coal - combustion reaction converts chemical energy into light and heat
wood - combustion reaction converts chemical energy into light and heat
petroleum - can be burned to release light and heat or changed into another form of chemical energy, such as gasoline
chemical batteries - store chemical energy to be changed into electricity
biomass - combustion reaction converts chemical energy into light and heat
natural gas - combustion reaction converts chemical energy into light and heat
food - digested to convert chemical energy into other forms of energy used by cells
cold packs - chemical energy is absorbed in a reaction
propane - burned to produce heat and light
hot packs - chemical reaction produces heat or thermal energy
photosynthesis changes solar energy into chemical energy
cellular respiration is a set of reactions that change chemical energy in glucose into chemical energy in ATP, a form our bodies can use