9.2—Reactions take place only when collisions have sufficient energy, known as the activation energy

Understand that reactions take place only when collisions have sufficient energy, known as the activation energy.

Use —reactions take place only when collisions have sufficient energy, known as the activation energy to connect the rule to the data and decision in the question.

This matters because —reactions take place only when collisions have sufficient energy, known as the activation energy determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —reactions take place only when collisions have sufficient energy, known as the activation energy to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Reactions take place only when collisions have sufficient energy, known as the activation energy is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.