not confirmed until it is retested. Different defensible conclusions can receive credit when they use the actual evidence and meet the stated criteria.

  • Use independent reasoning.
  • Keep pending written marks pending until reviewed.
  • Explain a corrected method.

Submit this week

Parent / teacher weekly conference

Start with the learner’s own explanation. Ask which record supports each claim, and which condition could change it. Check units, graph axes and model limits. Use supplied data without claiming it was experimentally measured at home. An oral explanation or accessible drawing can substitute for extended prose when it shows the same reasoning.

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