OCR Celebrates Dr. Seuss' Birthday!
Wednesday, March 2nd, 2017 was Dr. Seuss’s Birthday. OCR celebrated his birthday with some fun, educational activities.
Students were given colored Goldfish cheese crackers and learned to create line plots and bar graphs to represent the number of colors of goldfish crackers that they were given. This activity related to Dr. Seuss’s book, ‘One Fish Two Fish.’
Mrs. Baker had students toss ping pong balls into hats, recording their successes as fractional representations of their attempts.
Mrs. Moir had the students make oobleck and discussed the physical changes and properties of matter. Oobleck is a non-Newtonian fluid* made of cornstarch and water, named after the substance in the Dr. Seuss book, Bartholomew and the Oobleck. (A non-Newtonian fluid is a fluid whose viscosity is variable based on applied stress or force.)
Mrs. Kobilca read Dr. Seuss’s book “The Lorax” and discussed the causes and impact of air pollution.
*About Non-Newtonian fluids and states of matter:
First, a definition: Viscosity, essentially, is the measure of a fluid's resistance to movement or deformation. Water is much less viscous than pancake syrup, for example.
Without getting overly technical, one good way to look at it is that a Newtonian liquid's viscosity won't change when it is stressed (pushed, vibrated, moved across a surface, etc). Using this definition, there can be two types of non-Newtonian liquids, depending on if the viscosity increases or decreases when the fluid is stressed.
Oobleck is a "shear thickening" non-Newtonian fluid. Corn starch is mixed with water and sometimes has coloring added. If you shake or hit the mixture, it will, instead of flowing and slopping around in its container, suddenly get hard. The moment that the stress is removed from the oobleck, it returns to its liquid state.
The other non-Newtonian types of fluid are called "shear thinning liquids." Ketchup is an example. Hold a bottle of ketchup upside down and the ketchup will stay in the bottle, but start vibrating it (or knocking on side of the bottle) and it will flow right out. It's not magic; it has been sheared and its viscosity was decreased, so it flows out more easily.