- An ice cube melting after being left out on the table is endothermic because the ice cube absorbs heat from its surroundings to change from solid to liquid.
- Cooking an egg in a frying pan is endothermic because the egg absorbs thermal energy from the pan to undergo chemical changes and solidify.
- Burning a match is exothermic because the chemical reaction releases heat and light into the surroundings.
- The human body using energy from food digestion is exothermic because metabolic processes release energy as heat to sustain bodily functions.
- Morning dew forming on grass and plants is exothermic because water vapor releases heat when it condenses into liquid droplets.
- Dynamite exploding in the destruction of a building is exothermic because the rapid chemical reaction releases a large amount of energy as heat, light, and sound.
- Making ice cubes is exothermic because water releases heat to its surroundings as it freezes into solid ice.
- A puddle of water evaporating is endothermic because water molecules absorb heat from the environment to transition from liquid to gas.
- Plants making sugar through photosynthesis is endothermic because plants absorb solar energy to convert carbon dioxide and water into glucose and oxygen.
- Nuclear fission is exothermic because splitting heavy atomic nuclei releases a tremendous amount of energy in the form of heat and radiation.
- Converting frost to water vapor is endothermic because solid frost must absorb energy from its surroundings to sublimate directly into gas.
- Melting solid sugar cubes is endothermic because the sugar absorbs heat from its surroundings to break intermolecular bonds and become liquid.
Parent Tip: Review the logic above to help your child master the concept of endothermic and exothermic reactions worksheet.
