HS-PS2-2

More Stories in HS-PS2-2

  1. Space

    Ingenuity helicopter makes history by flying on Mars

    The copter's 40-second-long flight in the Red Planet’s thin air is only the first in a planned series of daring flights.

    By Lisa Grossman
  2. Physics

    Scientists Say: Velocity

    Velocity is more than speed. It is both speed and the direction in which an object is traveling.

    By Bethany Brookshire