Rainbow in a Jar
We made our own rainbow in a jar and created a scientific illustration for our experiment.
We began by using the scientific method. Our topic was "Density" and our question was "Which liquid will be the most dense and which will be the least dense." We conducted background research on our topic by reading a book about density.
We learned that density was how closely packed the particles in a liquid or object are. If there are more particles closely packed together than that object is more dense. We illustrated this by comparing groups of students and figuring out which group was more dense.
The group with more kids was more dense. They were more closely packed together. We discussed how this was like living in the city vs. the country and how that is called "population density".
After learning about density we constructed our hypothesis. We decided that based on our research the liquid that had more closely packed particles would be on the bottom and the least dense liquid would be on the top. We looked at the different liquids we were using, including corn syrup, rubbing alcohol, water, olive oil, and dish soap. We saw the the corn syrup stuck to the glass and looked the thickest so we hypothesized that it would be the most dense. We put in the different ingredients and created a rainbow in a jar. We then drew and labeled scientific drawings as a way to publish our results.
After learning about density we constructed our hypothesis. We decided that based on our research the liquid that had more closely packed particles would be on the bottom and the least dense liquid would be on the top. We looked at the different liquids we were using, including corn syrup, rubbing alcohol, water, olive oil, and dish soap. We saw the the corn syrup stuck to the glass and looked the thickest so we hypothesized that it would be the most dense. We put in the different ingredients and created a rainbow in a jar. We then drew and labeled scientific drawings as a way to publish our results.