take a look at the U value of bricks ..
http://www.combustionresearch.com/Infra-鈥?/a>
if the density of an object is high the u-value is too..
things with air in it don't conduct like things with out air
if the water content is high in a brick its a better conductor of heat
if the brick is denser it conducts better...
Fired brick would have less water than unfired...
answer true
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