# Science: Heat & Temperature

This year in school we are using Layers of Learning year 4. The first two weeks of school we did unit 1. Our science topic was heat and temperature.

We learned about the three temperature scales and where they came from, Fahrenheit, Celsius, and Kelvin.

We recorded the temperature of water as it boiled every 30 seconds for ten minutes. We learned that once it starts heating up it heats up rapidly and then as it gets closer to boiling it levels off. We also learned that our tap water boils at 216*F.

We measured the diameter (more or less) of a balloon at room temperature, after being submerged in ice water for a minute and a half, and after being submerged in very hot water for a minute and a half. We recorded the temperature of the air, ice water, and hot water in celsius and changed it to Kelvin. Then we figured out the volume of our sphere(ish) balloon at each temperature. We compared the volumes divided by the temperatures and found that they were close to equal no matter the temperature. The math wasn’t exactly right because measuring the diameter of the balloon wasn’t exactly right either.

We took the temperature of our hands and then rubbed them briskly together and then took their temperature again. The temperature increased because we added energy by rubbing them together.

We put a small glass of hot water dyed with red food coloring and covered in aluminum foil in a larger container of cold water. We poked a hole in the foil and then watched as the dyed hot water came up and out of the hole to mix with the cold water.

We made a convection current by heating up water mixed with food coloring and dish soap very slowly. Once it got almost to boiling we watched as the hot water on the bottom lifted up and then went back down as it cooled.

We chilled a container of water and a container of air. They were the same temperature. We touched both at one time and all agreed the water felt colder because it’s a better conductor.