That moment that ketchup transitions from a solid, high up in the ketchup bottle, to a liquid that squirts all over your fries – that moment is a big physics moment. Why? Ketchup is a non-Newtonian fluid (like oobleck, peanut butter, custard, toothpaste, paint, blood, or quicksand) that can switch between a solid and liquid state, and ketchup is non-Newtonian in two different ways…
In that transition moment, ketchup may be responding to a strong, quick force, suddenly making it thinner, or if you’re patient and apply just a wee bit of force, it may start flowing given some time and gravity. Grab a ketchup bottle and get the details in this TED Ed lesson by George Zaidan, with animation by TOGETHER.
Related watching: oobleck, TED Ed, the incredible physics of ants, and more about that sugar in your ketchup.
We know that sugar is a big part of candy, ice cream, and sweet drinks, but did you know that added sugars are included in 3/4 of the 600,000+ products found in the average grocery store? And that it can go by 56 different names?
Watch this super useful TED Ed by Robert Lustig, with animation by The Tremendousness Collective, to learn more about the different kinds of sugar inside the foods that we eat, and how it interacts with our bodies: Sugar: Hiding in plain sight.
Related watching: The Cook’s Atelier, China’s farm to table movement, How Gardening Enables Interdisciplinary Learning, and more TED Ed videos.