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. Climate

    Explainer: Why a tornado forms

    Tornadoes start with a thunderstorm. But they also require other ingredients, such as instability.

    By Andrew Bridges
  2. Climate

    Explainer: El Niño and La Niña

    By Stephen Ornes
  3. Climate

    Germy weather

    Bacteria high in the sky could be causing rain, snow and hail.

    By Stephen Ornes
  4. Earth

    Ice on the move

    Flowing glaciers help scientists study climate change.

    By Alexandra Witze
  5. 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