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# M1.3.9

Selects appropriate computational techniques in problem-solving situations (e.g., paper, pencil, mental, calculator, computer).

### Studies of a Population of Stars: Mapping the Positions of Stars

Make observations and use available data and simple calculations to correlate observations and data in the characterization of stars. In this activity, students can discover that the positions of stars in the sky illuminates information about the Milky Way galaxy.

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### Studies of a Population of Stars: Distances and Motions

Make observations and use available data and simple calculations to correlate observations and data in the characterization of stars. In this activity, the distances of bright stars are calculated and their motions, in the plane of the sky and in three dimensions are illuminated.

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### Mapping Your State and Community

Detect patterns and uncover cause-and-effect relationships using the Mapping For Everyone web toolkit (http://www.esri.com/mappingforeveryone). By analyzing median age, home value, population change, household size, and other variables, you will be thinking critically and spatially while comparing differences between your neighborhood and others around the country.

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### Coastal Threat: A Story In Unit Conversions

On February 4, 1999, the 639-foot freighter New Carissa became grounded near Coos Bay on the Oregon coast. Aboard the ship were 400,000 gallons of bunker fuel, threatening to leak from the fractured hull and damage the state's fragile beach habitats. With an approaching storm increasing the chances of a disastrous spill, authorities decided to set the ship afire, a choice not without controversy and risks of its own. An oceanographer friend and I became curious about the extent of the disaster associated with the potential spill.

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