Mixtures and Solutions

We kicked off our unit of mixtures and solutions by analyzing sodium chloride, diatomacious earth, and gravel mixed with water. The kicker came when students were told they needed to return ALL the materials so they could be used again next year. Using science, students returned 2 of the 3 materials. Next week, students will prepare the NaCl solution again and use a method that does work to get the salt back.