Essay On Ozone Layer

The Ozone layer

The Ozone"Earth’s Natural Sun block"

• Introduction

The ozone is a crucial layer that surrounds our planet (the earth), and keeps us alive. It is known as the earth 's natural sunscreen. It blocks the devastating U.V radiation and prevents them from reaching distances beyond the mesosphere layer, whereas if the U.V made its way to the earth, it may result in deadly effects. In this report the history, structure and the effects of the industrial and human interference with this spectacular layer will be discussed.

• History of the ozone layer:

-It was first discovered by the French physicists Charles Fabry and Henri Buisson in 1913.

-Its properties were then discovered in detail by the British meteorologist G.M.B.Dobson, who had also

However, the high oxidizing power causes severe damages to the mucous and respiratory tissues in animals, and also tissues in plants, when its concentration is above 100 ppb.

• Physical properties:

• Ozone is one of the most constructive gases that serves to protect all the earth living organisms (plants, animals and humans) from the damaging effects of the ultraviolet radiation of the sun light. It succeeded to do that by the ability of absorbing the radiation in the UV region of the electromagnetic radiation with the wave length (220-290 nm), thus it prevents the harmful UV radiation from reaching the earth.

• Ozone color change with the change of the physical state , its color is blue and pale in the gaseous state , deep blue in the liquid state and violet to black in the solid state (crystals).

• The inorganic molecule that is defined as an allotrope of the O2 with the chemical formula O3, is more reactive (less stable) than the dioxide O2, thereby it is used in many applications.

• Ozone has a distinct strong smell which can be detected by many people even at the low concentration .Inhaling it cause people to have