Permleton's Lab 7: Mercury

Mercury is the closest planet to the sun. It is called a terrestrial planet because it is mostly made of rock. Since the planet has almost no atmosphere it experiences extreme temperature fluctuations. One really cool things about Mercury is that the surface of the planet is covered in large and small craters from where thousands of meteors have struck the planet. Another strange thing about Mercury is that is year (the time it takes to travel around the sun) is shorter than its day (the time it takes for the planet to rotate around its axis).

Pembleton thinks Mercury is pretty cool! What do you think?

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