WONDER #310: How Long Can You Hold Your Breath Underwater?
Question 1 of 3
When you hold your breath, what builds up inside your body?
- carbon dioxide
Question 2 of 3
Extreme athletes known as freedivers practice what technique to temporary stop their breathing?
- sleep apnea
- static apnea
Question 3 of 3
What is something contestants normally do before participating in a breath holding contest?
- stretch their muscles
- breathe pure oxygen
- drink lots of water
- get a good night\'s sleep
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