Woolens create a barrier to this and allow the body heat to stay in closer to the skin.
How do woolen clothes keep us warm in winter.
Wool is a poor conductor of heat.
So cotton clothes do not prevent heat coming out of our body.
Woolen clothes keep us warm in winter 1 wool absorbs moisture up to one third its weight.
Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.
Cotton clothes are thin and do not have space in which air can be trapped.
People have been wearing woolen clothing for years in the winter months.
For instance if you put on a blanket it is trapping our body heat then the body heat bounces of the blanket and hits us that s how we keep warm.
The clothes warm us up by trapping out body heat.
One is that wool is a bad conductor if heat.
Discussion in cbse class 7 science help started by g mahesh nov 7 2013.
Cotton clothes are thin and do not have spaces in their fabrics through which air can be trapped to keep us warm.
The woolen clothes keep us warm for two reasons.
This air prevents the flow of heat from our body to the cold surroundings.
The wool fibres trap the air in between them.
2 the fleece or hair that cover us keeps us very warm.
Thus cotton clothes do not prevent heat coming out of our body.
Woolen clothes keeps people warm in winters because the air gets trapped inside.