Why do most volcanoes and earthquakes happen along tectonic plate boundaries?
{"id":21995,"questions":[{"type":"multi-choice","id":"46705","dataJson":{"prompt":"Why do most volcanoes and earthquakes happen along tectonic plate boundaries?","options":[{"key":"Because the Earth's crust is thicker at the boundaries","label":"Because the Earth's crust is thicker at the boundaries","value":"Because the Earth's crust is thicker at the boundaries"},{"key":"Because the Earth's crust is weaker at the boundaries, allowing magma to rise and plates to move","label":"Because the Earth's crust is weaker at the boundaries, allowing magma to rise and plates to move","value":"Because the Earth's crust is weaker at the boundaries, allowing magma to rise and plates to move"},{"key":"Because the Earth's mantle only exists at the boundaries","label":"Because the Earth's mantle only exists at the boundaries","value":"Because the Earth's mantle only exists at the boundaries"}],"feedback":"","limitChoices":{},"question_type":0,"validResponse":["Because the Earth's crust is weaker at the boundaries, allowing magma to rise and plates to move"]}}]}
Why do most volcanoes and earthquakes happen along tectonic plate boundaries?
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