CANNON and the OOBLECK!
It was Mad Scientist Sunday.
We put on our aprons and lab coats and poured four boxes of corn starch
into the red storage box. Dad brought a
big pitcher of water to the table. After
Cannon explored the texture of the super fine cornstarch – it is so fine some
people use it as baby powder – then we started adding water. When we had just the right balance of
cornstarch and water we had Oobleck.
Oobleck is a pressure –dependent substance like Silly Putty and quicksand. They are not liquids and not solids. They are known as Non-Newtonian fluids. Applying pressure to the mixture increases its viscosity (thickness). A quick tap will make it feel hard because it forces the cornstarch particles together. But if you dip your hand slowly into the mix your fingers slide in as easily as through water. Moving slowly gives the particles time to move out of the way. *
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It took a good bit of effort from Dad to clean up all of the
cornstarch from the floor. Just when we
thought it was all cleaned up we found another bit waiting to be swept up. We
saved the box of Oobleck to play with later. Then we read the book by Dr. Seuss.
He made Oobleck famous with his book, Bartholomew and the Oobleck.
H2O Color –Watercolor
Cannon made good use of his new large palette for liquid
water colors. Before he painted he used a “magic” (white) crayon to make invisible lines on
white pape. When he painted over them with watercolors the lines magically
appeared.
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| Cannon paints independently with his watercolors. He is using a resist technique with white crayon. |
Reading and Word Play
We took time out for some more of the Captain Underpants
book and finished our day with a chapter from Frog and Toad about good friends
raking leaves for each other. Cannon used the Banana-gram tiles to find words in the "it" family; fit, sit, lit, bit, hit.
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