Answer :
Final answer:
Fiberglass insulation primarily prevents heat loss through conduction, convection, and radiation. Evaporation is not a mechanism involved in heat loss in the context of insulation. Therefore, the correct answer to the question is evaporation.
Explanation:
Understanding Heat Loss and Insulation
Fiberglass insulation is designed to trap layers of air, preventing heat loss through various methods. The three primary mechanisms of heat transfer are:
- Conduction: This occurs when heat is transferred through direct contact of materials. For example, if one side of a metal rod is heated, the heat will travel through the rod to the cooler end.
- Convection: This is the transfer of heat through the movement of fluids (liquids or gases). In the case of insulation, trapped air cannot circulate, reducing heat loss through this process.
- Radiation: This is the transfer of heat through electromagnetic waves. Insulation can block radiation by reflecting heat back into the home or building.
However, evaporation does not contribute to heat loss in the same way as conduction, convection, or radiation. Instead, evaporation is a process where liquid turns into vapor, absorbing heat from the environment, such as in sweating or drying clothes.
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