The variable group is the type of mulch used. The experiment lasts for at least seven days. Objectives Students measure the height of their plants and record the data daily on a data table created in class. Lesson Plan Give each student one plant and handful of one of the three types of mulch. Tell students to lay the mulch on top of the soil around the base of the plant.
Any colors are acceptable.
My class used orange plants for cedar, purple for cypress, and pink for pink bark. Have students use paper, pencils, and rulers to create their data tables. The tables should provide space for students to note the date and height of each plant. Have students measure the height of the plant and write their measurements on the data tables. Tell students to measure the plants from the top of the soil to the top of the plant.