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On our ever-changing Earth, conditions may change quickly or slowly. Some changes come from natural processes; some from human activity. Satellites allow us to see conditions and track changes over time — in land use, forest health, land/water interface, and so on. Since 1972, Landsat...
Grade Level   6 7 8 9 10 11 12
Classroom Activities Curricula and Instruction
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Geographic information systems (GIS) are mapping and analysis tools that people use in all walks of life. GIS is problem-solving technology, for careers in research, policy-making, and production — in government agencies, non-profit groups, and for-profit companies, from global to local...
Grade Level   6 7 8 9 10 11 12
Classroom Activities Curricula and Instruction
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