Question

Answer the following 8 th class Science questions. Best answer will be marked as brainliest.

Answer 1

1. Cotton would be more appropriate as it absorbe more sweeat
3.As plastic melts when contect to heat
4. As during summer polycot reflect the sun rays and during winter it absorb heat.
5. As poly relaxed the brain nerves

Answer 2

1 neha wore appropriate fabric as cotton absorbs sweat easily whereas synthetic fibres do not
2 travel suitcases are made synthetic because synthetic fibres are stronger than natural fibres

3 The crack is caused by differential thermal expansion. The part of the glass that the boiling water touches first expands due to the heat, but the heat doesn't conduct through the glass quickly so there is stress between the expanded inside of the glass and unexpanded outside of the glass.

4 as polycot is mixture of polyseter and cotton it is durable, easy to maintain and absorbs sweat . if pure cotton cloth is taken it needs much care and is expensive

5 as polyfill pillow are made up of synthetic fibres that are durable ,easy to wash and laws expensive whereas one cannot wash a cotton fill pillow and it needs much care and is expensive