During a routine clinic visit, a 25-year-old multigravid client who initiated prenatal care at 10 weeks' gestation and is now in her third trimester states, "i've been having strange dreams about the baby. last week i dreamed he was covered with hair." the nurse should tell the mother:

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.