Tuesday, February 28, 2012

Density in Nature

We've been learning about Democritus (above).  He discovered the concept of the atom.

To help us understand the concept of density in nature we poured oil, then water, then maple syrup into a glass.  The density of each liquid can be seen in this picture:


Because the atoms in oil are packed loosely, the water and syrup could pass through and settle below it.  It was the same with the water.  Atoms in the maple syrup are the most tightly packed, making it the heaviest.
















Next we dropped several solids into the layers of liquids.  We predicted what would happen with each solid.  We started with the cork.  It floated on the top because its atoms are loosely packed, making it the lightest.  Next we dropped in the grape.  It settled on the top of the maple syrup.  The rock sunk to the very bottom, showing that is it even heavier than the syrup.  The rock's atoms are VERY closely packed.  The ice went to the top of the layer of the water, showing that the atoms in ice are more loosely packed than the atoms in water.


Friday, February 10, 2012

My Magic Number-By Anna Coke

For math today we found out what our "magic" numbers are.  We used a code to add up the letters of our full names. My name is Anna and my magic number is 6.  That means that I am Fair unselfish and careful of other people's feelings. I like to keep things neat and well organized.  It was fun.
We also learned about Magic squares.  Above, is an example.  All the rows add up to 15!

Thursday, February 9, 2012

Tuesday, February 7, 2012

Math Time- By Anna

Today For math we wrote a story about math and we quizzed each other on math questions. Each person wrote a story problem and some one would solve it. I wrote a story about skate boards mom had To solve it. Then we baked cookies!!!