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  • Understanding Chemical and Physical Changes

    Journal Article | February 2020

  • Physics Changes with Scale

    Book Chapter | January 2007

    At the nanoscale, a completely different set of forces and interactions are experienced by molecules and atoms than we experience at the human scale. How do properties change with scale? Why is gravity so important to…

  • Butter Battle: Physical Changes Versus Chemical Changes

    Book Chapter | April 2011

    When passing hot rolls around the dinner table, buying popcorn at a movie theater, or making cookies, it is there: butter. Creating butter in a bottle helps students see how a physical change can be more drastic than an…

  • Modeling: Changes in Traditional Physics Instruction

    Book Chapter | January 2005

    This chapter highlights the modeling approach to high school physics instruction—a curriculum design that engages students in constructing a few basic models of physics. Model development begins with students working in…

  • Emphasizing Physics Concepts with Cartoons

    Journal Article | February 2020

    Another important distinction is between mass and weight. Mass … mg) that slowed the ball still acts on the ball. Likewise, its mass remains the same … And what is the ratio of force to mass? Isn’t that acceleration as per Newton …

  • Refraction

    Journal Article | February 2020

  • Emphasizing Physics Concepts With Cartoons, Part II

    Journal Article | March 2020

    an electric field. Just as a gravitational field surrounds an object with mass … the wider view is that energy and mass are two sides of the same coin … The relationship between energy and mass encompasses all energy transfers …

  • Refraction

    Journal Article | April 2019

    Exploring light as it moves from one medium to another with the intriguing result of different speeds—the bending of light we call refraction.

  • The Pulled Spool—Which Way Does It Roll?

    Journal Article | May 2020

  • Quickly Teaching Speed, Velocity, and Acceleration—Part 2

    Journal Article | March 2019

    In the February 2019 issue we looked at teaching speed and velocity. Now we’re ready to tackle acceleration.

  • The Photoelectric Effect

    Journal Article | October 2019

  • Exponential Growth and Doubling Time

    Journal Article | June 2020

  • Minds-On Matter: Phase Changes And Physical Properties

    Book Chapter | October 2012

    In this inquiry, students work to answer the question, How do the physical properties of a material change during phase changes? Students observe and measure physical properties of solids, liquids, and gases. They also…

  • Superhero Physics

    Journal Article | March 2020

  • Arguing About a Chemical Change

    Journal Article | November 2019

    of how the molecules interact and recombine during the chemical reaction … Table 1) highlights key components of ACT-type questions …

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