Students in grades 4 and 5 will enjoy this "mix it" lab. This lab will help students discover by doing. This is a hands on activity.. Lab explanations, lab procedures and a lab sheet are included. Definition cards are included for words such as:solution, particle, dissolve, solubility, etc. At the end of the lesson, students must come up with their own explanations about why some particles dissolve in water and some don't.