Observing and Measuring
Not publishedof exam
InstrumentsUnitsScale readingDirect observationsMeasurement quality
Interpreting
Not publishedof exam
GraphsTablesDiagramsPatternsScientific models
Predicting and Concluding
Not publishedof exam
EvidencePredictionsConclusionsClaimsInference
Investigating
Not publishedof exam
VariablesFair testsControlsReliabilityExperimental design
Reasoning and Problem Solving
Not publishedof exam
Novel contextsScientific principlesCalculationsLogicEvaluation
Quick Facts
- Provider
- Janison ICAS Assessments
- Australian levels
- Years 2-12
- Paper ladder
- Intro through J
- Official skills
- 5
- Knowledge areas
- 4
- Intro through B
- 30 questions; 45 minutes
- Papers C and D
- 40 questions; 55 minutes
- Papers E through J
- 40 questions; 60 minutes
- Pass mark
- None
- Delivery
- Supervised online assessment
- Australia 2026 window
- August 17-21
- Fees
- Vary by country and school
Observation vs Inference
Observation
- Directly detected
- Camera could record it
- May include measurement
Inference
- Explains observations
- Requires reasoning
- Alternatives may fit
Evidence first; explanation second
Measurement Reading Loop
- Instrument is shown→Identify measured quantity(Match correct unit)
- Scale has labels→Calculate smallest division(Count spaces)
- Object starts above zero→Subtract start value(Do not report endpoint)
- Liquid level is curved→Read meniscus eye-level(Use intended edge)
- Readings disagree→Repeat and inspect method(Check calibration)
- Recording the result→Include value and unit(Use sensible precision)
Observation and Measurement Language
- Observation
- Directly sensed or measured
- Inference
- Explanation built from evidence
- Qualitative
- Describes a quality
- Quantitative
- Includes number and unit
- Accuracy
- Closeness to accepted value
- Precision
- Closeness among repeated values
- Resolution
- Smallest detectable scale change
- Repeat measurement
- Reduces random error influence
- Anomalous value
- Check before excluding
- Systematic record
- Use table or labelled sketch
Accuracy vs Precision
Accuracy
- Near accepted value
- Calibration improves it
- Can lack repeatability
Precision
- Repeated values cluster
- Resolution affects it
- Can share systematic error
Correctness versus repeatability
Instruments and Units
- Length
- Ruler; metres
- Mass
- Balance; grams
- Force
- Spring balance; newtons
- Temperature
- Thermometer; degrees Celsius
- Time
- Stopwatch; seconds
- Liquid volume
- Measuring cylinder; millilitres
- Irregular volume
- Use water displacement
- Wind speed
- Anemometer
- Air pressure
- Barometer
- Rainfall
- Rain gauge; millimetres
- Microscopic detail
- Microscope
- Distant detail
- Binoculars or telescope
Scale Reading Essentials
- First check
- Read quantity and unit
- Small division
- Divide labelled interval
- Non-zero start
- Subtract starting reading
- Aqueous meniscus
- Read bottom at eye-level
- Parallax error
- Viewing angle shifts reading
- Instrument choice
- Match range and resolution
- Recorded value
- Always include unit
- Unit conversion
- Convert before calculating
- Kilo
- One thousand times base
- Milli
- One thousandth of base
- Centi
- One hundredth of base
TAILS Graph Check
Title, Axes, Intervals, Labels, Scale
Read titleCheck axesCount intervalsFind unitsInspect scale
Interpolation vs Extrapolation
Interpolation
- Inside measured range
- Nearby evidence surrounds estimate
- Usually safer
Extrapolation
- Beyond measured range
- Pattern may change
- Needs caution
Distance from evidence increases risk
Data Display Reading Loop
- Display first appears→Read title and legend(Identify context)
- Axes are present→Read labels and units(Inspect scale spacing)
- Exact value is requested→Trace to data mark(Avoid nearby cell)
- Trend is requested→Name variables and direction(Mention plateau or anomaly)
- Prediction is requested→Extend nearby pattern cautiously(Avoid distant extrapolation)
- Option seems plausible→Verify against display(Stimulus outranks memory)
Graphs and Tables
- Graph title
- Defines displayed relationship
- Horizontal axis
- Often independent variable
- Vertical axis
- Often dependent variable
- Axis labels
- Need quantity and unit
- Scale
- Check spacing before reading
- Legend
- Separates data series
- Bar graph
- Compares separate categories
- Line graph
- Shows continuous change
- Pie chart
- Shows parts of whole
- Table
- Preserves exact values
- Exact cell
- Trace row and column
- Truncated axis
- Can exaggerate differences
RACE Data Routine
Read, Ask, Cite, Evaluate
Read displayIdentify targetCite evidenceEvaluate answer
Models, Maps, and Diagrams
- Scientific model
- Useful but simplified
- Food-web arrow
- Energy moves toward eater
- Circuit diagram
- Trace complete conducting path
- Dichotomous key
- Follow observable paired choices
- Contour line
- Joins equal elevation
- Close contours
- Steep slope
- Wide contours
- Gentle slope
- Scale bar
- Converts drawing distance
- Weather high
- Often settled conditions
- Weather low
- Often unsettled conditions
- Close isobars
- Stronger winds
Patterns and Trends
- Positive trend
- Both variables increase
- Negative trend
- One rises; other falls
- Plateau
- Dependent variable levels off
- Linear pattern
- Roughly constant rate
- Ratio pattern
- Proportional relationship
- Outlier
- Point outside main pattern
- Interpolation
- Estimate within measured range
- Extrapolation
- Estimate beyond measured range
- Correlation
- Variables change together
- Causation
- One variable produces change
- Pattern statement
- Name variables and direction
CER Scientific Explanation
Claim, Evidence, Reasoning
Answer questionCite dataLink scientific principle
Result vs Conclusion
Result
- Measured observation
- Belongs in table
- No explanation required
Conclusion
- Interprets results
- Answers investigation question
- Must match scope
Data first; meaning second
Conclusion Validity Checker
- Conclusion cites no evidence→Reject unsupported claim(Find measured result)
- Claim exceeds tested range→Narrow conclusion(Avoid overgeneralising)
- Variables merely correlate→Avoid causal wording(Confounders may exist)
- One result is unusual→Check and repeat(Do not erase reflexively)
- Evidence matches prediction→Say hypothesis supported(Never call it proven)
- Evidence contradicts prediction→Revise or reject(Report honestly)
Prediction and Conclusion Rules
- Prediction
- Expected evidence-based outcome
- Hypothesis
- Testable explanatory prediction
- If-then form
- Links cause and response
- Because clause
- States scientific reasoning
- Result
- What was measured
- Conclusion
- What results mean
- Valid conclusion
- Matches tested evidence
- Scope
- Stay within tested conditions
- Unsupported absolute
- All, always, never
- Conflicting evidence
- Weakens the claim
- Anomaly
- Investigate before concluding
Scientific Claim Evaluation
- Claim
- Testable answer or explanation
- Evidence
- Relevant measured observations
- Reasoning
- Connects evidence to claim
- Comparison group
- Shows relative effect
- Sample size
- Larger reduces individual variation
- Representative sample
- Matches target population
- Source independence
- Reduces vested-interest concern
- Quantitative claim
- Needs numerical evidence
- Alternative explanation
- May also fit observations
- Single photograph
- Weak comparative evidence
COWS Fair Test
Change One, Watch result, Same others
Change one factorObserve responseMeasure outcomeKeep others same
Independent vs Dependent Variable
Independent
- Researcher changes it
- Usually horizontal axis
- Cause under test
Dependent
- Researcher measures it
- Usually vertical axis
- Observed response
Change X; measure Y
Fair Test Builder
- Question is defined→Name X and Y(Changed then measured)
- Hypothesis is written→Add scientific reason(Keep it testable)
- Groups are prepared→Hold other factors constant(Add baseline when useful)
- Measurement is selected→Choose suitable instrument(Record units)
- Method is drafted→Specify amounts and timing(Make repeatable)
- Natural variation exists→Increase sample size(Select without bias)
- Trials are complete→Repeat and average(Review anomalies)
- Results are ready→Choose suitable display(Conclude within evidence)
Variables and Controls
- Independent variable
- Deliberately changed factor
- Dependent variable
- Measured response
- Controlled variable
- Held constant
- Control setup
- Baseline comparison condition
- Fair test
- Only intended factor changes
- Experimental question
- How does X affect Y?
- Operational definition
- States exactly how measured
- Confounding variable
- Unplanned competing explanation
- Random allocation
- Reduces group-selection bias
- Placebo
- Controls expectation effects
- Blinding
- Reduces observer or subject bias
FAIR Investigation Check
Factor, Assessment, Identical conditions, Repeats
Factor changedAssessment measuredIdentical controlsRepeat trials
Control vs Controlled Variable
Control setup
- Whole baseline group
- Normal or untreated condition
- Enables comparison
Controlled variable
- Single held-constant factor
- Same across groups
- Protects fair test
Baseline group versus fixed factor
Experiment Quality
- Reliability
- Repeated results remain similar
- Validity
- Method tests intended question
- Accuracy
- Result approaches accepted value
- Repetition
- Same investigator repeats trials
- Replication
- Independent investigators repeat study
- Larger sample
- Reduces random biological variation
- Calibration
- Checks instrument against standard
- Clear method
- Another student can repeat
- Risk assessment
- Identifies hazards and controls
- Living subjects
- Minimise harm and distress
- Unexpected result
- Repeat before discarding
Reliability vs Validity
Reliability
- Results repeat consistently
- More trials can improve
- Random error matters
Validity
- Tests intended question
- Fair design matters
- Confounders weaken it
Consistent is not necessarily valid
Investigation Cycle
- Question
- Define testable relationship
- Hypothesis
- Predict with reason
- Method
- Specify steps, amounts, units
- Results table
- Design before collecting
- Data collection
- Use consistent technique
- Analysis
- Find pattern and anomalies
- Conclusion
- Answer using evidence
- Evaluation
- Identify limits and improvements
- Categorical data
- Display with bars
- Continuous data
- Display with line graph
- Exact results
- Preserve in table
GASP Problem Solver
Given, Asked, Science, Plausibility
List givensRestate questionApply scienceCheck plausibility
Physical vs Chemical Change
Physical
- No new substance
- Particles rearrange physically
- Often easily reversed
Chemical
- New substances form
- Atoms rearrange chemically
- Evidence needs interpretation
Ask whether substance identity changed
Skill Area Picker
- Read instrument or feature→Observe and measure(Report directly)
- Explain graph or diagram→Interpret(Extract displayed meaning)
- Forecast or infer→Predict and conclude(Use given evidence)
- Evaluate experimental method→Investigate(Check variables and controls)
- Apply science in novelty→Reason and solve(Find familiar principle)
- Several skills appear→Answer requested skill(Read command verb)
Australian Paper Level Map
- Intro paper
- Year 2
- Paper A
- Year 3
- Paper B
- Year 4
- Paper C
- Year 5
- Paper D
- Year 6
- Paper E
- Year 7
- Paper F
- Year 8
- Paper G
- Year 9
- Paper H
- Year 10
- Paper I
- Year 11
- Paper J
- Year 12
- International mapping
- Check official country table
Series vs Parallel Circuits
Series
- One pathway
- Same current throughout
- One break stops circuit
Parallel
- Multiple pathways
- Branches act independently
- Other branches can continue
Trace paths before predicting
Unfamiliar Problem Loop
- Scenario looks unfamiliar→List given facts(Ignore decorative detail)
- Target feels unclear→Restate exact question(Underline command word)
- Principle is hidden→Sketch the relationships(Find familiar science)
- Numbers use mixed units→Convert before calculating(Write relationship first)
- Options remain close→Eliminate impossible choices(Use scale and signs)
- Answer is chosen→Check magnitude and unit(Interpret in context)
Timing and Achievement Bands
- Intro, A, B
- Thirty questions; forty-five minutes
- Papers C, D
- Forty questions; fifty-five minutes
- Papers E-J
- Forty questions; sixty minutes
- High Distinction
- Top one percent
- Distinction
- Next ten percent
- Credit
- Next twenty-five percent
- Merit
- Next ten percent
- Participation
- All remaining participants
- Award basis
- Same-year peer performance
- Medal
- Top eligible regional performance
- Fixed pass mark
- Does not exist
Weather vs Climate
Weather
- Short-term conditions
- Specific place and time
- Changes quickly
Climate
- Long-term pattern
- Uses many years
- Describes typical conditions
Event versus long-term pattern
Official Knowledge Areas
- Earth and Beyond
- Earth, weather, space
- Natural and Processed Materials
- Matter, properties, reactions
- Life and Living
- Organisms, systems, ecosystems
- Energy and Change
- Energy, forces, waves
- Early papers
- Observable everyday contexts
- Middle papers
- Systems and models
- Senior papers
- Abstract multi-step reasoning
- Skill transfer
- Works across every area
Unfamiliar Problem Toolkit
- Given
- List stimulus facts
- Asked
- Name exact target
- Principle
- Choose relevant science
- Diagram
- Sketch relationships
- Units
- Make quantities compatible
- Estimate
- Predict reasonable magnitude
- Elimination
- Remove impossible choices
- Calculation
- Show relationship before numbers
- Interpretation
- Explain result in context
- Sanity check
- Check sign, unit, magnitude
- Stimulus evidence
- Overrides unsupported assumption
Quantitative Relationships
- Speed
- Distance divided by time
- Distance
- Speed multiplied by time
- Density
- Mass divided by volume
- Acceleration
- Speed change divided by time
- Average
- Total divided by count
- Percentage
- Part divided by whole
- Ratio
- Compare quantities consistently
- Gradient
- Vertical change over horizontal
- Proportion
- Constant multiplicative relationship
- Unit check
- Convert before substitution
- Round-number estimate
- Catches arithmetic slips
Materials and Matter
- Solid particles
- Vibrate in fixed positions
- Liquid particles
- Remain close; move past
- Gas particles
- Far apart; move freely
- Melting
- Solid to liquid
- Condensation
- Gas to liquid
- Physical change
- No new substance
- Chemical change
- New substances form
- Conservation of mass
- Track closed-system mass
- Dissolving
- Solute disperses through solvent
- Filtration
- Separates insoluble solid
- Evaporation
- Recovers dissolved solid
- Material choice
- Match properties to purpose
Energy, Forces, and Waves
- Conduction
- Heat transfers through contact
- Convection
- Moving fluids transfer heat
- Radiation
- Transfers through electromagnetic waves
- Balanced forces
- Motion remains unchanged
- Net force
- Changes motion
- Friction
- Opposes relative surface motion
- Series circuit
- One current pathway
- Parallel circuit
- Multiple current pathways
- Light
- Travels in straight lines
- Sound
- Vibration needing a medium
- Pitch
- Depends on frequency
- Magnetic poles
- Like repel; unlike attract
- Meshed gears
- Turn opposite directions
Life and Living
- Cell membrane
- Controls substance movement
- Nucleus
- Contains genetic information
- Chloroplast
- Site of photosynthesis
- Photosynthesis
- Makes glucose using light
- Respiration
- Releases usable cellular energy
- Producer
- Makes its own food
- Consumer
- Obtains energy by feeding
- Decomposer
- Recycles dead organic matter
- Adaptation
- Feature improving survival
- Food web change
- Trace direct and indirect effects
- Random quadrats
- Estimate stationary populations
- Dichotomous key
- Identifies by paired features
Earth and Beyond
- Igneous rock
- Cooled magma or lava
- Sedimentary rock
- Compacted cemented sediments
- Metamorphic rock
- Changed by heat and pressure
- Superposition
- Lowest undisturbed layer oldest
- Index fossil
- Correlates rock-layer ages
- Water cycle
- Sun-powered water movement
- Weather
- Short-term atmospheric conditions
- Climate
- Long-term weather pattern
- Day and night
- Caused by Earth's rotation
- Seasons
- Caused by axial tilt
- Moon phases
- Changing sunlit portion viewed
- Plate tectonics
- Explains quakes and volcanoes
Common Traps
The Stimulus Wins
Use displayed evidence ≠ Ignore unsupported memory
Read Units Before Numbers
Mixed units distort comparisons ≠ Convert before calculating
Endpoint Is Not Length
Check ruler starting value ≠ Subtract start from finish
Trend Is Not Exact Value
Answer requested data type ≠ Trace precise evidence
True Can Be Irrelevant
Answer exact question ≠ Reject unrelated science facts
Correlation Is Not Causation
Other factors may explain ≠ Causal claims need design
An Outlier Needs Checking
Do not delete automatically ≠ Repeat the measurement
One Trial Proves Little
Repeat under same conditions ≠ Increase sample size
Control Has Two Meanings
Baseline differs from constant ≠ Read wording carefully
Absolute Words Need Evidence
All and never overreach ≠ Stay within tested scope
Credit Ranks Above Merit
Credit follows Distinction ≠ Merit follows Credit
Paper Level Changes Logistics
Question count varies ≠ Time limit varies
Last Minute
- 1.Confirm country paper mapping
- 2.Know your exact time limit
- 3.Read stimulus before assumptions
- 4.Check every displayed unit
- 5.Calculate scale intervals
- 6.Separate observation from inference
- 7.Describe trends with both variables
- 8.Keep conclusions within evidence
- 9.Identify changed and measured variables
- 10.Separate control from constants
- 11.Check reliability and validity
- 12.Convert units before calculations
- 13.Estimate answer magnitude
- 14.Review unanswered questions
- 15.Use official past-paper practice
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