ADAPT OR CHANGE · EVOLUTION OBSERVATORY: A simulated island population is declining, but one inherited trait is becoming more common. The environment changed — yet not every individual responded in the same way. Run the model across generations, isolate one variable, then decide what evidence is needed to explain the population shift without claiming that individuals evolved because they “needed to”.
ACTIVE OBJECTIVEADAPT OR CHANGE · EVOLUTION OBSERVATORY: A simulated island population is declining, but one inherited trait is becoming more common. The environment changed — yet not every individual responded in the same way. Run the model across generations, isolate one variable, then decide what evidence is needed to explain the population shift without claiming that individuals evolved because they “needed to”.
Optional: pen + paper for rough working if that helps you think.
HOW TO DO IT
Read or listen to the Briefing + Learn.
Do the interactive mission.
Use facts from the reading and maths parts.
Make your choice and save your project step.
Play the weekly game. Finish Check-in.
WORK YOUR WAY
Short bursts are fine. Use Learning Tools for easier reading, read-aloud, less on screen, stronger contrast, no-rush and quieter-screen options.
If you get stuck, look at the example and try again.
SCIENCE SAFETY: The science investigations in this Senior mission are designed as virtual/screen-based activities unless the page clearly says otherwise. Do not improvise mains electricity, heating or chemical experiments at home.
PROJECT NOTE: Your project can stay digital. Physical making is optional unless you choose that format.
MISSION BRIEFING
ADAPT OR CHANGE · EVOLUTION OBSERVATORY: A simulated island population is declining, but one inherited trait is becoming more common. The environment changed — yet not every individual responded in the same way. Run the model across generations, isolate one variable, then decide what evidence is needed to explain the population shift without claiming that individuals evolved because they “needed to”.
✓Distinguish inherited variation from acquired or short-term individual responses.
✓Explain a selection pressure as an environmental condition that can change survival or reproductive success.
✓Explain adaptation as population-level change across generations rather than intentional change within one individual.
✓Compare a controlled-variable model with a multi-variable model and explain why causal interpretation becomes harder when several factors change together.
✓Use trait-frequency data, survival/reproduction evidence and model limitations to evaluate competing explanations.
MISSION MEDIA · Amoeba Sisters
Natural Selection
Watch for inherited variation, selection pressure and population change across generations.
Captions are controlled inside the YouTube player. If the embed is unavailable, use the YouTube link.
LEARN
VARIATION → PRESSURE → REPRODUCTION → POPULATION CHANGE
Populations contain VARIATION. Some variation is inherited. When environmental conditions change, inherited variants can differ in survival or reproductive success. If individuals with one inherited variant leave more offspring, that variant may become more common over many generations. This is not an individual choosing or developing the trait it needs. Use VARIATION → PRESSURE → DIFFERENTIAL SURVIVAL/REPRODUCTION → INHERITANCE → POPULATION CHANGE. A graph of changing trait frequency shows WHAT changed; explaining WHY also requires evidence about conditions, survival, reproduction and alternative variables.
Populations contain VARIATION. Some variation is inherited. When environmental conditions change, inherited variants can differ in survival or reproductive success. If individuals with one inherited variant leave more offspring, that variant may become more common over many generations. This is not an individual choosing or developing the trait it needs. Use VARIATION → PRESSURE → DIFFERENTIAL SURVIVAL/REPRODUCTION → INHERITANCE → POPULATION CHANGE. A graph of changing trait frequency shows WHAT changed; explaining WHY also requires evidence about conditions, survival, reproduction and alternative variables.
LEARNING BUILD
Learn it. See it. Try it.
Look at the example. Check another point of view. Then try the task.
Step 1: Choose a starting clueWHAT YOU ALREADY KNOW
English / communication:Explain adaptation/evolution using evidence, causal chains, competing explanations and explicit model limits.
Maths / data:Compare datasets, percentage-point change, trends and interacting variables.
Topic knowledge:Inherited variation, selection pressures, differential survival/reproduction, adaptation and population change across generations.
This week’s first target:Distinguish inherited variation from acquired or short-term individual responses.
Which clue is a good place to start?
Choose a source that can directly support part of the investigation. More than one source may be useful, but start with evidence that does not outrun its support.
Need more help? See the teaching
TEACH 1 · CORE MODEL
Populations contain VARIATION. Some variation is inherited. When environmental conditions change, inherited variants can differ in survival or reproductive success. If individuals with one inherited variant leave more offspring, that variant may become more common over many generations. This is not an individual choosing or developing the trait it needs. Use VARIATION → PRESSURE → DIFFERENTIAL SURVIVAL/REPRODUCTION → INHERITANCE → POPULATION CHANGE. A graph of changing trait frequency shows WHAT changed; explaining WHY also requires evidence about conditions, survival, reproduction and alternative variables.
TEACH 2 · WHAT TO NOTICE
Distinguish inherited variation from acquired or short-term individual responses.Explain a selection pressure as an environmental condition that can change survival or reproductive success.
TEACH 3 · CONNECT + TRANSFER
Explain adaptation as population-level change across generations rather than intentional change within one individual. Compare a controlled-variable model with a multi-variable model and explain why causal interpretation becomes harder when several factors change together. Use trait-frequency data, survival/reproduction evidence and model limitations to evaluate competing explanations.
WORKED EXAMPLE · EVIDENCE
STARTING POPULATION
The fictional island model begins with 36% of the population carrying the deeper-bill trait and 64% the narrower-bill trait. The model assumes the variation is inherited.
Reasoning: Start with exactly what the source establishes. Connect it to the relevant concept, then stop before the claim becomes broader than the evidence. Now compare it with PURPOSE CLAIM: A fictional explanation says “the birds grew deeper bills because they knew they needed them”. This describes intention rather than inherited variation and differential reproduction.
Why caution still matters:This item is weak evidence for a broad conclusion: its claim or implication reaches beyond what the available support can establish.
WORKED EXAMPLE · MATHS / DATA ROUTE
The deeper-bill trait rises from 36% of the population in Generation 1 to 76% in Generation 6. What is the change in percentage points?
This week’s maths/data focus:Compare datasets, percentage-point change, trends and interacting variables.
Name the variable or relationship, keep the units visible, calculate or compare, then interpret the result as evidence about the system. A result can support an explanation without proving every possible cause.
Worked solution:Percentage-point change is direct subtraction: 76% − 36% = 40 percentage points.Answer check:40 percentage points. Now return the result to the question and state what it means in context.
WE DO · GUIDED PRACTICE
Which source needs the most caution before it is used to support a broad conclusion?
Choose any source whose claim outruns its support.
YOU TRY · INDEPENDENT PRACTICE
For Adapt or Change, explain one core idea, connect it to one named source or observation and one quantitative/data point from this page, then state an alternative explanation, trade-off or limitation that a strong judgement must consider.
Write at least 30 words. Name the evidence or data you are using and keep the claim inside what it can support.
MISCONCEPTION CHECK
PURPOSE CLAIM:A fictional explanation says “the birds grew deeper bills because they knew they needed them”. This describes intention rather than inherited variation and differential reproduction.
This item is weak evidence for a broad conclusion: its claim or implication reaches beyond what the available support can establish.
HELP
Try: “If ___ changes, the mechanism predicts ___. Evidence ___ supports/challenges that. An alternative explanation is ___. I would test ___ next.”
STRETCH · OPTIONAL
Build the strongest reasonable counter-argument or alternative explanation. Name one additional piece of evidence that could distinguish between the two positions.
EVOLUTION OBSERVATORY · POPULATION CONTROL⌁
ADAPT OR CHANGE
Change the environment. Watch the population — not the individual — respond.
Run two six-generation models, isolate one variable, then deliberately change several variables and audit what the evidence can and cannot show.
MECHANISM CHECK · POPULATION CHANGE
Which sequence best represents adaptation through natural selection?
SIMULATED ISLAND SEED-EATER POPULATION
Run six generations. The model starts with 36% of the deeper-bill trait.
Set rainfall NORMAL, seed HARDER and food NORMAL. Only seed hardness changes from the baseline conditions.
MULTI-VARIABLE RUN NOT LOGGED
Set rainfall DRIER, seed HARDER and food LOW. Several variables now change together.
The numbers are deterministic teaching-model outputs, not a prediction for a real species. Complete both required runs.
VARIABLE CONTROL AUDIT
Why is the multi-variable run harder to interpret?
MISCONCEPTION CHECK
The environment becomes drier. Which explanation avoids purpose-language?
EVIDENCE LIMIT
A graph shows the deeper-bill trait rising from 36% to 76%. What can that graph establish by itself?
Complete the mechanism check, log the controlled and multi-variable six-generation runs, then pass the variable-control, misconception and evidence-limit audits.
OPEN THE WEEK 2 EVIDENCE FILES
SOURCE 1
STARTING POPULATION
The fictional island model begins with 36% of the population carrying the deeper-bill trait and 64% the narrower-bill trait. The model assumes the variation is inherited.
SOURCE 2
CONTROLLED MODEL
When seed hardness is changed to harder while rainfall and food abundance remain at baseline settings, the deeper-bill trait increases across six simulated generations.
SOURCE 3
MULTI-VARIABLE MODEL
When rainfall, seed hardness and food abundance all change together, trait frequencies also change, but the result cannot isolate which variable produced each effect.
SOURCE 4
PURPOSE CLAIM
A fictional explanation says “the birds grew deeper bills because they knew they needed them”. This describes intention rather than inherited variation and differential reproduction.
SOURCE 5
MODEL LIMIT
The island seed-eater is a teaching simulation. Real populations are affected by many genetic, environmental, behavioural and chance processes not represented here.
INVESTIGATE + ENGLISH · EVIDENCE CASE
Populations change; individuals do not evolve on command
A population can contain inherited differences before the environment changes. If conditions shift, those differences may matter. In the Evolution Observatory model, a change in seed hardness can alter which inherited bill variants are more successful at feeding and reproducing. Across generations, this can change the proportion of each variant in the population. That does not mean an individual bird deliberately remodelled its bill because it needed to survive. It also does not mean one graph proves the whole causal story. Strong evolutionary reasoning connects environmental conditions with inherited variation, survival and reproduction, while checking whether other variables changed at the same time.
MAKE THE CALL
A simulated threatened population is declining and you can fund only one first intervention: habitat restoration, food-resource protection, predator control, breeding support or additional monitoring. Use the supplied evidence to justify a priority, explain one plausible alternative, and identify the evidence that could make you change your decision.
BUILD YOUR CASE CONCLUSION1. Make the call. 2. Use at least two relevant pieces of evidence. 3. Explain one limitation or uncertainty. 4. Finish with what can responsibly be concluded.Strong structure: My judgement is… The strongest evidence is… However, we still do not know… Therefore…
CASE CONCLUSION: Write 220–300 words explaining the six-generation population model. Describe the inherited variation, identify the selection pressure in the controlled run, explain how differential survival/reproduction could alter trait frequency, compare the controlled and multi-variable runs, and state at least one model limitation or piece of evidence still needed.
0/220 words minimum for this writing mission.
CLAIMEVIDENCELIMITATIONCONCLUSION
MATHS + DATA LAB
Check the numbers.
HOW TO SUCCEEDRead the situation first. Estimate what a sensible answer should look like, choose an efficient calculation, then use the feedback to check your reasoning.For data questions, explain what the number shows — and what it does not prove.
The deeper-bill trait rises from 36% of the population in Generation 1 to 76% in Generation 6. What is the change in percentage points?
Estimate first, then choose the answer.
MISSION 05 · MATHS + DATA LAB
DATA TRAINING
FRACTIONS + PERCENT · YEAR 8 EXTENSION
6 PROBLEMS
QUICK METHODFRACTIONS + PERCENT
Convert between fractions, decimals and percentages, then calculate from the whole.
GUIDED · Q01–Q03Use the quick method, then check the explanation.
Q01
What is 25% of 200?
25% of 200 = 0.25 × 200 = 50.
Q02
Which fraction equals 50%?
50% means 50 out of 100, which simplifies to 1/2.
Q03
0.25 as a percentage is…
Multiply a decimal by 100 to convert it to a percentage: 25%.
INDEPENDENT · Q04
Which is largest?
0.6 = 60%, which is larger than 55%, 50% and 45%.
INDEPENDENT · Q05
A $80 item is reduced by 25%. What is the discount?
25% is one quarter; one quarter of $80 is $20.
INDEPENDENT · Q06
After a 25% discount on $80, what is the new price?
$80 − $20 discount = $60.
OPTIONAL CHALLENGE · OPEN RESPONSE
A price rises 20%, then falls 20%. Is it back to the starting price? Explain with a numerical example.
0 words · optional
PROJECT HQ · TERM 3 · KEEP BUILDING
PROJECT HQ · PROJECT FILE 02
RESEARCH — identify scientific evidence needed.
Start something real. Build an idea, test it, improve it, and share it. Make your move.
MAP the dependencies in your chosen Resilient System. Define a baseline, choose one pressure variable, predict one direct and one secondary effect, then state what evidence would test your prediction.
WEEK 2 · INPUTS, OUTPUTS + PRESSURE · Define the baseline and pressure variable yourself, then predict both the direct effect and a possible secondary effect.
Complete all five fields. This Week 2 project map is saved on this device.
Project sharing will be optional. A future upload system must keep private submission separate from public-showcase/marketing permission.
CHECK-IN
What changed in your thinking?
20MASTER MODE
YEAR 8 · REMIX · TERM 3 / WEEK 2
FREEZE//SHATTER
Prioritise threats, freeze them and finish each target before the line breaks.
02LEARN
03INVESTIGATE
05DECIDE
07PROJECT
08CHECK-IN