+**Activation Energy** is the minimum energy required for a [Chemical Reaction](/wiki/chemical_reaction) to proceed. It represents an energetic barrier that reactant molecules must overcome to transform into products. A higher activation energy means a slower reaction, unless a [Catalyst](/wiki/catalyst) is present to lower this critical threshold.
+## See also
+- [Reaction Rate](/wiki/reaction_rate)
+- [Catalysis](/wiki/catalysis)
+- [Transition State](/wiki/transition_state)
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