Lesson 2 of 84 · Engineering and Design
Experiment⭐ 30 XP🛠️ Engineer ShopVariables in Experiments
Engineering and Design.
🎯 Your mission
Set it up. Test it. Be amazed.
⚡ The twist
Every solution creates a new problem. That's good — that's the next project.
Mind = Blown
🚀 The Saturn V rocket burned 20 tons of fuel per second at liftoff.
Make a hypothesis first
Predict: which design will hold the most weight?
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
Materials Needed
- pennies
- plastic wrap
- cardboard
- tape
- scissors
Safety First
- Clean up spills immediately to prevent slipping.
- Use materials only as directed in the experiment.
- Keep small objects away from young children.
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
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.
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