Scarcity means that resources (time, money, materials, etc.) are limited while our wants are unlimited. Imagine you have only 10 minutes to finish a homework assignment and 5 minutes to play a game. You must decide how to use your time.
Because of scarcity, we must choose between alternatives. Every choice involves a trade‑off: giving up one thing to get another.
The opportunity cost is the value of the next best alternative that you give up.
Mathematically: \$OC = \text{Value of best forgone alternative}\$
| Activity | Opportunity Cost |
|---|---|
| Study for exam | Play video game for 1 hour |
| Play video game | Study for exam for 1 hour |
Suppose you have a pizza that can be cut into 8 slices. You can either eat 4 slices now or save them for later. If you eat 4 slices now, the opportunity cost is the enjoyment you would have had from eating the remaining 4 slices later.
Understanding scarcity, choice and opportunity cost helps you make better decisions in school, at home and later in life. It teaches you to think about what you give up when you choose one option over another.