Lesson 83 of 84 · Trade and Commerce
⭐ 30 XP⚓ Market PortTrade Routes Through History
Opportunity cost is what you give up when making a choice.
🎯 Your mission
Spot the cost behind the price.
⚡ The twist
Trade isn't just stuff — it's ideas, words, and germs.
Mind = Blown
🤯 The first stock exchange was in Amsterdam in 1602 — for spices.
Then & Now
💱 This is happening in your local store every single day.
Opportunity cost is what you give up when making a choice. Spending your allowance on a book means you cannot also buy a toy. Every decision involves trade-offs.
Key Facts
Supply and demand affect prices.
Trade connects people globally.
Every choice has an opportunity cost.
Check Your Understanding
Question 1
1 of 2What are goods?
Why this still matters
The next time you spend $1, ask: who else benefited besides you?
Stretch Challenge
Try this in real life this week.
Find two products that look similar but cost very different. Why?
For the dinner table
“If you had $20 to start a business, what would you sell?”
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