1. Driving Force of Plate Movement
Convection Currents, Density, and Gravity

2. Energy Source Planetesimals collisions
Planetesimal Energy
Radioactive Decay
Planetesimals collisions
Carried kinetic energy then transformed into heat energy when they collided with Pre-Earth
Gravity = glue
Radioactive elements (uranium, thorium, and potassium)
When they decay they emit subatomic particles, which their energy of motion is transformed into heat
Most energy is store in the CORE

3. Convection Current
“is a mechanism of energy and mass transfer in which hotter material rise and cooler material sink” (15).
Drives the motion of the outer core then the mantle then the lithosphere (plates)

4. Motion
“The heated matter rises under the force of buoyancy because it has become less dense than the matter above it. When it reaches the surface, it gives up heat and cools as it moves sideways, becoming denser. When it gets heavier than the underlying material, it sinks under the pull of gravity, …” (15).
Buoyancy: