Wednesday, August 21, 2013

Surface Tension and Macroinvertebrates...or...Bubbles And Bugs On The St. Croix



Nature study this morning was a huge hit!  Will and Charlie's summer hiking group, WISE Kids spent a couple hours playing and investigating at the St. Croix National Riverway Center. 

Park Ranger April first led the kids through a scavenger hunt indoors to get acquainted with different animals and features of the river habitat, and then we watched a film about the St. Croix and Namekagan Rivers, with narration by local park rangers we all know and love.  


Next, we headed outdoors into the August heat and humidity to talk about, look at and hold different creatures that live in the river, including a crayfish, scuds, predatory beetles and a leech. 


The kids thought it would be cool to feed one of the insect specimens to the predatory beetles, but April didn't go for it. 
April  also talked about the special ability of Water Striders to walk on water, and how surface tension plays into that.  

Then, expanding on the surface tension idea, the kids had fun making giant bubbles with home made bubble soap.  I got lucky and snapped this cool shot of Charlie and Ranger April:




And here's Will looking like a pro.  I love how the River is in the background here. 




Just one week left of WISE Kids fun this summer.  I can hardly believe it.  The time flies so quickly...



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