How to pronounce“asthenosphere”in English

Roughly 95 percent of Earth’s surface is made up of seven major plates, with the rest covered by much smaller ones.And underneath those plates is the asthenosphere, where intense heat from Earth’s core warms up the mantle rocks so much that they flow around and bend like taffy.The hottest rock creeps upwards toward the surface, and the colder stuff at the top sinks back down, creating convection currents, or heat-based flow cycles.