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Geography4Kids Quiz: Earth Structure OverviewQUESTION 1: INCORRECT Every planet in our system has a different structure. Underneath the surface, there are specific layers and each layer has different types of materials. One of the things that makes the Earth unique is its swirling core of liquid iron. That core maintains a magnetic field that protects the Earth from much of the Sun's dangerous energy. > Continue to Next Question > Restart Quiz
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