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