HS-PS2-2

More Stories in HS-PS2-2

  1. Physics

    Here’s why ducklings swim in a row behind mom

    Baby ducks save energy by surfing their mother’s waves, but only if they do it in an orderly line.

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  2. 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.

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  3. Physics

    Scientists Say: Velocity

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

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