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Handout
National Academy of Engineering

Greatest Engineering Achievements of 20th Century: Air Conditioning & Refrigerat

For Students 9th - 10th
Students learn about air conditioning and refrigeration in the 20th century. The resource consists of historical information, a timeline, and a personal essay by a key innovator.
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Unit Plan
CK-12 Foundation

Ck 12: Physical Science: Heating Systems

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Explores the function of a heating system and how it works.