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Boiling Point

Boiling Point is the temperature at which a liquid turns into gas and forms bubbles.

Think of it this way

A pot of water sits on a hot burner. As the water heats up, small bubbles form at the bottom and rise to the top. At a set heat level — the boiling point — bubbles form fast and the whole surface churns. Below that level, the water stays calm no matter how long you wait.

Explaining boiling point by grade level

When you heat water on a stove, it gets hotter and hotter. At some point, big bubbles start to form and rise. That is when the water has reached its boiling point. On a tall mountain, the water starts to bubble at a lower heat.

Projects that explore boiling point

Boiling Point and Altitude

Water turns into gas and forms bubbles at exactly 100°C — but only under normal conditions. You test four variables: water amount, heater type, room temperature, and building floor level. Most conditions give the same result. Only on the 50th floor does the reading change, dropping to 99.5°C. As a result, lower air pressure turns out to be the one factor that actually shifts the boiling point.

Hard