MS-PS1-4

Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.

  1. Planets

    Possible new saltwater stains on Mars

    Dark streaks that grow in spring, fade in winter may point to saltwater on the Red Planet.

    By Stephen Ornes
  2. Physics

    Explainer: How a synchrotron works

    Giant magnets direct superfast light into beams up to 30 million times as bright as those produced by a laser pointer.

    By Emily Sohn