Here's why:
* Composition: Newspaper is made of paper, which is primarily cellulose fibers. Cellulose is a natural polymer and a good conductor of heat.
* Structure: The fibers in paper are interwoven, but they leave air gaps. While air is a good insulator, the gaps in newspaper are not sufficient to create a significant barrier to heat transfer.
* Moisture: Newspaper readily absorbs moisture. Water is a good conductor of heat, so damp newspaper would be even less effective as an insulator.
Better Insulators:
Materials that are good insulators typically have:
* Low thermal conductivity: They don't transfer heat easily.
* Porous structure: They have many air pockets that trap heat.
* Low moisture content: They don't absorb water.
Examples of good insulators include:
* Fiberglass: Commonly used in homes and buildings.
* Foam insulation: Found in many appliances and building materials.
* Wool: A natural fiber that traps air.
In summary, newspaper is not a good insulator due to its composition, structure, and ability to absorb moisture.