- "Mass is a property of matter " is not a useful statement here

- A spoon sometimes is made of metal
- Metal is a thermal / thermal energy conductor
- Hence, a metal spoon is a thermal conductor

- A hot substance is a source of heat
- Soup is a kind of substance
- So, hot soup is a source of heat

- Hot soup is a source of heat
- A metal spoon is placed in a pot of hot soup
- Hence, the hot soup will be a source of heat for the metal spoon

- A metal spoon is a thermal conductor
- The hot soup will be a source of heat for the metal spoon
- If a thermal conductor is exposed to a source of heat, then thermal conduction will make the thermal conductor become hot
- So, the metal spoon will be heated up by thermal conduction

Hence, the metal spoon will be heated up by thermal conduction
Q: Heat transfer is part of everyday life. Which of these examples involving heat transfer occurs mainly by conduction?
Context:
- A hot substance is a source of heat 
- A spoon sometimes is made of metal 
- Mass is a property of matter 
- A metal spoon is placed in a pot of hot soup 
- If a thermal conductor is exposed to a source of heat, then thermal conduction will make the thermal conductor become hot 
- Soup is a kind of substance 
- Metal is a thermal / thermal energy conductor