Snow is more heat insulating than ice,because

Under steady state,the temperature of a body

$Assertion :$ Woolen clothes keep the body warm in winter.
$Reason :$ Air is a bad conductor of heat.

Two thin blankets keep more warmth than one blanket of thickness equal to these two. The reason is

$Assertion:$ Two thin blankets put together are warmer than a single blanket of double the thickness.
$Reason:$ Thickness increases because of the air layer enclosed between the two blankets.

$A$ thin paper cup filled with water does not catch fire when placed over a flame. This is because