For this one lab section we ran experiments to observe sublimation and learned about phase changes. We did these experiments so we could calculate how much bigger a solid becomes once it becomes a gas. It started with Andrew taking a big chunk of dry ice and showing us how it works. With the dry ice he broke in smaller pieces to give to us, we took a large beaker and filled it with water. Then took the piece of dry ice and broke it in even smaller pieces, and took one of those pieces and dropped it in the water. The result was smoke coming from the beaker that resulted by dropping dry ice in it, this is called sublimation. Finally when we put our dry ice into a balloon it showed us that the balloon was 8 1/2 centimeters We divided the diameter in two to find the radius, then imputed the information in the formula for volume of a sphere (4/3πr^3). And plugged it into the equation for the volume of a sphere I got the ratio 1: 321.555. Here are some pictures from the lab.
As the first experiment of the class we made oobleck. We observed the difference between a solid and a liquid. In the process we mixed the solid and liquid with, sugar, spice, and everything nice. As a group we all thought that it was a liquid so that's what we believed. The more we mixed it though the more we started to realize that it also has a solid shape. We realized that if you just stick your finger in the oobleck it starts to separate. But if you try and force yourself through the oobleck then it starts to take a solid shape and becomes solid. Towards the end of the experiment our table was 50/50 between whether it was a liquid or a solid. I believe that it is both and it's both and at times the matter in the oobleck can change.
Today we watched a interview between Steven Colbert and Neil Degrasse Tyson on science. Here is the link if you want to see it------> https://www.youtube.com/watch?v=YXh9RQCvxmg
As your first assignment, choose a quote from the video that strikes you, or causes you to stop and think.
For my quote I chose, "People don't like science because they don't understand it, science is all about trying to know, what you don't know." I chose this quote |
AuthorHello my name is Joshua Roberts, I am a 10th grade student at High Tech High. This is my chemistry blog where I will post all my work. Archives |