A student half fills a jar with rice and tightens the jar’s lid. The student wants to use the jar of rice to model particle motion of a substance in any state of matter. Compare the amount of kinetic energy of particles in each state of matter

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.