[ 27 ] Earth and Space Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The high heat at Earth’s core is a combination of three factors. Select the correct three factors from the following choices. • residual heat from Earth’s formation • heat from the sun’s formation • frictional heating, caused by denser parts of the core moving toward the center • heat from the friction of the tectonic plates grinding together • residual heat from the impact with another planet in the formation of the moon • nuclear fission occurring within the inner core • decay of radioactive elements, such as uranium, in the core Is this image correctly labeled? Mantle Crust Inner core Outer core