Lesson 3 of 5 · Engineering and Design
Lesson⭐ 30 XP🛠️ Engineer ShopReading a Sustainability Trade-off
Engineering and Design.
🎯 Your mission
Learn the rule. Then catch nature using it.
⚡ The twist
Constraints make you more creative, not less.
Mind = Blown
🌉 The Eiffel Tower can grow 6 inches taller in summer because metal expands when hot.
Make a hypothesis first
Before you test: how many tries until it works?
What You'll Learn
Almost every environmental choice trades one harm against another. Biofuel cuts fossil carbon but competes with food crops for land; hydroelectricity is clean to run but floods valleys. Naming the trade-off is the analysis.
Key Words
Tap a word to see its definition.
Steps
Read the explanation above and note the two key terms before you start.
Take three green technologies and, for each, write the benefit, the trade-off and one group of people affected. Then rank them for a country with lots of land but little water.
Record what actually happened, including anything that did not match what you expected.
Write a conclusion that answers the question this lesson opened with, and state your uncertainty.
Check Your Understanding
Question 1
1 of 2Growing biofuel crops competes most directly with:
Where you see this in real life
Your phone, your bike, your shoes — all designed with this idea.
Stretch Challenge
Try this in real life this week.
Build something — anything — out of stuff in your recycling bin.
For the dinner table
“What's something around the house you'd redesign — and how?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Ready?
Reading a Sustainability Trade-off
Learn the rule. Then catch nature using it.
Full screen — no distractions
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