Question

Identify and mark the physical changes with (P) and chemical changes with (C).
(a) The parts of a bicycle change colour as it rusts.
(b) Mixing salt and pepper.
(c) Baking cookies
(d) A piece of metal is bent in half

(e) Chocolate syrup is dissolved in milk​

:-)

Answer 1

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. ... The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million.

Yoo !!

GM

My ears are gonna blast bcz of construction work here !!

( ꈍᴗꈍ)