WONDER #1772: Why Does Water Bubble When It Boils?

Question 1 of 3

As a general rule, water boils at what temperature?

1. 100º F
2. 212º F
3. 1,000º F
4. 2,120º F

Question 2 of 3

When water boils, the bubbles are made of what?

1. air
2. water vapor
3. hydrogen
4. oxygen

Question 3 of 3

Bubbles that first appear when you pour water into a pan and begin to heat it are usually made up of what?

1. air
2. water vapor
3. hydrogen
4. oxygen

Check your answers online at https://www.wonderopolis.org/wonder/why-does-water-bubble-when-it-boils.