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