Question

some Science k
nowledge for class 8

Answer 1

hello friend
Some common science knowledge
Depletion of ozone layer is due to the harmful chemicals ie we all know chlorofluorocarbons ( CFC ) which are widely used in the refrigerator and air conditioner as a coolant , also in fire extinguisher and in aerosol sprayers....
chlorofluorocarbons are released into the air and react with ozone gas present in the ozone layer and destroy it gradually.....due to this the ozone layer has become thinner in the upper atmosphere allowing most of the harmful ultra violet rays to pass through it to earth ...
Ultraviolet rays can cause many human diseases such as skin cancer , cataract ...etc...
this also damage our immune system by lowering the body s' resistance to diseases.....
Hope it helps you
PLZ MARK IT AS A BRAINLIEST

Answer 2

Class 8th Acience is very simple and easy,It is to recall what u have learned in earlier classes for preparing you for your 9th and 10th. If u want to score good pay attention in class and answer questions to teacher.And most important maintain your n/b and complete work on time.If you are going to accomplish these small tactics you can easily gain highest marks.I usually got full marks or near about it by just following these rules....
Best of Luck For Your 8th!✌✌