How To Make Oobleck? - CLT Livre

How To Make Oobleck?

How To Make Oobleck

What is the formula for oobleck?

Oobleck Ingredients & Equipment – You really only need two ingredients to make this oobleck recipe — cornstarch and water! The simplest mixture to begin with is 1 1/2 cups of cornstarch mixed with 1 cup of water. If you want to add color, I recommend using versus food coloring to prevent any staining.

What is so unique about oobleck?

Unusual fluid – Oobleck is a non-Newtonian fluid, a term for fluids that change viscosity (how easily they flow) under stress. When you run your fingers slowly through cornstarch and water, it acts like a liquid, but apply rapid force, and it solidifies, bends and even tears.

  1. It really is like a liquid if you move it slowly, but it does everything you expect of a solid if you play with it quickly,” Kamrin said.
  2. After seeing a scientific talk about oobleck’s properties, Kamrin and his colleagues launched a “very healthy” internal debate over how cornstarch and water might differ from other wet, granular materials.

The scientist and his team typically focus on the flow of sand, gravel and other industrial materials. But cornstarch is different, he said, largely because the particles are so tiny. Cornstarch particles are a micron to 10 microns in size, smaller than the diameter of a human hair.

At this size, particles are susceptible to the tiniest of thermal and electric forces, Kamrin said. As a result, cornstarch particles in water actually repel each other slightly, held apart by forces too weak to impact something as large as a grain of sand. This repulsive force helps the slurry flow, as the particles prefer a layer of fluid between then.

But when squeezed together, friction takes over and the particles move like a solid.

Can u eat oobleck?

What is oobleck? – How does oobleck work? It’s all to do with the particle size and how these interact with water. Cornflour (known as cornstarch in the US) has a very small, fine texture and when mixed with water, the starch particles suspend rather than dissolve. When oobleck is still or stirred slowly, the water surrounding each starch particle allows the mixture to flow smoothly.

However, when pressure is suddenly added – such as the surface of the oobleck being struck by a spoon or the mixture being squeezed – the starch particles compress together, temporarily pushing the water out of the suspension and making the mixture behave like a solid. Try getting kids to tap their fingers over the surface, then let their finger slowly sink into the mixture to see the difference.

Making our oobleck recipe only requires cornflour and water. You can add food colouring if you like, but it’s not essential, so don’t worry if there’s none in your pantry. Oobleck is technically edible, but it won’t taste good! It’s safe for children of all ages to play with and is a great introduction to the world of slime-making,

Is oobleck the same as slime?

That version of slime is also a non-Newtonian fluid with similar properties to oobleck. The difference is that oobleck tends to be more liquid like and doesn’t last long (it will mold) and glue slime tends to be more solid and can last indefinitely in an air tight plastic containers.

Why is slime called oobleck?

What is oobleck slime? – Kids ask such great questions when it comes to oobleck slime like, is oobleck a solid or a liquid? Or, what state of matter is oobleck? Oobleck liquid is a combination of water and cornstarch. It was named after a Dr. Seuss book called, Bartholomew and the Oobleck, where a gooey green substance called Oobleck falls from the sky and causes chaos in the kingdom! Oobleck slime is a non-Newtonian fluid, which means that its viscosity, or flow behavior, changes even at the same temperature.

It begins as a runny goo until you apply pressure or stress to it. Then suddenly, it behaves like a solid. This is different from water, a Newtonian fluid, which has a constant flow unless the temperature changes. Then it turns into ice or gas! As long as you keep the pressure applied to Oobleck liquid, you can roll it into a solid ball, slam it hard without a splash, and even run across it without sinking! But be careful because as soon as you release the pressure, oobleck turns back into a liquid and will fall through your fingers, relax back into a container, and — if you stand still long enough — make you sink! Try this fun thought experiment with your kiddos: What would it be like if all liquids behaved like non-Newtonian fluids? Can you imagine a river that flowed like Oobleck? Or an ocean that could be walked on really fast without sinking? Another fun property of oobleck slime is that it’s a shear thickening liquid, which means that if you shear it — or cut it quickly with your fingers like a knife — it will thicken.

Blood, on the other hand, is a shear thinning liquid. If you put pressure on it or cut it, it thins! This makes it easier for it to flow through our veins even with extra pressure or a clog. You can show your kids this great video by Crash Course Kids to teach them more about Oobleck and non-Newtonian fluids.

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Is oobleck a chemical?

Oobleck is really interesting. It is a liquid that is also a solid. I chose this as my because a liquid that at the same time is a solid, how does it not sound cool. Oobleck allows me, and other people, to experience a non-newtonian fluid. Composition of,

  • With only two ingredients in oobleck, all we need to know is the chemical equations of them.
  • The chemical equation of water is H2O, and for cornstarch it is C27H48O20 Main Chemicals, Compounds, Components There is only two main components in oobleck, water and cornstarch.
  • Water is the first component in oobleck.

Water is a liquid that everybody on Earth drink, and water is the liquid part of oobleck. It can be found pretty much everywhere. Cornstarch is the second component in oobleck. Cornstarch is starch that is derived from corn grain or wheat. The starch is obtained from the endosperm of the kernel.

  • This is the component that turns the water into oobleck.
  • You can find cornstarch in any grocery store.
  • Chemistry’s Role Water is made by combining two hydrogen atoms with one oxygen atom, this makes one water atom.
  • Cornstarch is obtained from the endosperm of the kernel from cornmeal, or wheat.
  • If you combine 27 carbon atoms, 48 Hydrogen atoms, and 20 oxygen atoms you get one cornstarch atom.

Oobleck is man-made. The chemistry that is involved when you make oobleck is when you mix the water with the cornstarch, it is kind of turned into a quicksand. When you slowly dip your hand in oobleck, it will sink. If you apply any kind of fast pressure to it, (slapping it, for example), the cornstarch packs together and turns into a solid.

  • Background Research There is really only two components in oobleck, water and cornstarch.
  • The main chemical reaction that is involved is when you hit oobleck.
  • The substance turns from a liquid into a solid.
  • Oobleck is a non-newtonian fluid.
  • A non-newtonian fluid is a fluid way that does not follow Newton’s Law of Viscosity.

Resources https://en.wikipedia.org/wiki/Non-Newtonian_fluid#Oobleck This site describes that oobleck is a non-newtonian fluid, and says what a non-newtonian fluid is. http://www.oobleq.com/history.html This site tells you the history of oobleck. http://imaginationstationtoledo.org/educator/activities/oobleck This site tells you the instructions on how to make oobleck.

Is oobleck a solid or liquid?

It’s a Solid It’s a Liquid It’s Oobleck! Oobleck is a non-Newtonian fluid; it has properties of both liquids and solids. You can slowly dip your hand into it like a liquid, but if you squeeze the oobleck or punch it, it will feel solid. Ages 5-7 (great for families to do together) Materials Needed:

Mixing bowl Corn starch Water Food coloring (optional)

Instructors: Amanda Royce & Caitlin Wollack This is a pre-recorded video with instructions on how to make your very own oobleck. Have fun playing around with it and find out how it acts differently from a normal liquid and a normal solid.

Grab a handful and squeeze it. Let it ooze through your fingers. Make a puddle and quickly drag your fingers through it. Punch at the oobleck and then slowly let your fist sink in. Roll some oobleck into a ball. It becomes solid, but when you stop moving it, it will melt back into your hand. Try tossing it in the sky, or to a friend.

Take things a bit further and learn more ! : It’s a Solid It’s a Liquid It’s Oobleck!

Does baby powder work for oobleck?

Making Oobleck with Baby Powder – When we set out to make oobleck with baby powder I wasn’t sure how the added ingredients would affect our recipe, but it turns out it didn’t affect it at all. We used our standard 2 cups of baby powder and 1 cup of water and it turned into a perfect non-Newtonian Fluid.

Why is corn flour called oobleck in the USA?

Scientists from the US National Institute of Standards and Technology (NIST) and Georgetown University have uncovered the mechanisms that cause a soupy mixture of cornstarch and water known as ‘oobleck’ to switch between a liquid and a solid in response to stress.

  1. This could help to end a long-running scientific debate and also improve processes ranging from pouring concrete to making better body armor.
  2. Oobleck’s name is borrowed from a classic Dr Seuss book called Bartholomew and the Oobleck,
  3. Squeeze or pound this slurry of cornstarch and water and it becomes solid in an instant, only to revert to ooze once the stress is relieved.

The NIST and Georgetown scientists have developed a new picture to describe oobleck and similar mixtures of fine particles suspended in liquids. Based on flow measurements of tiny silica beads dispersed in solution, the model invokes two competing theories to explain the phenomenon of ‘shear-thickening’ fluids, which stiffen in response to stress.

Known more formally as non-Newtonian substances, shear-thickening fluids are more than just curiosities. “They dictate how much stuff you can move and at what speed,” said Daniel Blair, a Georgetown University physics professor and co-author of an article published in Physical Review Letters, “In the chemical processing industry, you’re looking for the most efficient way to move something through a pipe, without breaking a pump.

To do that, you want to know as much as you can about shear thickening so you can control it.” Opposing theories – one drawing mostly on experimental evidence, the other on results of modeling studies – have been proposed to explain shear thickening in suspensions of microscopic particles, also known as colloids.

  • Rather than competing, it turns out that the two theories are complementary, according to the new research.
  • The ongoing debate concerns the role of lubrication-based hydrodynamic interactions versus frictional contact forces,” explained lead author John Royer, a NIST materials scientist.
  • In the chemical processing industry, you’re looking for the most efficient way to move something through a pipe, without breaking a pump.

To do that, you want to know as much as you can about shear thickening so you can control it.” Daniel Blair, Georgetown University At low concentrations of silica beads, Royer, Blair and NIST materials scientist Steven Hudson found that measurements of stress were consistent with the hydrodynamic model, which posits that impacts force the particles to pack into assemblies called hydroclusters.

As the stress increases, these hydroclusters contract and the fluid thickens, or becomes more viscous. Liquid is squeezed out of the clusters, creating an ever-thinner lubricating layer separating the particles and making the scattered clusters more rigid. But as in earlier experiments, Royer says, the amount of shear thickening they observed exceeded the levels that models indicated could be achieved with hydroclusters.

A competing model invokes frictional contacts – essentially, particle collisions caused by stress – as the primary driver of thickening. But the friction model requires materials to expand – or dilate – once stress surpasses a certain threshold and for particles to lock into place so that they are unable to squeeze by each other, as in the hydrodynamic model.

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Therein lies the rub. Experiments to date have not yielded evidence of stress-caused expansion, leading some scientists to rule out friction as playing a significant role in shear thickening. Royer and colleagues tackled these quandaries by measuring how colloids made up of different concentrations of bacterium-sized spheres responded to stresses ranging from slight to large.

These measurements, performed on a state-of-the-art flow-measurement device known as a rheometer at Georgetown’s Institute for Soft Matter Synthesis and Metrology, unmasked ‘a previously hidden transition from hydrodynamics-dominated to friction-dominated interactions as the shear thickening becomes more pronounced,’ Royer said.

The scientists found a transition from contraction to expansion, which occurs without fanfare – or no observable change in the shear-thickening behavior. “This transition demonstrates that shear thickening is driven primarily by frictional contacts, with hydrodynamic forces playing a supporting role at lower concentrations of particles, when mixtures are less dense,” Royer explained.

“These results now motivate new microscopic approaches to control shear thickening in industrial applications, by either minimizing thickening when steady flow is needed or controlling thickening for use as in flexible body armor applications.” This story is adapted from material from NIST, with editorial changes made by Materials Today.

What is the scientific name for oobleck?

Oobleck While playing with Oobleck students should identify that normally solids have a definite shape whereas a fluid can change shapes because it flows, Oobleck doesn’t quite follow the rules, this suspension only behaves as a fluid some of the time.

  • For this reason oobleck is known as a non-Newtonian Fluid.
  • If you apply a force to it by smacking or squeezing it this fluid will become a solid.
  • A non-Newtonian fluid is a fluid that does not follow Newton’s law of viscosity.
  • In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid.

Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. The explanation for the strange behaviour of Oobleck lies in the shape of cornstarch particles, which are long and thin. When cornstarch mixes with water, the starch does not dissolve, but remains in suspension.

  1. Move the mixture slowly, and the particles slide past each other.
  2. Move it quickly, and the particles tangle with each other so that the mixture hardens.
  3. Using a material that doesn’t behave according to the ‘rules’ is a great way to get students to explore what they already know about the difference between solids and fluids.

: Oobleck

Who is the founder of oobleck?

Oobleck gets its name from the Dr. Seuss book Bartholomew and the Oobleck where a gooey green substance, Oobleck, fell from the sky and wreaked havoc in the kingdom. Here the Oobleck will be made in a bowl and will likely make a mess, but only because you can get carried away playing with it!

Is oobleck strong enough to stop a bullet?

Non-Newtonian fluids, such as Oobleck are only about 10% better at stopping pointed bullets of any caliber than pure water is. Ballistic Gel on the other hand is approximately 30% better than water at stopping any round.

Is non-Newtonian fluid bulletproof?

They conclude that the viscoelasticity is responsible for the bullet stopping power of non-Newtonian fluids.

Is it OK to drink cornstarch?

Is cornstarch bad for you? – Small servings of cornstarch are not bad for you. However, eating a large amount of cornstarch or consuming it raw is not recommended. Cornstarch tends to be high in carbohydrates and low in nutrients. This gives it a high glycemic index.

A food’s glycemic index describes how much that food affects your blood sugar level. Foods with a high glycemic index, like cornstarch, are digested quickly and cause your blood sugar level to increase quickly. This affects all of us and is especially important for individuals with diabetes to be aware of.

Most starchy foods have a high glycemic index and should be enjoyed in moderation.

How do I get rid of oobleck?

Disposal and Cleanup – Do not dispose of the oobleck in the sink! We place the oobleck mixture into plastic trash bags and carry to the dumpster. If indoors, we have found that allowing the area to air dry first makes it easier to sweep up the cornstarch. If outside and a garden hose is available, hose down the area sufficiently with water.

Can you walk on oobleck?

What can you do with oobleck? – We tried walking, running and even cartwheeling over the oobleck. The children found that if they ran quickly over the surface, their feet stayed dry, but if they walked slowly, they started to sink! Once the big children had finished playing for the day, we added some plastic fish and turned it into an ocean play tray for the littlest member of the family. Cornflour Slime Walking on Oobleck Last Updated on June 23, 2023 by

What is potato slime?

Science Nov 13, 2015 3:28 PM EDT Clostridium puniceum is a bacteria that spews a pink slime on potatoes. Sounds kind of gross, right? But ingredients in the slime may also help fight dangerous antibiotic-resistant germs like MRSA (Methicillin-resistant Staphylococcus aureus ).

  • This pink slime forms when C.
  • Puniceum bacteria infect potatoes during wet seasons and under humid storage conditions.
  • It not only infects potatoes, but other root and tuber vegetables, such as carrots and sweet potatoes.
  • Note: This pink slime isn’t connected to the meat stories that went viral a few years ago) “The bacterium is ‘soft rotting’ or pectolytic, meaning it breaks down plant cell walls,” said plant pathologist Amanda Gevens at the University of Wisconsin-Madison.
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” can be found in soils and may be subsequently brought into potato storages on tubers during the harvest process.” C. puniceum typically thrives in environments with little to no oxygen, so how these bacteria are able to survive and infect potatoes in oxygen-rich environments like these potato storage units has befuddled scientists. Microscopic view of Clostridium puniceum bacteria causing pink slimy potato rot. Photo by Gulimila Shabuer They stab-injected potato tubers with C. puniceum and let them rot for four days. Next, the team extracted samples of the infected potatoes and analyzed the ingredients.

  • They found that the slime contained two primary proteins called clostrubin A and clostrubin B.
  • As Carmen Drahl described in Forbes, Hertweck’s team had previously identified the gene for clostrubin A in 2014.
  • So for the current study, the researchers genetically removed the clostrubin A and observed how mutant bacteria reacted in an oxygen-rich environment.

When they knocked out the clostrubin A gene, pink slime was unable to grow and the bacteria could no longer infect the potatoes. When they added back the Clostrubin A to the mutant strain, sure enough, the pink slime grew again. Like a protective mask or space suit, the clostrubin slime ensured the survival of C.

Puniceum in hostile oxygen-rich environments, the researchers reported November 5 in the journal Science, Why should you care? “These clostrubin compounds are also potent antibiotics and can be used to protect plants from other bacterial pathogens and also to protect humans and animals from various bacterial diseases,” Herwick said.

Hertweck’s team found in 2014 that clostrubins were capable of killing infectious bacteria such as MRSA, The discovery of the clostrubins and their potential to fend off pathogenic bacteria like MRSA is just a starting point. As Drahl notes for Forbes, a team in China has synthesized clostrubin from scratch, so drug makers could avoid the messy step of dealing with slimy potatoes.

  1. This may expedite clostrubin’s potential journey to becoming an antibacterial.
  2. But the findings also suggest that impairing clostrubins could help save our potatoes from rot.
  3. Potatoes are an extremely important component in the human diet.
  4. According to the US Department of Agriculture, potatoes are one of the leading vegetable crops in the United States and the fourth most consumed food crop in the world, after rice, wheat and corn.

Every year, pathogens and the diseases they cause can greatly impact the quality and yield of crops. “Food spoilage is a real issue in our world – and research in this area is critical,” Amanda Gevens said. Left: Clostridium puniceum infected potato. Photo by Gulimila Shabuer

What is fluffy slime called?

Cloud Slime – Make soft and fluffy cloud slime that you won’t want to stop playing with! It creates a pillowy slime that forms soft strings that melt back into itself. Project Time 10 minutes Resting Time 8 hours Total Time 8 hours 10 minutes

What is the scientific name for oobleck?

Oobleck – Science World While playing with Oobleck students should identify that normally solids have a definite shape whereas a fluid can change shapes because it flows, Oobleck doesn’t quite follow the rules, this suspension only behaves as a fluid some of the time.

  1. For this reason oobleck is known as a non-Newtonian Fluid.
  2. If you apply a force to it by smacking or squeezing it this fluid will become a solid.
  3. A non-Newtonian fluid is a fluid that does not follow Newton’s law of viscosity.
  4. In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid.

Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. The explanation for the strange behaviour of Oobleck lies in the shape of cornstarch particles, which are long and thin. When cornstarch mixes with water, the starch does not dissolve, but remains in suspension.

Move the mixture slowly, and the particles slide past each other. Move it quickly, and the particles tangle with each other so that the mixture hardens. Using a material that doesn’t behave according to the ‘rules’ is a great way to get students to explore what they already know about the difference between solids and fluids.

: Oobleck – Science World

What is the polymer in oobleck?

In this module we will be experimenting with ‘oobleck’, a fluid made by suspending the polymer cornstarch in water. This fluid has a viscosity that increases when shear stress is applied, so instead of resistance increasing linearly, resistance will increase at an increasing rate.

Is oobleck related to chemistry?

In chemistry, oobleck is considered a colloid, a substance in which the small particles of one substance are dispersed throughout another substance, but not chemically bonded.

Is oobleck a liquid or solid?

It’s a Solid It’s a Liquid It’s Oobleck! Oobleck is a non-Newtonian fluid; it has properties of both liquids and solids. You can slowly dip your hand into it like a liquid, but if you squeeze the oobleck or punch it, it will feel solid. Ages 5-7 (great for families to do together) Materials Needed:

Mixing bowl Corn starch Water Food coloring (optional)

Instructors: Amanda Royce & Caitlin Wollack This is a pre-recorded video with instructions on how to make your very own oobleck. Have fun playing around with it and find out how it acts differently from a normal liquid and a normal solid.

Grab a handful and squeeze it. Let it ooze through your fingers. Make a puddle and quickly drag your fingers through it. Punch at the oobleck and then slowly let your fist sink in. Roll some oobleck into a ball. It becomes solid, but when you stop moving it, it will melt back into your hand. Try tossing it in the sky, or to a friend.

Take things a bit further and learn more ! : It’s a Solid It’s a Liquid It’s Oobleck!