Saturday, February 25, 2012

Friday, February 24, 2012

Today, no math! N has finished Singapore Math 4A, and S is one (very long) review away from finishing Singapore Math 2A, so we took a welcome break from math today. 

We did experiments 91 and 92 from Janice VanCleave's science book (the science book used for Classical Conversations -- I've been impressed with this book, because the experiments are all interesting, simple, and cheap, and they use ingredients we typically have on hand -- the four requirements that must be met before we will undertake most projects at home :).  

For the first experiment, fill a cup with water and add one teaspoon milk:

Fill a second cup with water and add three tablespoons salt:

Carefully drop a raw egg into each cup:

The egg in the water/milk sinks; the egg in the water/salt floats. The water/milk is less dense than the egg, so the egg sinks; the water/salt is denser than the egg, so the egg floats. Pretty awesome to make our own sink/float activity using the same object, an egg! We asked N some questions about this experiment, and she ordered the density of the three items (the water/milk is the least dense, the egg is next dense, and the water/salt is most dense). Great experiment -- thanks Mrs. vanCleave

Next, we filled a cup with 1/2-cup water then carefully poured 1/2-cup rubbing alcohol on top of that.   

We used an eye dropper to add cooking oil underneath the top of the alcohol layer, and we watched the oil form perfect spheres suspended between the alcohol and water. The oil would never form a sphere if it were dropped on a countertop, but because the oil is suspended in the alcohol, it is unencumbered by gravity and instead pulls itself into a shape that takes up the least surface area -- a perfect sphere! (Next time, perhaps we'll add food coloring to the oil and make our own mini-lava lamps. :)


S - making her own tree from the parts of a tree puzzle:


G - brown stair and dusting ("Mama, these are all dusty." "OK, grab a brush and dust them off." :)


Then we used a marble as a control of error (an extension I read about at The Wonder Years long ago). To our delight and surprise, the marble turned the brown stair into a homemade xylophone! :)
video

We've tried this extension before with metal marbles we had on hand, but we did not notice the musical effect. We recently got new (synthetic?) marbles to use with our golf tee activity (because the metal marbles go to a marble run kit, and I didn't want to steal them out of there for the golf tee activity), and we used those marbles this time. I imagine glass marbles might work well, too.

We used our Discovering Great Artists book--again, a great choice used in the Classical Conversations curriculum--to learn about Wassily Kandinsky. He considered paintings to be music on canvas. We closed our eyes and listened to a Mozart sonata (Sonata #16 in C Major for Piano from this collection my husband got on sale for $0.99 ;), and then we painted what the music sounded like to us:



The girls painted a lot of different things -- here are a few.

N - European landmarks (from this Around the World Toob, which we recently got to bolster our continent boxes) at sunset (From L to R: Eiffel Tower, Leaning Tower of Pisa, l'Arc de Triomphe):

S:

G:


G:


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