Air Under Snow

When snow buries someone, the air around their face is trapped in a small pocket. That air is not replaced, so oxygen runs out and carbon dioxide builds up.

This picture is part of the full library

Every lesson is open to everyone for 7 days after it is published. This one came out on September 13, 2026: its text stays readable here, and its picture opens with a subscription.

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Age 12: open this week

In the picture

1. The person’s cheek.
2. The clear bubble around the face.
3. A blue dot inside the bubble.
4. A grey dot inside the bubble.

Examples

A plastic bag over your head traps air.
Holding your breath under a blanket.

Key takeaways

Trapped air runs out of oxygen.
Carbon dioxide builds up when you breathe.

Carry on in the app

Three questions on this lesson. It has left the free week, so its quiz is for subscribers.

At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.

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