Final answer:
An endothermic reaction absorbs heat, while an exothermic reaction releases heat.
Step-by-step explanation:
An endothermic reaction is a chemical reaction that absorbs heat from its surroundings. In contrast, an exothermic reaction is a chemical reaction that releases heat to its surroundings. This means that in an endothermic reaction, energy is being taken in, while in an exothermic reaction, energy is being given off.
For example, the process of photosynthesis in plants is an endothermic reaction because it absorbs energy from the sun to convert carbon dioxide and water into glucose and oxygen. On the other hand, the burning of wood is an exothermic reaction because it releases energy in the form of heat and light.
Key takeaway: Endothermic reactions absorb heat from the surroundings, while exothermic reactions release heat to the surroundings.
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