Crust
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Example:
Imagine you're holding a chocolate truffle, with its delicate shell and rich filling inside. The Earth's crust is much like that thin chocolate shell; it's the outermost layer that encases the entire planet. Just as the shell is the first thing you touch when you pick up the truffle, the crust is the outer layer we stand on, covering the much thicker and denser filling, which, in Earth's case, is the mantle. Just as the chocolate shell encases and protects the filling, the Earth's crust serves as a protective layer over the molten and dynamic mantle beneath.
Practice Version
Crust: The thin rocky outer layer of Earth, above the mantle. Crust. The crust is the Earth's surface layer where we live, made of solid rocks and soil.