November 18

Soil Lab

Third grade finished their Earth Unit with a lab about soil. After a discussion about the parts of soil, we used food to learn more about soil layers.  The square of chocolate in the bottom of our cup was bedrock and the Fruit Loops above it represented weathered rock.  Then we added a crushed Graham Cracker for subsoil.  Chocolate pudding became topsoil and a crushed Oreo was humus.  We topped the cup off with leaf litter (green sprinkles).


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November 16

Young Engineers

Engineers are presented with a problem and then they design a solution using science and math. Our investigation of sink and float continued and kindergarten, Pre-First, and first grade students were asked to design a boat that could hold pennies.  I asked them what ideas they had before we started.  Comments included the following:  “We need to make the bottom the strongest.”  “My boat needs sides, so the pennies don’t fall off and the water doesn’t come in.”  “I am going to spread the pennies out, so my boat doesn’t sink in the middle.”  ” I am going to check for holes in my boat.”  “You need to make sure the corners are tight.”  After we tested our boats, we discussed what we learned and ways we might modify our designs.

I encouraged my engineers to use other materials with their foil (such as pencils, straws, sponges, or Popsicle sticks) to create a boat at home in the bath tub.  Look at the boat that Luke created at his house.

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November 11


Third grade is observing a homemade filtering system.  I layered sand and gravel in the top of a two liter bottle. Then I secured cheesecloth over the opening with a rubber band.  You could also use a coffee filter if cheesecloth isn’t available.  I put very muddy water through the system twice.

Filtered Water Please!

I used two layers of gravel and two of sand.

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