Lesson 10 of 10 · Data and Evidence
Lesson⭐ 30 XPEstimating to Check an Answer
Data and Evidence.
🎯 Your mission
Master the concept. Use it tomorrow.
⚡ The twist
Nature loves to surprise the careful watcher.
Mind = Blown
🔬 The more you look, the more nature shows you.
Make a hypothesis first
Before you start: write down what you think will happen, and why.
What You'll Learn
Before trusting a calculated result, estimate it roughly in your head. If the calculator says a person's mass is 7,000 kg, the arithmetic is wrong, and a five-second estimate catches what a careful recalculation might not.
Key Words
Tap a word to see its definition.
Steps
Read the explanation above and note the two key terms before you start.
Estimate five quantities to the nearest power of ten before calculating them — the mass of a full backpack, the number of breaths you take in a day, the litres in a bath. Compare each estimate with the calculation.
Record what actually happened, including anything that did not match what you expected.
Write a conclusion that answers the question this lesson opened with, and state your uncertainty.
Check Your Understanding
Question 1
1 of 2A sanity check is used to:
Where you see this in real life
This shows up in your everyday life more than you'd think.
Stretch Challenge
Try this in real life this week.
Try one experiment in real life this week — even a tiny one.
For the dinner table
“What's the most surprising thing you learned today?”
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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Estimating to Check an Answer
Master the concept. Use it tomorrow.
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