Environmental science for high school: study cards over three tiers, the tricky ones, a practice quiz at three levels — Foundation, On-Level, and Challenge — and a lab where you annotate the EPA's 2009 endangerment finding into evidence, mechanism and conclusion, graph sixty years of world grain against population, sort twelve resources renewable or nonrenewable by the rate they are used, and argue from the numbers whether the 1990 sulfur cap worked. Work here, or print it and use a pencil — both count.
A forest regrows a certain amount each year. That rate is the only income this resource has.
“Renewable” is not a property of the resource — it is a statement about the RATE you use it at. A forest cut faster than it regrows is being mined, and groundwater pumped faster than it recharges is too.
What people get wrong
⚠️People often think…
Ozone is a pollutant, so more ozone is always worse.
Same molecule, opposite verdicts depending on altitude. At ground level it damages lungs and crops. In the stratosphere it blocks UV and we need it. Location decides, not the formula.
Bad at the ground, good up high.
⚠️People often think…
Population growth is the main driver of environmental impact today.
Global growth is now under 1% a year and still slowing. The lever that has kept climbing is CONSUMPTION per person — which is also the one policy can actually reach.
Consumption per person is the moving number.
⚠️People often think…
Solar and wind are still too expensive to matter.
Costs fell far enough that in most places they are now the cheapest new generation to build. Their real problem is timing — the sun sets and the wind stops — which is a storage and grid question, not a price one.
The problem is the clock, not the price.
⚠️People often think…
Plastic’s environmental problem is its carbon footprint.
Its defining problem is PERSISTENCE — it does not break down for centuries. A life-cycle analysis has to count the right impact for the right material, or you end up swapping one product for another that is worse in the way that actually matters.
Count the right impact for the material.
Withdrawals, footprints, fixes, rules
1Watch one
Fertilizer from a thousand farms pollutes a river. Why is that harder to fix than a factory pipe?
A factory pipe is a POINT source — one place, one owner, one permit.
A thousand fields are a NONPOINT source — no single outlet to measure or cap.
You cannot put a meter on rain running off a field.
So the tool changes: point sources you regulate, nonpoint sources you persuade and subsidize. ✓
2Do one with me
Fill in what the evidence shows.
Whether a resource is renewable depends on the
Ozone in the stratosphere is
A source with no single outlet is called
💬One sentence, then you move on
Why can the same resource be renewable in one place and not another?
3Try one
Name the real obstacle for solar and wind today.
I want a hint first
A solar panel produces nothing at 9 p.m. What would you need to use its power then?
💬Last one — then you're done here
Why does a point source get a rule and a nonpoint source get a program?
Where this goes
Where this lives
Reading a utility’s energy mix, understanding why a recycling rule targets one material and not another, arguing about a local water restriction with the actual numbers.
What this feeds
Next is the capstone — arguing any of this from evidence you can defend.
Name one resource near you that is used faster than it refills.
One card at a time — tap “Show me” to check yourself, then Next. Start at Foundation; when those feel easy, climb.
Helpful Hints
🪜 Environmental science — the ladder
Every resource is a withdrawal from one of Earth’s four spheres → renewable if it regrows faster than we take it; nonrenewable if it doesn’t → impact = population × consumption per person × technology, and population growth is slowing while consumption rises → fossil fuels are dense and cheap and leave carbon; solar and wind are cheap and clean and intermittent → air, water, soil and species each have measured damage and measured fixes → the tragedy of the commons is why shared resources need rules → the rule works when the tool matches the source, and a finding is judged by checking its evidence, mechanism and conclusion one at a time.
Withdrawals, footprints, fixes, rules — and the data behind each.
🤝 The whole idea
This subject is where the debates live, so the habit that matters most is asking for the number: how much, compared with what, measured how. Every position in this unit comes with one.
Ask for the number.
⚠️ Tricky ones
“Renewable” is about the RATE. A forest cut faster than it regrows is being mined.
Population is not the main lever anymore — growth is under 1% and slowing. CONSUMPTION per person is.
Solar and wind are now CHEAP. Their problem is the clock and the calendar, not the price.
Ozone: bad at the ground, good in the stratosphere. Same molecule.
A point source you regulate; a nonpoint source you persuade. The tool follows the geometry.
“Rules never work” is refuted by three measured cases: 78% (criteria pollutants), 90% (sulfur), a closing ozone hole.
Life-cycle: count mining to disposal, and count the RIGHT impact — plastic’s problem is persistence, not carbon.
⚡ Energy sources — the chart
Source
Renewable?
Carbon to run
On demand?
The catch
coal
no
highest
yes
CO₂, particulates, mining
natural gas
no
about half of coal
yes
methane leaks; still fossil
nuclear
no
near zero
yes, steady
waste, cost, build time
hydro
yes
near zero
yes
dams flood valleys; few sites left
wind
yes
zero
no
intermittent; needs land or sea
solar
yes
zero
no
night, winter, clouds; storage
geothermal
yes
near zero
yes, steady
only where the crust is hot
Nothing is free: pick the column you can live with.
🎯 How the test will ask
A graph of population and a resource over decades — “describe the trend and what it implies.”
“Classify these sources as renewable or nonrenewable and justify the borderline ones.”
“Explain the tragedy of the commons with an example, and propose a fix.”
A short policy text — “identify the claim, the evidence and the mechanism.”
“Compare two energy sources on carbon, reliability and one other impact.”
“Evaluate a proposed regulation: which tool, which source, what would you measure to know it worked?”
✅ Can you…
Say whether a resource is renewable by its rate, not its name?
Use impact = population × consumption × technology on a real comparison?
Compare energy sources across all five columns of the chart?
Explain the commons and name the rule that solves it?
Cite three regulations that worked, with the number for each?
Break a finding into evidence, mechanism and conclusion and check each?
Pick your level
Look back at anything you missed — the hint that appeared is exactly what to reread tonight.
How sure did you feel?
Lab
Work like a scientist: label the diagrams, turn the table into a graph, then write a claim with evidence and reasoning. Every lab checks itself on the spot, and hints are free.
Your practice never leaves this device. There is no account and no sign-in. Your work is saved in this browser only, and you can erase it whenever you want.
Your practice record — saved on this device
This is your record of the module on screen — it stays here and goes nowhere. Independent means you got it right on the first tap; supported means you got it after the explain-and-retry, or marked ‘I had it’ on a revealed answer. Both count, and neither is a grade. If your teacher asks, copy the row or show them this screen.
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Explained in own words
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The answer key is for a teacher: it prints only from here, for the unit on screen. Print the study packet prints the study pages and a blank quiz — never the answers.