Why are fossil fuels a rich source of energy? fossil fuels require activation energy to burn
heat is released when fossil fuels combine with oxygen
fossil fuels are millions of years old
carbon dioxide is released when fossil fuels combine with oxygen

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.