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Students are introduced to classification through progressive activities. Initially, the teacher models the task by classifying buttons. Students then devise a classification scheme for paper clips. Subsequent activities use objects brought from... (View More) home or the playground by students. The objects are assigned to two categories: natural or human-made, then classified as solid, liquid, gas or a combination. Simple bar graphs are used throughout to compare classification data. (View Less)
Students in grades 7-10 analyze land cover change in order to help them grasp the extent, significance, and consequences of land cover change; and to introduce them to the perspective of space-based observations.