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Inside a Young Planet

Open to everyone until Tuesday, September 29

To keep it, print it while it is open.

Long ago, a young planet was a hot mixture of rock and metal. Gravity pulled the heaviest metal to the middle, while lighter rock rose and wrapped around it.

In the picture

  1. Metal core: the dense metallic center.
  2. Mantle: the thick rocky zone around the core.
  3. Crust: the thin rocky outer shell.

Examples

  • A muddy jar left to stand: heavier mud sinks and clearer water rises.
  • A peach: a hard pit sits at the center with softer fruit around it.

Carry on in the app

Three questions on this lesson, to check the idea stuck. Free in the app while the lesson is in the free week.

At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.

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Science, Age 11