Discuss why science cannot answer all questions.

Science cannot answer all questions because the answer the sientist had in mind was not in fact true which leads to the subject evolution, some say we came from apes and some others say we came from Adam and Eve (for christian sake), which scientists cannot stop arguing about it because they are christian. Therefor not all scientific questions can be answered.

Ten percent of energy is transferred from sun to the level indicated.

In fact it is not just nuclear fusion and fission that  can  transform  matter  (or mass)into energy. any time  energy  is produced, some small amount of  matter  or mass isconverted into energy.