This was the first lab we did this year. It was to get us used to the lab and working with different chemicals and learning how to use them. This lab wasn't dangerous in any way, but was still engaging and left us all with questions.
At the beginning of this lab we took some notes during a small lecture about the phases of matter and how it worked. Also the directions for the lab we are about to do.
The purpose of this lab was to better understand what a liquid and a solid are and the different phases of matter.
We worked in table groups and during this lab we mixed cornstarch and water at the ratio of 3:1 to make Oobleck. When cornstarch is mixed with water it turns into a substance that seems like a liquid and solid at the same time. When you pick the Oobleck up or put pressure on it is harder and seems like a solid, but as soon as you let go it turns drippy and runny again, back into a liquid. I experimented a few times trying different amounts of pressure and I found out that when you put too much pressure it turns crumbly and falls into little pieces. My group and I deicided to dump it out onto the table and see how it would work on there. I spend itself out to about 1/2 centimeters thick and stopped growing, almost like it was a solid again.
After doing all these different experiments with the Oobleck it lead me to believe that Oobleck is both a solid and a liquid. I found out that when you apply more pressure to the Oobleck it turns into a solid. When there is not as much pressure the Oobleck is a liquid. I think this happens because when pressure is applied the molecules are compressed together making a solid. And when there is not as much pressure the molecules can slide past each-other making it a liquid.
Overall, I learned that things like Oobleck can be both a liquid and solid and how different things can affect how something is a solid or a liquid or even a gas.
At the beginning of this lab we took some notes during a small lecture about the phases of matter and how it worked. Also the directions for the lab we are about to do.
The purpose of this lab was to better understand what a liquid and a solid are and the different phases of matter.
We worked in table groups and during this lab we mixed cornstarch and water at the ratio of 3:1 to make Oobleck. When cornstarch is mixed with water it turns into a substance that seems like a liquid and solid at the same time. When you pick the Oobleck up or put pressure on it is harder and seems like a solid, but as soon as you let go it turns drippy and runny again, back into a liquid. I experimented a few times trying different amounts of pressure and I found out that when you put too much pressure it turns crumbly and falls into little pieces. My group and I deicided to dump it out onto the table and see how it would work on there. I spend itself out to about 1/2 centimeters thick and stopped growing, almost like it was a solid again.
After doing all these different experiments with the Oobleck it lead me to believe that Oobleck is both a solid and a liquid. I found out that when you apply more pressure to the Oobleck it turns into a solid. When there is not as much pressure the Oobleck is a liquid. I think this happens because when pressure is applied the molecules are compressed together making a solid. And when there is not as much pressure the molecules can slide past each-other making it a liquid.
Overall, I learned that things like Oobleck can be both a liquid and solid and how different things can affect how something is a solid or a liquid or even a gas.