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?

1. carbon dioxide
2. oxygen
3. helium
4. hydrogen

Question 2 of 3

Extreme athletes known as freedivers practice what technique to temporary stop their breathing?

1. SCUBA
2. respiration
3. sleep apnea
4. static apnea

Question 3 of 3

What is something contestants normally do before participating in a breath holding contest?

1. stretch their muscles
2. breathe pure oxygen
3. drink lots of water
4. get a good night\'s sleep

Check your answers online at https://wonderopolis.org/wonder/How-Long-Can-You-Hold-Your-Breath-Underwater.