Sunday, July 4, 2010

Science Sunday: rain and puddles




So, this is an automated post.  I’m trying this idea, of when I do more than one experiment in a week to write the post and put it up as a draft to post sometime when I haven’t done something…….   Here goes,
As we were driving home in the rain Superman asked me, “Mommy why are there puddles?”
Ding!  Experiment here.  So I did a quick explanation of why, and then we got home and it wasn’t raining we did the experiment to see why.  (I needed it to not be raining so I could gather dry versions of our supplies).

Question:  Why do we get puddles when it rains?
Theory: The ground gets too full of water, so it comes out on top of the ground as puddles.
Supplies needed: clear glass jar (I used baby food jars), dirt, something to pour water with

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1.  Pour dirt into the jar until it is about half full.  Make observations about the dirt.
With some gentle prodding they noticed there were empty spots in the dirt.







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2.  Pour in water.  Of course because a lot of what I was using was potting soil it didn’t mix super well.  But it achieved the goal.  They were able to see that a puddle formed on top after the ground ran out of space for the water.

Success!


And, now that I'm getting ready to publish this, I want to wish everyone: Happy 4th of July!

I can't guarantee I'll get to all of your posts this week, but I'll try my best to come back later on and read them.  In theory at this point we're looking at the Grand Canyon!



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