🔍 Key Concepts

• Auto-ignition temperature vs. flash point vs. fire point • What role a spark or flame plays in starting combustion • Difference between starting to give off vapors and self-igniting

💭 Think About

• Which choice talks about a fuel catching fire by itself just from being hot enough, without any outside flame or spark? • Which choice sounds more like the point where fuel starts to evaporate and give off vapors, rather than actually igniting on its own? • Is there any option that describes a condition that can continue burning but still needed an initial ignition source?

✅ Before You Answer

• Identify the option that clearly says no external ignition source (no spark/flame) is needed. • Eliminate any options that only describe vapor production or continuing to burn after being lit rather than self-ignition. • Watch for words like explode, which may describe a different concept from auto-ignition temperature.