This lab used basic/cheap materials to give students hands-on experience with mechanical and chemical weathering. Jars,sugar cubes, timers/clock, and digital scales are all you need to show the affects of abrasion, surface area, and temperature on the rate of weathering. I used this lab with both 6th and 8th grade. The lab is divided into 2 parts and I like the versatility of being able to use part or the whole lab depending upon my students' needs. I have included an answer key for easy grading. I will be using this lab again!