9781422270875

WORDS TO UNDERSTAND

3-D printing: a manufacturing process that first begins with the design of a product using 3-D modeling software; the machinery then uses data from the design file to apply successive layers of powder, liquid, sheet material, or other ingredients to fabricate a 3-D object earmark: to set aside a specific amount of funds or other resource for a particular purpose economy: activities related to the production, use, and trade of services and goods in a city, state, region, or country raw material: a basic material—such as oil, gasoline, lumber, corn, grain, plastic, natural gas, coal, and minerals—that is used to create or manufacture more complex products

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