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Physical Science: Module 4 & 5Who'd have thought one could write two long chapters about water? We just spent 3 weeks discussing the chemical attributes of water, and the hydrologic cycle. To some extent, this was review of previous work we had done years ago in an Abeka science book.
Module 4: Electrolysis PolarityPolar Molecule Solvent/Solute Hydrogen bond Cohesion
Module 5: Hydrosphere Hydrologic cycle Evaporation/Transpiration Condensation/Precipitation Distillation Residence time Salinity Firn Water table/Percolation Atmospheric Moisture Adiabatic cooling Cloud condensation nuclei
After completing an experiment on the stove with salt water, my 12 yo wrote this short summary: "The salt water source evaporates and changes into water vapor, which through condensation, turns into water droplets. When the water droplets collect in the bowl, they are fresh water, because when evaporating, the salt stays in the pot. The salt water source represents the ocean. Evaporation and condensation is the process by which water from the ocean turns into a cloud. This shows us that we can change salt water (the ocean) into drinkable water."
Unfortunately, I had no charged batteries in my camera, so no pics of the scientists at work. Mom will have to prepare better for our next lab experiment.
1:18 PM - Oct. 22, 2007 - post comment
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