Contract Complete the paragraph below to summarize Earth's
original sources of Internal energy.
core
crystallize
kinetic
gravitational
The initial source of Earth's internal thermal energy
was
The
energy of the objects that
collided to form Ear was converted into thermal energy.
As Earth gained mass, its also increased, causing it
to This caused further heating, as gravitational
potential energy was transformed into energy
Once Earth was molten, iron and other
elements sank toward the center to form the
Their potential energy was also converted into
thermal energy. Over time, the core and other layers
began to releasing additional thermal energy.
thermal
Heavy (or
dense)
accrellon
(or
collisions)
gravity