Lesson 6 of 6 · Engineering and Design

Experiment⭐ 30 XP🛠️ Engineer Shop

When Two Groups Disagree

🧪Lab Brief #6

Engineering and Design.

🎯 Your mission

Predict it first. Then prove yourself right (or wrong).

⚡ The twist

The first design always fails. That's the point.

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Mind = Blown

🛠️ The first computer bug was a literal moth stuck inside a machine in 1947.

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Make a hypothesis first

Guess: what's the weakest part of this build?

What You'll Learn

If two groups get different answers to the same question, one may have made a mistake — or the two may have measured slightly different things. Comparing methods line by line usually finds the reason faster than repeating the experiment.

Key Words

Tap a word to see its definition.

Materials Needed

class results
notebook

Safety First

Have an adult check your set-up before you start, and tidy everything away afterwards.

Steps

Step 1 — Read

Read the explanation above and note the two key terms before you start.

Step 2 — Do

Compare your class's results for one experiment and pick the two groups furthest apart. Read both methods side by side, find the step where they differ, and test whether that step explains the gap.

Step 3 — Observe

Record what actually happened, including anything that did not match what you expected.

Step 4 — Record

Write a conclusion that answers the question this lesson opened with, and state your uncertainty.

Check Your Understanding

Question 1

1 of 2

When two groups disagree, the first thing to compare is the:

How sure are you going to be?😐 maybe

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Where you see this in real life

Every bridge, building, and gadget you've ever used started with this.

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Stretch Challenge

Try this in real life this week.

Find something that's broken at home and try to figure out *why* it broke.

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For the dinner table

“What's something around the house you'd redesign — and how?”

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Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

🌡️Share card

Share this experiment

Send it to a parent who's looking for a 10-minute kitchen science win.

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