Science as a human endeavour

Year 10 answers

Fluency

Research $\to$ write-up $\to$ submit to a journal $\to$ peer review $\to$ publication $\to$ replication by other labs $\to$ consensus.
Independent experts evaluate a manuscript for methodology, statistical rigour, novelty and conclusions before publication. Reviewers are usually researchers in the same field.
Replication guards against chance findings, flukes, fraud, and mistakes. A result that can’t be reproduced is treated as unreliable.
Examples: stomach ulcers (stress $\to$ H. pylori); plate tectonics (static Earth $\to$ moving plates); the “four humours” theory of disease; Newtonian absolute space (modified by relativity).
The shared, evidence-based position of most experts in a field, arrived at through repeated testing and peer review.

Fluency

Electron microscope $\to$ cellular ultrastructure; particle accelerators $\to$ discovery of sub-atomic particles; space telescopes $\to$ exoplanets. (Any reasonable example.)
Understanding of electromagnetism $\to$ electric motors and generators; semiconductor physics $\to$ computers; DNA structure $\to$ genetic engineering. (Any reasonable example.)
The virus genome was sequenced in days and shared online. Scientists could design candidate vaccine mRNA without isolating the virus in every lab.
PCR, DNA sequencers (especially next-generation), CRISPR, cryo-EM, high-throughput screening. (Any one.)
Hubble, James Webb, Kepler, adaptive optics, radio interferometers like ALMA. (Any one.)

Reasoning

Media attention, social amplification, and confirmation bias make a striking claim stick. Retractions receive far less coverage than the original claim, so the false idea persists.
The phrasing falsely suggests scientific uncertainty where there is overwhelming consensus on the physics. Genuine debate exists on policy and on details (like the exact rate of ice-sheet melt), not on the core claim.
A minority scientific opinion is held by credentialed researchers presenting evidence through peer review. A contested public claim may not have scientific support at all; the “controversy” may be manufactured by groups with non-scientific interests.
Check the source of the video, what “toxins” are specified (all vaccines contain some chemical ingredients, many in tiny doses); compare to authoritative sources (WHO, NHMRC, peer-reviewed studies); check whether the video’s author is a qualified expert and cites evidence.
Consensus emerges from many independent researchers each examining the evidence. It is a measure of how well a claim holds up under repeated challenge, not a vote on preferred conclusions.

Problem solving

For: could buy time to reduce emissions; effective in preliminary models; cheap compared to mitigation. Against: unknown side effects on rainfall and ecosystems; governance — who decides?; may discourage emission reduction (moral hazard). (Any two each.)
Bias in training data (may underperform on under-represented skin types); liability if AI errs; transparency of decisions; consent and patient trust; deskilling of dermatologists; privacy of medical data. (Any three.)
Cultural bias, lack of formal recording in Western-science formats, and historical exclusion. Change requires genuine partnerships, funding for Indigenous-led research, and recognising oral knowledge as valid evidence when supported by outcomes.
Bias: companies may suppress negative-result studies and fund research likely to show their drug favourably. Mitigations: mandatory pre-registration of clinical trials, open-data requirements, independent replication, disclosure of funding sources.
It corrupts the collective record; other scientists may waste years building on false results; the public loses trust in the field. Science depends on honesty because no one can personally check every result.

Reasoning

Sample size? Was it peer-reviewed? Was it randomised and controlled? Who funded it? Were effects small or large? Were other variables controlled (diet, exercise)? Have other studies confirmed it? What population was studied? (Any five.)
Nutrition science relies on observational studies of large populations, which can produce varying results. Media often reports each new study as if it overturns the previous one; in reality, the body of evidence evolves slowly. What is missed: mainstream dietary advice has been stable for decades (vegetables good, processed foods bad). Individual studies are snapshots; consensus is the long-run trend.
Answers will vary; reasonable answers note the scientific consensus, the distinction between scientific and policy disagreements, and a considered view linking evidence to action.
Research follows money; profit-driven funding favours issues affecting wealthy markets. Neglected-disease burden is high but paying capacity is low. Society-level correction (e.g. public funding of neglected-disease research, prize funds) is defensible on equity grounds.

Reasoning

Example: searches for life on Mars have not yet found clear evidence, but we have explored only a tiny fraction of the planet and its subsurface. Failure to detect yet does not prove absence. In public debate the phrase is misused to defend claims with no supporting evidence (“you can’t prove it isn’t true”), which misunderstands burden of proof.
Common features: single high-profile researcher, pressure to publish, plausible fit with expectations, insufficient independent verification before acclaim. Each was exposed when others failed to replicate or inspected raw data. Lessons: strengthen peer review, encourage replication, require data sharing, protect whistleblowers.
Positive results get published; negative results often sit unpublished, inflating apparent effect sizes. Fix: pre-registration requires researchers to publish their planned methods and predictions before running the study, and journals commit to publishing regardless of outcome.
Answers will vary. Reasonable responses note adaptive regulation, international coordination, transparent safety testing, public engagement, and the need for regulators to build technical expertise proactively rather than reactively.