Rapid Change: Boiling — Reading Comprehension

Boiling is a fast and exciting way that a liquid, like water, changes into a gas. This process happens when a liquid gets hot enough to reach its boiling point. The boiling point is the exact temperature where the liquid starts to change quickly into a gas. For water, this is 100 degrees Celsius, or 212 degrees Fahrenheit.

During boiling, heat energy makes the particles in the liquid move faster and faster. When the temperature reaches the boiling point, the particles have enough energy to break free from the liquid and become a gas. This is why you see bubbles forming and rising to the surface when water boils. The bubbles are made up of water vapor, which is water in its gaseous state.

Boiling is different from evaporation. Both turn a liquid into a gas, but evaporation is slow and can happen at any temperature, while boiling is fast and only happens at the boiling point. You can see boiling when you cook pasta or make tea. In factories, boiling is used to clean water by killing germs.

Boiling is also important in nature. When the sun heats up rivers, lakes, or oceans, some water can boil and turn into vapor, becoming part of the water cycle. This vapor rises into the air and later forms clouds through condensation.

Some liquids boil at lower or higher temperatures than water. For example, alcohol boils at a lower temperature. Knowing the boiling point helps scientists and cooks work safely and better understand the world around us.

Interesting Fact: The boiling point of water changes at higher places, like mountains. Water boils at a lower temperature there because there is less air pressure!

What is boiling?

What is the boiling point of water?

What are boiling bubbles made of?

What happens to particles during boiling?

How is boiling different from evaporation?

Why does water boil at lower temperature on mountains?

Boiling is a slow change. True or False?

What is the 'water cycle'?