1. Explain the convection cycle that takes place within Earth’s layers. Describe the source of thermal energy, the direction of energy and matter flow, and the role of gravity in the process. 2. How do convection cycles connect to convergent and divergent tectonic plate systems?

3. Support this claim with evidence and reasoning: Thermal convection within the Earth’s mantle provides a mechanism for the recycling of rock on Earth’s surface.

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