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  2. Physical Science Study Committee - Wikipedia

    en.wikipedia.org/wiki/Physical_Science_Study...

    By the 1964–1965 school year, about half the US students enrolled in high school physics (200,000 students, 5000 teachers) were reportedly using the PSSC course materials. [6] However, considerable resistance developed among some teachers to the disruption of traditional methods of teaching.

  3. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process. The presence on an item of a recycling code, a chasing arrows logo, or a resin code , is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  4. List of physics concepts in primary and secondary education ...

    en.wikipedia.org/wiki/List_of_physics_concepts...

    "High school physics textbooks" (PDF). Reports on high school physics. American Institute of Physics; Zitzewitz, Paul W. (2005). Physics: principles and problems. New York: Glencoe/McGraw-Hill. ISBN 978-0078458132

  5. Recycling - Wikipedia

    en.wikipedia.org/wiki/Recycling

    This is an accepted version of this page This is the latest accepted revision, reviewed on 10 February 2025. Converting waste materials into new products This article is about recycling of waste materials. For recycling of waste energy, see Energy recycling. "Recycled" redirects here. For the album, see Recycled (Nektar album). The three chasing arrows of the universal recycling symbol ...

  6. Paul G. Hewitt - Wikipedia

    en.wikipedia.org/wiki/Paul_G._Hewitt

    Prospective physicists, Kevin Dempsey and Jeffery Wetherhold, attended several of Hewitt's lectures. He would be one of the first to adopt the Hewitt philosophy on conceptual physics. [citation needed] In 1987, Hewitt began writing a high-school version of Conceptual Physics, which was published by Addison–Wesley. Hewitt taught classes on his ...

  7. Waste hierarchy - Wikipedia

    en.wikipedia.org/wiki/Waste_hierarchy

    All products and services have environmental impacts, from the extraction of raw materials for production to manufacture, distribution, use and disposal. Following the waste hierarchy will generally lead to the most resource-efficient and environmentally sound choice but in some cases refining decisions within the hierarchy or departing from it can lead to better environmental outcomes.

  8. Physics First - Wikipedia

    en.wikipedia.org/wiki/Physics_First

    American public schools traditionally teach biology in the first year of high school, chemistry in the second, and physics in the third. The belief is that this order is more accessible, largely because biology can be taught with less mathematics, and will do the most toward providing some scientific literacy for the largest number of students.

  9. Recycling in the United States - Wikipedia

    en.wikipedia.org/wiki/Recycling_in_the_United_States

    Recycling materials waiting to be barged away on the Chicago River Trash and recycle bin at George Bush Intercontinental Airport. Recycling statistics (ca. 2014) [16] with similar numbers as of 2015 [17] An average of approximately 258 million tons of trash is generated by the United States in 2014 34.6% was recycled; 12.8% was combusted for ...

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