The Excalibur Effect
Hosted by Girl Day Innovator: IDEX Corporation
Visit our Booth: Saturday, February 27, 2021, 12 p.m. - 4 p.m.
Recommended Grades: Kindergarten, 1st, 2nd
The Challenge: Create a mixture in a container & try to quickly pull the 'sword' (of your choosing) out of the mixture to see if you're successful! This is a fun spin on the traditional Oobleck mixture of cornstarch and water which has properties of both liquids AND solids! So cool!
What You'll Need:
- Corn Starch (1 cup)
- Food coloring (optional)
- Measuring cup
- Mixing bowl or jar
- Toy "sword" (screwdriver, pencil, any long, straight object)
How to do it:
- Pour your 1 cup of cornstarch into a small mixing bowl or jar
- Slowly add in 1 cup of water, mixing while you go. You want the mixture to become thick & harden when you tap it. If it's too runny, add more cornstarch.
- Add some food coloring if you'd like!
- Insert the toy "sword" into the mixture & try to quickly pull UP on the sword; now, try to slowly pull the sword out.
Do you notice how you're met with lots of resistance when you move the sword quickly & less when you move the sword more slowly?
Video your creation and test and share it on Flipgrid.
This mixture is considered a non-Newtonian fluid, meaning it does not act like most typical fluids. What other common items are non-Newtonian fluids? Ketchup, for one. Quicksand is also a non-Newtonian fluid - so if you ever find yourself in quicksand, now you know how to escape! Slow movements allow you to progress through the fluid with less resistance than fast movements.
Watch the video below to see IDEX Corporation resident scientist, Samantha, create her own Oobleck and try to pull out the sword. Can she do it?
About IDEX Corporation: IDEX Corporation is a manufacturing company composed of many different businesses that likely touch your daily life, & yet you've probably never heard of us! We have 3 segments: Fire & Safety, Health & Science Technologies, and Fluid Metering Technologies. We provide a lot of mission critical components to equipment so that people can access the following (to name just a FEW):
- If you or a family member is battling cancer or another life-threatening disease, your doctor may have tested your DNA in a quest to find the best targeted medicine for you. It’s likely your DNA test was run on equipment that contains components made by our IDEX Health & Science team.
- You can enjoy fresh fruits and vegetables thanks in part to Banjo, an IDEX company. Banjo valves are used on the agriculture sprayers that apply fertilizer on crops.
- And if you were ever in a car accident, the Hurst Jaws of Life® may have rescued you.