Weegy: Use the Richter scale to indicate the strength of an earthquake, and the Mercalli intensity scale to indicate the damage produced. User: Mountain climbers can use a _____ map to tell them the _____ of their climb. Weegy: Mountain climbers can use a topographic map to tell them the elevation and steepness of their climb. User: The Earth's interior heat and pressure drive mantle convection. This is the power that drives _____, the main force behind earthquake and volcanic activity. Weegy: The Earth's interior heat and pressure drive mantle convection. This is the power that drives plate tectonics, the main force behind earthquake and volcanic activity. (More)