I used this quick labeling pie chart SMART Notebook activity to review with my students and visualize the percentages of nitrogen, oxygen, etc.Movable labels include: Nitrogen, Oxygen, trace, and the percentage numbers. I reviewed the makeup of the trace elements as well. Dust, CO2, H2O, etc.Also, please find this activity as part of an Earth Science bundle with 9 Middle School Earth Science Science click and drag SMART Notebook activities, with a bonus download.