AC9S4H01 • Homework

Using Data to Develop Scientific Explanations worksheet

Complete eight separate evidence and explanation tasks. Ask an adult to review the actual source, records and reasoning.

Open practice

Eight evidence and explanation tasks

Distinguish real observations from invented classroom model data. Record sources and uncertainty honestly.

  1. Read a teacher-selected short science article. Record title, authors and source. Identify a method, one result or figure and a conclusion; explain how each helps readers.

    Working: ____________________________________________________

  2. Watch or listen to a short teacher-previewed researcher report. Record title, speaker and source. Paraphrase one observation and one explanation. Mark missing dates, units or methods as unknown.

    Working: ____________________________________________________

  3. Model data: a car travels 45, 47 and 46 cm on card and 22, 24 and 23 cm on felt using the same release. Write a claim, use two values, explain how the surface could affect movement and state one limitation.

    Working: ____________________________________________________

  4. Model data: water A changes from 18°C to 25°C and water B from 30°C to 34°C over equal time. Which warmed more? Explain why the warmer final sample is not necessarily the one that warmed more.

    Working: ____________________________________________________

  5. Using the Topic Guide’s Richmond birdwing example, draw a link from suitable food vines to caterpillars. Explain how food-plant and butterfly records could guide a conservation action and one further check.

    Working: ____________________________________________________

  6. Model data: river rainfall is 30 mm in each of two months; more water is taken for use in month two and downstream flow is lower. Give a possible explanation and list two other records to check.

    Working: ____________________________________________________

  7. With an adult, read ACARA Teacher Background Information AC9S4H01_E5: https://www.australiancurriculum.edu.au/support-resources/background-information/science_teacher_background_information_AC9S4H01_E5 . Explain how repeated observations can help refine a technology. Identify what comes from the source and what is your own explanation.

    Working: ____________________________________________________

  8. Create a short report from real safe observations you have already made, or label a provided classroom data set as model data. Include question, method, results, explanation and one next check.

    Working: ____________________________________________________

Worked answers and adult review guide

  1. Identify the actual features and their different roles. Adult checks the cited article and the student’s examples. A method explains how records were gathered; a result supplies evidence; a conclusion interprets it. The title alone is not evidence.

  2. Distinguish an actual observation from the speaker’s interpretation. Adult checks the selected segment. Do not invent a quotation or value. Ask what evidence supports the explanation and what a listener would need to check.

  3. The car travelled farther on card in these trials; cite accurate distances and limit the claim. Check all six records are considered, units are cm and explanation relates motion to surface effects. One setup does not establish every car or surface result. Do not require formal averages.

  4. A rose by 7°C and B by 4°C, so A warmed more; B finished warmer. Adult checks subtraction and the distinction between change and final value. A fair comparison of conditions would also use matched starts.

  5. Connect suitable food to caterpillars and propose evidence-based protection or restoration with follow-up records. Require food relationships, repeated comparable surveys and an appropriate caveat about other threats. Do not handle wildlife or unidentified plants. The classroom diagram must not pretend to be a real survey.

  6. Greater water use may contribute; check records such as storage releases, timing, upstream inputs or earlier rainfall. Adult checks cautious causation and distinction between rainfall and river flow. Equal monthly rainfall does not guarantee identical timing, soil conditions or flow.

  7. Attribute the account and connect observations, checking predictions and refinement. Adult selects an age-appropriate passage; discuss rather than reproduce hazardous processes. Do not invent historical numbers, generalise to every community or claim a classroom model is an authentic cultural practice.

  8. Produce a traceable report whose explanation matches its recorded evidence. Adult verifies the source of each value, checks units and conditions, and asks why the results support the claim. Model data must be labelled; missing observations must not be fabricated. A complete layout alone does not demonstrate understanding.