SMK KULAI BESAR

SCIENCE FORM 1NAME : THULSIRAM A/L KUMARASWARAN

CLASS : 1 RK 2

TEACHER’S NAME : TEACHER NUR HIDAYU BINTI MOHD NAIM

THINNING OF THE OZONE LAYER

INTRODUCTION OF THE OZONE LAYER

INTRODUCTION OF THE OZONE

LAYER

THE OZONE LAYER IS A REGION IN THE STRATOSPHERE,

BETWEEN SEVENTEEN AND TWENTY-FIVE KILOMETRE ABOVE

THE EARTH ‘S SURFACE

THE OZONE LAYER CONTAINS HIGH

CONCENTRATION OF OZONE MOLECULES ,

O3 THAT ABSORB ULTRAVIOLET

RADIATION AND SHIELD ORGANISMS FROM ITS DAMAGING EFFECTS

THINNING OF THE OZONE LAYER

THINNING OF THE OZONE LAYER

THE THINNING OF THE OZONE

LAYER IS MAINLY DUE TO CHLOROFLURO

CARBONS (CFC).

ONCE IN THE STARTOSPHERE,

CFC ARE BROKEN DOWN

BY ULTRAVIOLET

RAYS.

THESE CHLORINE

RADICALS BRAKE DOWN OZONE

MOLECLUES , O3 IN A CHAIN REACTION.

AS A RESULT , THE HIGHLY REACTIVE CHLORINE

RADICALS ( CI ) ARE RELEASE.

THE EFFECTS OF OZONE DEPLETION

THE EFFECTS

OF OZONE DEPLETION

EXCESSIVE ENTERING OF ULTRAVIOLET RADIATION TO THE EARTH ‘S

SURFACE

LEAD TO HIGHER RISK OF SKIN

CANCER , CATARACTS AND

SUNBURNS DUE TO PROLONGED

EXPOSURE TO ULTRAVIOLET RADIATION

REDUCE THE NUTRIENT

CONTENT AND CROP YIELDS DUE TO ULTRAVIOLET

RADIATION

LEAD TO THE INCREASE OF THE

EARTH ‘S TEMPERATURE

THE PICTURES OF THE OZONE LAYER

UV protection by the Ozone Layer

Layers of the Atmosphere

The Ozone Layer

MAN-MADE POLLUTATS BURN AHOLE IN THE AZONE LAYER

CFC and HCFC Aerosols,refrigerants,air-conditioning

HalonsAgriculturul pesticidesMethly bromide

Extinguishers

THE THINNING OF THE OZONE LAYER HAVE SOMETHING IN COMMON WITH

GREENHOUSE EFFECTS

The picture in the above slide is about iceberg which is a very huge ice that contain most of the sea water.If there is a hole in the ozone layer than the iceberg will melt and will cause this:

WORDS HARD TO UNDERSTAND

OZONE HOLE

• A term invented to discribe a region of a very low ozone concentration above the antartic that appears and disappears with each austral (southern hemisphere) summer.

CLOROFLUOROCARBON (CFC)

• A family of compounds consisting of carbon,fluorine and chlorine.

ULTRAVIOLET RADIATION• A FORM OF ELECTROMAGNETIC RADIATION WITH

WAVELENGTHS JUST LESS THAN THOSE OF VISIBLE LIGHT ( FOUR TO FOUR HUNDRED NANOMETERS , OR BILLIONTHS OF A METER )

RADIATION

• ENERGY TRANSMITTED IN THE FORM OF ELECTROMAGNETIC WAVES OR SUBATOMIC PARTICLES

QUESTIONS & ANSWERS

1.What is the meaning of ozone hole?A term invented to discribe a region of a very low ozone concentration above the antartic that appears and disappears with each austral (southern hemisphere) summer.

2.What is the meaning of clorofluorocarbon?A family of compounds consisting of carbon,fluorine and chlorine.

3.What is the meaning of ultraviolet radiation?A form of electromacnetic radiation with wavelengths just less than those of visible light ( FOUR TO FOUR HUNDRED NANOMETERS , OR BILLIONTHS OF A METER )

4.What is the meaning of radiation?Enegy transmitted in the form of electromacnetic waves or subatomic particles.

THANK YOUFROM ,

Thulsiram