By definition, spontaneous combustion is a...

Question 1 / 270705eccef9ebacbc34ba4d46572

Question 1 of 270705eccef9ebacbc34ba4d46572

By definition, spontaneous combustion is a result of __________.

Question 1 of 27070

By definition, spontaneous combustion is a result of __________.

🔍 Key Concepts

• Spontaneous combustion – what does “spontaneous” really mean in fire science? • Difference between internal chemical heat build‑up and heat from outside sources • Common examples: oily rags, damp coal, hay bales – what is happening inside them before they ignite?

💭 Think About

• Ask yourself: if something is truly spontaneous, where must the heat that starts the fire be coming from? • Which choices describe heat coming from outside the material, and which describe heat generated inside the material? • Think about a pile of oily rags catching fire in a closed room with no heater or flame nearby – what process could cause that?

✅ Before You Answer

• Identify which options involve an external heat source versus no external heat source. • Make sure your choice matches the literal meaning of “spontaneous” = occurring by itself, without outside help. • Eliminate any choices that clearly require heat being supplied from outside the material.

Question 1 of 27070

By definition, spontaneous combustion is a result of __________.

an outside heat source heating a substance until it ignites

conduction of heat through a wall of material to the substance

chemical reactions within a substance

All of the above.

Question 1 / 270705eccef9ebacbc34ba4d46572

Question 1 of 270705eccef9ebacbc34ba4d46572

By definition, spontaneous combustion is a result of __________.

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Question 1 of 27070

By definition, spontaneous combustion is a result of __________.