Trustworthy Science
Science • 50 • 30 students • Created with AI following Aligned with Australian Curriculum (F-10)
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Teaching Instructions
Use the template lesson focus attached and replace that information with the provided lesson plan below:
NSW Syllabus Outcomes INS11/12-5 Collaborates with others to plan and conduct investigations and communicate scientific understanding. Students work together to analyse evidence, discuss misconceptions, and communicate how scientific knowledge develops. INS11-11 Develops and evaluates questions and hypotheses for scientific investigation. Students begin questioning how scientists know whether ideas are trustworthy and develop an understanding of evidence-based scientific knowledge.
Lesson Learning Intentions By the end of this lesson students will be able to: Explain what science is and how scientific knowledge is developed. Distinguish between a scientific theory and a scientific law. Explain why reproducible evidence is essential to science. Recognise that scientific knowledge changes when new evidence becomes available. Evaluate examples of scientific theories and laws in everyday life.
Success Criteria Students can: ✓ Define scientific knowledge. ✓ Explain why scientific investigations must be reproducible. ✓ Compare theories and laws using real examples. ✓ Identify misconceptions about scientific theories. ✓ Describe why scientific knowledge is always open to refinement.
Key Inquiry Question How do scientists know something is true? This question underpins the entire Investigating Science course and introduces students to the Nature of Science.
Starter Activity (10 minutes) "Would You Believe It?" Display five statements. Students vote: Fact Theory Opinion Law Examples: Humans evolved from earlier species. Gravity causes objects to fall. Dinosaurs became extinct because of an asteroid. Drinking eight glasses of water every day is essential. Vaccines cause autism. After students vote, reveal that some of these statements have strong scientific evidence while others are myths. Lead into discussion: "How do we decide which information is trustworthy?" This naturally introduces scientific evidence.
Explicit Teaching (20 minutes) What is Science? According to the NSW syllabus: Science is not simply a collection of facts. Science is: evidence-based testable reproducible continually refined Scientific knowledge develops through: Observation ↓ Questions ↓ Hypotheses ↓ Testing ↓ Evidence ↓ Peer review ↓ Accepted scientific knowledge Emphasise: Scientific knowledge is the best explanation available based on current evidence, not absolute truth.
Reproducible Data Introduce the idea that: A scientific claim is only trustworthy if other scientists can obtain the same results. Examples: If one scientist discovers a medicine… Other laboratories around the world should obtain similar results. If nobody can reproduce the findings… Scientists investigate whether: the experiment was flawed variables were uncontrolled data was fabricated conclusions were incorrect
Modern Example Discuss the COVID-19 vaccines. Scientists from multiple countries repeated clinical trials involving tens of thousands of participants. Because the results were reproducible, governments accepted the evidence. Ask students: Would you trust a vaccine tested once on five people? This reinforces why reproducibility matters.
Mini Activity (5 minutes) Show students two headlines: Headline A "Scientists discover miracle weight-loss pill." Headline B "Independent laboratories confirm results after repeated trials." Students discuss: Which headline is more trustworthy? Why?
Theories vs Laws (15 minutes) This is often one of the biggest misconceptions students have. Present the following comparison. Scientific Theory Scientific Law Explains WHY something happens Describes WHAT happens Supported by extensive evidence Supported by repeated observations Can be refined with new evidence Can also be refined if evidence changes Explains mechanisms Describes patterns
Important misconception Many students believe: Theory → Law Explain clearly: This is false. A theory does not become a law. They answer different questions.
Example 1 Newton's Law of Gravity Describes: Objects attract one another. It predicts motion.
Einstein's Theory of General Relativity Explains: Why gravity exists. Gravity is caused by curved spacetime. One does not replace the other. Scientists still use Newton's Law every day because it accurately predicts motion in most situations.
Example 2 Germ Theory Explains Why diseases spread.
Laws of Thermodynamics Describe How energy behaves.
Interactive Group Activity (15 minutes) "Theory or Law?" Each group receives cards. Examples: Plate Tectonic Theory Theory of Evolution Cell Theory Gas Laws Newton's Laws of Motion Law of Conservation of Energy Students sort cards into: Theory Law Both describe scientific knowledge After sorting, groups explain WHY. Teacher addresses misconceptions.
Contemporary Case Study Pluto: Planet or Not? Ask students: Was Pluto always considered a planet? Explain: New evidence changed how astronomers defined planets. Science changed because evidence changed. This demonstrates: Scientific knowledge evolves.
Modern Example Artificial Intelligence in Science Scientists now use AI to: discover new medicines identify cancer cells predict protein structures analyse climate data Ask students: Can AI replace scientists? Lead discussion that AI analyses evidence but scientists still evaluate conclusions.
Class Discussion Prompt questions: Why don't scientists say something is "100% proven"? Can science ever be completely finished? Why do scientific ideas change? Is changing scientific ideas a weakness or a strength?
Expected conclusion: Changing ideas shows science is self-correcting.
Exit Ticket (5 minutes) Students answer individually. Define scientific knowledge. Explain the difference between a theory and a law. Why is reproducibility important? Give one example where scientific knowledge has changed.
Assessment for Learning The teacher will assess: participation in group discussion correct use of scientific terminology exit ticket responses ability to distinguish theories from laws
Literacy Focus Students learn and correctly use: evidence reproducible hypothesis observation scientific knowledge theory law peer review empirical evidence validity reliability
Differentiation Support Vocabulary scaffold with definitions and visuals. Sentence starters: "A scientific theory explains..." "A scientific law describes..." Mixed-ability group work. Extension Students investigate a historical example where scientific understanding changed due to new evidence, such as: the shift from the geocentric to heliocentric model, the acceptance of plate tectonics, the discovery of DNA's structure, the reclassification of Pluto. Students present why the evidence was initially resisted and how it eventually changed scientific consensus.
Homework / Inquiry Task Students find one example from recent science news where new evidence changed scientific understanding. They should identify: What scientists previously believed. What new evidence was discovered. How scientific knowledge changed. Whether the example involves a theory, a law, or another scientific explanation. This prepares students for future lessons on the evolving nature of science and reinforces the syllabus emphasis that scientific knowledge is dynamic, evidence-based, and continually refined.
Overview
Students investigate how scientific knowledge is developed, tested and refined. They build on prior understanding of scientific inquiry by evaluating claims, distinguishing theories from laws, and explaining why reproducible evidence strengthens scientific conclusions.
Learning intentions
Students will:
- Explain how scientific knowledge develops from evidence.
- Distinguish between a scientific theory and a scientific law.
- Explain why reproducible evidence is essential to trustworthy science.
- Recognise that scientific knowledge can be refined when new evidence becomes available.
- Evaluate scientific claims using appropriate evidence-based reasoning.
Success criteria
- I can define scientific knowledge.
- I can explain why investigations need to be reproducible.
- I can compare a theory and a law using real examples.
- I can identify misconceptions about science and explain why scientific knowledge remains open to refinement.
Curriculum links
- Develops and evaluates questions and hypotheses for scientific investigation.
- Collaborates with others to plan and conduct investigations and communicate scientific understanding.
- Designs and evaluates scientific investigations, including analysing evidence and communicating conclusions.
- Participates in solving scientific problems by questioning claims, evaluating evidence and discussing possible explanations.
Lesson structure (50 minutes)
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0–8 min · Introduction: “Would You Believe It?” Introduce Module 4: Theories and Laws and display “How do scientists know something is true?” Using Slides 1–5, students complete “Would You Believe It?”, classifying five scientific statements as fact, theory, opinion or law, then justify their choices with a partner. Use questioning to surface prior knowledge and misconceptions about theory and law.
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8–18 min · Part 1: What is Scientific Knowledge? Using Slides 6–7, explain that science is knowledge based on demonstrable and reproducible data. Establish that scientific knowledge is evidence-based, testable, reproducible and continually refined. Model Observation → Question → Hypothesis → Testing → Evidence → Peer Review → Scientific Knowledge. Students annotate and explain how evidence contributes. Emphasise that scientific knowledge is the best explanation supported by current evidence, not absolute unchangeable truth.
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18–26 min · Part 2: Why is Reproducibility Important? Using Slides 8–9, introduce a medical research example and ask whether students would trust a vaccine or treatment tested once on five people. Students think, pair-share and contribute. Explain that independent repetition increases confidence and can reveal errors, uncontrolled variables or unreliable conclusions. Students complete the worksheet response: “Reproducibility increases confidence in scientific evidence because…”
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26–31 min · Part 3: Trustworthy Headlines. Using Slide 10, compare “Scientists discover miracle weight-loss pill” with “Independent laboratories confirm results after repeated trials.” Students select the more trustworthy headline and justify their choice using evidence, reproducibility, reliability and validity. Reinforce evaluating claim quality rather than accepting a claim because it sounds scientific.
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31–35 min · Part 4: Artificial Intelligence and Science. Using Slide 11, discuss AI applications in medicine, protein prediction and climate data analysis. Ask whether scientists should accept an AI result without checking it. Students identify the importance of testing, evidence and independent evaluation, linking this to digital information and AI-generated claims.
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35–43 min · Part 5: Theories vs Laws. Using Slides 12–16, compare theory (an explanation for why/how phenomena occur) and law (a description of a consistent pattern or relationship in nature). Explicitly address: “A theory does not become a law.” Use gravity to compare Newton’s Law of Universal Gravitation with Einstein’s Theory of General Relativity. Groups classify and justify one of Plate Tectonic Theory, Theory of Evolution, Cell Theory, Gas Laws, Newton’s Laws of Motion, or Law of Conservation of Energy, using scientific terminology.
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43–47 min · Part 6: Scientific Knowledge Changes. Using Slides 17–18, discuss Pluto’s reclassification: why it changed, why ideas change, whether this makes science unreliable, and whether change is a weakness or strength. Establish that science is self-correcting and new evidence can refine, modify or reject explanations.
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47–50 min · Conclusion. Using Slide 19, students complete an exit ticket: define scientific knowledge; explain theory versus law; explain why reproducibility matters; and give one example of scientific knowledge changing. Collect responses to identify misconceptions and inform the next lesson.
Extension: Students investigate geocentric → heliocentric models, plate tectonic theory, DNA structure or Pluto’s reclassification using Previous explanation → New evidence → Scientific evaluation → Revised understanding, then judge whether the change demonstrates a weakness or strength of science.
Resources
- the Trustworthy Science slide deck
- the Trustworthy Science worksheet
- Projector or interactive display
- Student pens and highlighters
- Voting method, such as mini-whiteboards, fingers or an online poll
- Classroom board for recording key vocabulary
- Optional accessible digital or enlarged worksheet copies
Assessment
- Check voting explanations, partner discussion and use of evidence-based vocabulary during the hook and headline activity.
- Listen to group justifications during the theory-and-law comparison, particularly whether students understand that theories do not develop into laws.
- Use the exit responses to assess definitions, reproducibility, comparison of theories and laws, and understanding that scientific knowledge is refined by new evidence.
Differentiation
- Provide a vocabulary scaffold with definitions and visuals for evidence, reproducible, hypothesis, observation, theory, law, peer review, validity and reliability.
- Offer sentence starters such as “A scientific theory explains…”, “A scientific law describes…” and “This claim is more trustworthy because…”.
- Pair students strategically and provide a partially completed comparison table or word bank where required; read key statements aloud and allow typed or oral responses.
- Extend capable students by asking them to research a historical example, such as the shift from geocentric to heliocentric models, the acceptance of plate tectonics, the discovery of DNA’s structure or Pluto’s reclassification, and explain how new evidence changed scientific consensus.
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