Lesson 24 of 84 · Engineering and Design
Lesson⭐ 30 XP🛠️ Engineer ShopVariables in Experiments (Part 2)
Engineering and Design.
🎯 Your mission
Master the concept. Use it tomorrow.
⚡ The twist
The first design always fails. That's the point.
Mind = Blown
🛠️ The first computer bug was a literal moth stuck inside a machine in 1947.
Make a hypothesis first
Guess: what's the weakest part of this build?
What You'll Learn
Variables in experiments include the independent variable (what you change), dependent variable (what you measure), and controlled variables (what you keep the same).
Key Words
- hypothesis
- variable
- experiment
Steps
Look at the vocabulary words and write a definition for each in your own words.
Build a water filter using a bottle, sand, gravel, cotton, and charcoal. Pour muddy water through and measure how clear the output is.
Watch carefully for any changes and note the time.
Create a data table to organize your measurements.
Check Your Understanding
Question 1
1 of 3What is a hypothesis?
Where you see this in real life
Every bridge, building, and gadget you've ever used started with this.
Stretch Challenge
Try this in real life this week.
Find something that's broken at home and try to figure out *why* it broke.
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.
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