Kathryn Hedges

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Recent Posts by Kathryn

Sat Oct 19, 2019 11:22 PM in Chemistry in Elementary classes
Chromatography is another thing that younger children like to do.  Make a mixture of blue and yellow or red and blue or red and yellow food coloring.  Put a small drop into the center of a coffee filter then lay the the filter onto the top of a glass.  Use a dropper to drop water onto the center of the filter paper and watch the colors separate.  Small molecules will move faster than large ones. ...

Sat Oct 19, 2019 11:16 PM in Chemistry in Elementary classes
Make a saturated solution of epson salts ( use hot water and keep adding epsons salts until no more will dissolve).  Make shapes out of heavy weight filter paper or use charcoal brickettes as a base for the salts to crystalize on.  Stand the paper shape or brickette in a shallow dish. Pour the saturated epson salt solution into the bottom of the dish.  Add a few drops of food coloring in differen...

Sat Oct 19, 2019 11:07 PM in Chemistry in Elementary classes
Young students love testing acids and bases using purple cabage extract. (make the extract by boiling purple cabbage in water, filter out the cabbage and use the cooled water.  The juice will turn blue with base (baking soda, cleaning solutions with amonia) and pink with acids (lemon juice, pickle juice, vinegar) Some people even use the cabage juice extracted with alcohol to soak coffee filte...

Recent Reviews by Kathryn

Sat Feb 11, 2012 3:52 PM
5 Cell Division and Differentiation: continuity of
This is a good review of mitosis. Images are clear. I think that this would be good to use as a review for students if it were projected and students could answer questions as you go through the resource.