diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5.md
index d7edf4ff..04f391e3 100644
--- a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5.md	
+++ b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5.md	
@@ -13,4 +13,5 @@ Classifying Reactors
 2. Moderator material
 3. Coolant
 4. Generation (I-IV)
-5. Use
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+5. Use
+Heat is created from fission. Kinetic energy from the decay products moving around is kind of what we see as "temperature".
\ No newline at end of file