MS-ESS2-4

Develop a model to describe the cycling of water through Earth's systems driven by energy from the sun and the force of gravity.

  1. Earth

    Ice on the move

    Flowing glaciers help scientists study climate change.

    By Alexandra Witze
  2. Climate

    A dire shortage of water

    Parts of the southwestern United States are in the middle of the worst drought in at least 500 years.

    By Emily Sohn