Final answer:
Four items considered as sources of chemical energy are ice cream, gasoline, fireworks, and logs for the fireplace, all of which store potential energy in chemical bonds that is released during combustion or digestion.
Step-by-step explanation:
Chemical energy is a form of potential energy stored in chemical bonds, which is released or transformed during chemical reactions. The four items among those listed that are considered primarily as sources of chemical energy are ice cream, gasoline, fireworks, and logs for the fireplace. As food, ice cream contains sugars and fats that, when digested, release chemical energy for our bodies to use. Gasoline, when combusted in an engine, releases its stored chemical potential energy as mechanical and heat energy. Fireworks, upon ignition, undergo rapid chemical reactions, releasing their chemical energy as light, heat, and sound. Lastly, logs are burned in a fireplace, converting their stored chemical potential energy into heat and light.