(1) convection occurs in substances that flow.it can be initiated by uneven heating. (2) in the mantle convection of hot rock creates plumes which move tectonic plates. in the outer core convection causes magnetism. (1) is your first question and (2) is your second. hope this helps! :)
Todos os ambientes na Terra mudam com o tempo.
Indigenous people are are ethnic groups who are people who lived at a certain before anyone else
Answer:
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