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Environmental Issues: Land Use Change



Environmental Issues: Land Use Change is an interdisciplinary technology-embedded middle school science unit. This curricular unit focuses on how human activities influence environmental changes related to land use. Students use geospatial information technology (GIT) tools including Google Earth and remotely sensed images to investigate modern day land use issues and land use change over time.

The investigations in this unit begin with an examination of the spatial and environmental aspects of a shopping mall in Huntsville, Alabama. Students learn to use basic elements of aerial photo interpretation (including tone, size, texture, pattern, shadow, site, and association) to aid in identifying objects in aerial photographs. They investigate how shopping malls change natural environments and alter its immediate surroundings to understand concepts involved in the formation of urban heat islands.

Next, comes a study of Atlanta’s urban heat island and the consequences of urban deforestation. Students learn how communities can use certain heat island reduction strategies to reduce the impact of an urban heat island effect. They also interpret land use maps of the greater Atlanta area to understand environmental issues that are typically associated with sprawl.

Students investigations continue with a case study of the Lehigh Valley area. They examine the significance of the location of shopping malls in the Lehigh Valley area and compare the land use around five mall areas in the Lehigh Valley using Google Earth.

Students then use remotely sensed images to recognize land use patterns of diverse areas in our world. They examine and interpret time-sequenced satellite data and aerial photographs of urban areas to interpret geographic growth patterns. In addition, they examine landscape changes over time through analysis and interpretation of satellite data images and aerial photographs.

In the culminating activity, students recommend a plan for locating a new Wal-Mart Supercenter in the greater metropolitan Lehigh Valley area to have minimal impact on the environment. Students use Google Earth to analyze and evaluate features of different land areas for proposed development sites. They develop a proposal to apply “smart growth” principles to their planning decisions and communicate their plan in a simulated planning commission meeting.


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