Q3.6

Stars produce new elements by nuclear fusion, which occurs at very high temperatures in their cores.
At first, hydrogen nuclei fuse to form helium nuclei.
As the hydrogen in the core begins to run out, helium nuclei start to fuse to make heavier elements.
This process continues in stages, forming elements up to iron.
In very massive stars, the star can explode as a supernova.
These supernovae create elements that are heavier than iron.