When we burn energy in our bodies, 90% of the energy is transformed into what?

  The average human, at rest, produces around 100 watts of power. This equates to around 2000 kcal of food energy, which is why your recommended daily intake of calories is around 2000 kcal.

i'd say that the moon rock is about 2.2 billion years old.

segmented body, an exoskeleton made from chitin, and joint appendages.