Question

4) Answer the following questions on the basis of understanding the following
paragraph and the related studied concepts.

You must have heard of the ozone layer in our atmosphere. It protects us from the
harmful ultraviolet radiation which come from the sun. Ozone absorbs this radiation
and breaks down to oxygen. Oxygen is different from ozone. Can we call the
breaking down of ozone a chemical change? If ultraviolet radiation were not
absorbed by ozone, it would reach the earth’s surface and cause harm to us and
other life forms. Ozone acts as a natural shield against this radiation.

a) What is a chemical change? -1-

b) How is ozone layer useful to us? -1-

c) Pick an example of chemical change from the above passage -1-

d) Ozone acts as a -------------------against radiation.

Answer 1

ozone acts as a natural shield against radiation

Answer 2

Answer:

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but however it is over