What generates the heat necessary for convection in the earth?

Heat generated from the radioactive decay of elements deep in the interior of the Earth

Explanation:

Heat is generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the asthenosphere.

The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle of the Earth.

The asthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the Earth that extends to 2900 km.

Radioactive material generates the heat needed for convection in earth

Explanation:

Radioactive material generates the heat needed for convection in earth

Convection currents driveplate tectonics of the magma Throughout the aesthenosphere, heat produced from radioactive decay of components deep inside the Earth produces magma (molten rock). The aesthenosphere (70~250 km) is part of earth's mantle, the Earth's center sphere reaching 2900 km.