After observing and collect data for the properties of the different substances and the mixture the previous day, students discussed the difference between mixtures and solutions. Chelsea stated, "A mixture is when two or more substances are combined and can be separated easily and is not chemically bonded". A solution is when a substance dissolves into another substance and is difficult to separate. Students were able to see that the concoction they made by combining the mulch, salt and corn starch in the water was a mixture. They used a screen to easily remove the mulch by pouring the liquid into another cup. They also realized that the remaining liquid was a solution now. They learned and discussed that the water would eventually evaporate leaving the salt and corn starch. Students simulated this by placing a few drops of liquid in a Petri dish. After the weekend, they were able to see that the water had in deed evaporated leaving the salt and corn starch. Elise thought, "It was cool because we got to see how separate a mixture." Cade also said, "I thought it was fun because we got to perform a science lab and learn about solutions and mixtures."
I hope you enjoy learning how the garden changes throughout the school year.