Question - Is Oobleck solid or liquid
I’d say that Oobleck is both because when the cornstarch particles mash together with the water particles, they pack together but when you release pressure, they split up and become a liquid.
Hypothesis: (what you think will happen)
Before, I thought the cornstarch and the water would mix and create just some thick version of water. It does make sense now on how it works because pressure will mash stuff up. If you got two pieces of playdoh and you mash it together, it becomes one piece of playdoh, its kinda like that in a way.
Materials: water and cornstarch (food coloring if you want), a bowl and a cup and also a spoon.
Step- by- Step Procedure
First, add one cup of water into the bowl. And then kinda slowly start adding 1.5 cups of cornstarch
Next, start mixing with a spoon at first but shortly after start using your hands.
Then, keep adding cornstarch until it gets thick and gooey.
Last, if it went well, put the oobleck in plastic if you want to keep it in your pocket! If it turned to liquid you did something wrong!
Observations;
This is what Oobleck looks like:
(it’s wrapped in plastic). -----------^
These are the tests you carried out you must answer each question with a minimum of 2 sentences (more would be better).
- How did it behave when you slapped it?
It was pretty painful because it turned hard. It kinda felt like a rock was soft. Does that make sense?
- What happened when you placed a blob of oobleck on the table and poked it after a minute? How did it behave?
When I poked it a let go, I left a hole in the blob, then it turned back into a liquid and slowly filled the hole back up.
- What happened when you dipped your finger into the oobleck and slowly moved them around the bowl?
The pressure of my fingers made it sink and then it was stuck, it was very hard to move around.
- What happened if you moved them faster?
It would move, slowly… it just kind of stuck to my fingers so I was just pulling oobleck out of the bowl.
- What happened when you threw an oobleck ball in the air? (Did it retain its shape or not?)
It didn’t really, the time that it was in the air gave it a little bit of time to start moving but I think the fall mashed it together again.
- When you pushed it how did it react?
It just puffed back up, but when it got up it started to melt because there was no pressure on it anymore.
- When you picked it up, did it all come up?
No. only a bit of it that stuck to my fingers was the part that came out.
- What happened when you poured it?
It slowly dripped down and then it started to fall and IT WAS SO SATISFYING!
- What happens with the shape of it?
You can mold it, but when you are finished it will probably melt so I don’t think you should waste your time molding oobleck.
Analyze Your Observations:
Before I thought that Oobleck was a solid and a liquid and in a way I was right but I was also wrong. It is a non-newtonian fluid, a material of a liquid solid and a liquid combined, when it gets pressure on it the molecules mash into a solid and then turns back into a liquid.
What is your conclusion? (result)
In conclusion the non-newtonian fluid known as Oobleck has a very interesting way on how its molecules work, I strongly recommend making some Oobleck so you can see how fun it is! Also… IT GETS EVERYWHERE!!!
