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5. a layer inside a planetary body bounded below by a core and above by a crust.
6. a dish of Italian origin consisting of a usually round, flat base of leavened wheat-based dough topped with tomatoes, cheese, and often various other ingredients, which is then baked at a high temperature, traditionally in a wood-fired oven.
9. when two tectonic plates move away from each other
10. rocky outer part of the Earth. It is made up of the brittle crust and the top part of the upper mantle.

1. a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries.
2. molten or semi-molten natural material from which all
3. the innermost geologic layer of planet Earth
4. lies above Earth's solid inner core and below its mantle
7. a thin shell on the outside of Earth, accounting for less than 1% of Earth's volume.
8. an area on Earth where two or more lithospheric plates collide