A CIESE Collaborative Project

# Spring 1999 Student Reports

## Ocean City Intermediate School

#### Ocean City, New Jersey, USA

When we began this projet we wanted to know what the variable was that caused a change in the temperature at which water boiled. And after running a few tests, we discovered that it was the elevation we were at. That made the most significant difference in the temperature water boils. Elevation makes a difference because the higher up you are, the less air pressure there is, and water can boil sooner if you are farther from sea level where there is less pressure.

In this project we learned about how pressure gets weaker as you go higher and higher above sea level.Also it gets stronger as you go farther and farther below sea level. So that taught us that the elevation changed the boiling point and we found out that our hypothesis was correct. The elevation changes the boiling point because if you go higher up the bubbles in the water don't need as much pressure to make it steam or boil.

In conclusion, we think this project was extremely productive. It kept us interested in what we were doing, and we learned numerous things about the subject we were studying. We also found this project quite entertaining. We got to do labs, which we enormously enjoy doing. Also, these labs made our science homework much more clear to us. Therefore, we were able to do our Science homework quickly without losing accuracy. We think this boiling point project was one of the best projects we did all year so far.

## Ayersville Middle School

#### Defiance, Ohio, USA

Our class hypothesis for the International Boiling Point project was that the heating device would affect the boiling point of water. After conducting the experiments and comparing our data with the other participants, we discovered our hypothesis was wrong. Instead of heat affecting the boiling point of water, our final conclusion was that elevation affects the boiling point of water. We think this because the higher elevation you are, the less air pressure. The weaker the pressure is, the water starts boiling sooner than at the lower levels. The closer to sea level you are, the more pressure there is, and the stronger it is, making the water take longer to boil. It was difficult for us to find what the effect of the boiling point of water was. The reason for this was because of the limited amount of data from the experiments. After studying the charts we made, we narrowed down our choices to two effects -- the room temperature or elevation. Next we did research and compared our results with the others. If more participants had performed the experiment, it would have been easier to see what affected the boiling point. With a lot more data, or even barely any at all, wouldn't have mattered because my classmates and I have learned a lot and have had fun.