The Lung Power Challenge: Measuring Vital Capacity
Ages 3–9
Q-bo's Answer
How much air can your lungs hold? Measure your 'Vital Capacity' and learn how your lungs deliver oxygen to your body.
📖 Explanation
🧒 For Ages 3-5 (Simple Words)
Your lungs are like two balloons inside your chest. Every time you breathe in, they fill up with air. Every time you breathe out, they empty. Let's see how BIG your balloons really are!
🎒 For Ages 6-9 (Scientific Explanation)
What is Vital Capacity?
Your lungs never fully empty—some air always stays inside. But Vital Capacity is the maximum amount of air you can breathe out in one go. Athletes tend to have a larger vital capacity because their lungs work harder during exercise. A typical child's vital capacity is around 1.5–2.5 liters.
Why Does It Matter?
Oxygen from the air crosses into your blood in tiny air sacs called alveoli. The more air you move, the more oxygen your muscles get. This is why training helps athletes breathe more efficiently.
🧪 Measuring Your Breath
~15 minUse a spirometer to measure how many liters of air you can exhale in one go.
🛒 Supplies
📋 Steps
- 1
😮💨 Deep Breath
Take the deepest breath possible, filling your lungs to the brim.
- 2
🌬️ Exhale Fully
Blow all the air into the spirometer tube until your lungs are empty. Read the scale!
Watch the Video
Lung capacity BodyWorks science experiment
The Lung Power Challenge: Measuring Vital Capacity