Chapter 9 Endangered Ecosystem.ppt

7/26/2019 Chapter 9 Endangered Ecosystem.ppt

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Chapter 9 Endangered

Ecosystem

9.1 Human Activities That Endanger An Ecosystem

ITeach Biology Form 4


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EcosystemHuman Activities That Endanger An Ecosystem

Human Activities Which

Threaten the Ecosystem

Excessive use of

fertilisers

Development and

industrialisation

Deforestation

Increase in the

number of motor

vehicles


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ITeach Biologi Tingkatan 4

Bab 9 Ekosistem Terancam

Aktiviti Manusia ang Membahayakan Ekosistem

Aktiviti Manusia ang

Membahayakan Ekosistem

Penggunaan baja

yang berlebihan

Pembangunan

dan perindustrian

Pembalakan

Peningkatanbilangan

kenderaan

bermotor


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The E!!ects o!"np#anned $eve#opment

and Mismanagement o!

the Ecosystem

Eutrophication

Climatic changes

Global arming

!oss of

biodiversity

Pollution

"lash flood

!andslides

#oil erosion

$hinning of o%one

layer


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%esan &embangunanTidak Terancang $an

'a#ah &engurusan

Ekosistem

Eutrofikasi

Perubahan cuaca

Pemanasan

global

&epupusan

biokepelbagaian

Pencemaran

'anjir kilat

$anah runtuh

(akisan tanah

Penipisan lapisan

o%on


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&o##ution

)oise pollution $hermal pollution

*ater pollution +ir pollution

( types o! po##ution


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&encemaran

Pencemaran bunyi Pencemaran terma

Pencemaran air Pencemaran udara

( )enis pencemaran


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'ource *! Air

&o##ution

Exhaust fumes from

vehicles,

'urning

"actories and

industries,

Air &o##ution





'umber

pencemaran

udara

+sap kenderaan

Pembakaran

&ilang dan industri

&encemaran "dara





Water &o##ution

'ources o! Water

&o##ution

Discharge of untreatedseage and domestic

aste into rivers,

Discharge of industrial

astes,

Discharge of agricultural

astes,

-il spillage

Cause Eutrophicatio

n

+lgal

bloom

+ high 'iochemical -xygen Demand .'-D/ value





&encemaran Air

'umber

Pembuangan air kumbahanyang tidak diraat dan sisa

domestik ke dalam sungai

Pembuangan sisa industri

Pembuangan sisa pertanian

$umpahan minyak

Menyebabkan Eutrofikasi Pertumbuhan alga

)ilai &eperluan -ksigen &imia .'-D/ yang tinggi





Therma# &o##ution

'ources o!

therma# po##ution

Glass buildings

Discharge of hot aterfrom factories0 electric

poer stations

Cause

+1uatic organisms

die

(igh '-D

value

$hermal pollution is the release of excessive heat into environment,

$he temperature in the surrounding area

increases





&encemaran Terma

&unca

'angunan kaca

Pembuangan air panasdari kilang dan stesen jana

kuasa

Menyebabkan

-rganisma akuatik mati

)ilai keperluan oksigen biokimia tinggi

Pembebasan haba yang berlebihan ke persekitaran,

#uhu persekitaran meningkat

Ch t 9 E d d





+oise &o##ution

'ource o! noise

po##ution

+ircrafts

$rains

E!!ects o! noise

po##ution

Depressio

n

(eadache

s

2nit or measurement3 decibel .d'/ unit

(igh blood pressure

Construction sites

4achines and e1uipment in factories

2lcers





&encemaran bunyi

&unca

&apal terbang

&eretapi

%esan

&emurunga

n

Pening kepala

2nit atau pengukuran3 unit desibel .d'/

$ekanan darah tinggi

$apak pembinaan

4esin dan peralatan kilang

2lser


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Ecosystem

9., The -reenhouse E!!ect And The Thinning *! The *one /ayer

%esan 0umah Hi)au $an &enipisan /apisan *on






Ecosystem

The -reenhouse E!!ect And The Thinning *! The *one /ayer

The -reenhouse E!!ect

It is an crucial natural process hich helps to regulateaverage temperature of the Earth,

Global arming 3 $he increase in average temperature of the Earth

because of too much greenhouse gases are trapped in atmosphere

5,$he Earth radiating heat back into space6,(eat is trapped on Earth by the

greenhouse gases



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Pemanasan global3 Peningkatan suhu purata 'umi disebabkan oleh

terlalu banyak gas7gas rumah hijau terperangkap di atmosfera,




%esan 0umah Hi)au

4erupakan proses semulajadi yang penting untuk membantumengaal suhu purata 'umi,

5,#inaran inframerah daripada matahari

dipantul kembali ke angkasa lepas,

6,(aba terperangkap di 'umi oleh gas7

gas rumah hijau,





EcosystemThe -reenhouse E!!ect And The Thinning *! The *one /ayer

Conseuentia# o!

-reenhouse E!!ect

$he rise in sea level

Decline in the yields of crops

and ater supplies

Global arming

Climatic change






Akibat %esan

0umah Hi)au

Peningkatan paras laut

Penurunan jumlah penghasilan

tanaman dan bekalan air

Pemanasan global

Perubahan cuaca






-%one layer absorbs harmful ultraviolet

rays and prevents them from reaching

Earth8s surface,The Thinning o! the

*one /ayer

Destruction of o%one gas cause o%one

layer become thinner,

Man2made po##utant burn a ho#e in the oone #ayer

Gas

C"C and (C"C

4ethyl bromide

Used in

+erosols0 refrigerants0

air conditioning

+gricultural pesticides






!apisan o%on menyerap sinaran

ultraungu yang berbahaya dan

menghalangnya daripada sampai kepermukaan 'umi&enipisan /apisan

*on

Pemusnahan gas o%on menyebabkan

lapisan o%on bertambah nipis

&encemaran yang di#akukan o#eh manusia

menyebabkan #ubang terbentuk pada #apisan oon

Gas

C"C dan (C"C

4etil bromida

Digunakan dalam

+erosol0 peti ais danpenghaa dingin

9acun pertanian



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The 3mpact o! -#oba# Warming and the Thinning

o! the *one /ayer on the Ecosystem

:arious ecosystems on

Earth is not in e1uilibrium

2ltraviolet disturb balance in

ecosystem and destroys

plankton in food chain

Extinction of certain

organisms



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%esan &emanasan -#oba# $an &enipisan /apisan

*on Terhadap A#am 'ekitar

Ekosistem bumi tidak

seimbang

2ltraungu mengganggu

keseimbangan ekosistem

dan memusnahkan plankton

dalam rantai makanan

&epupusan sesetengah

organisma


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Ecosystem

9.4 The 3mportance *! &roper Management *! $eve#opment

Activities And The Ecosystem%epentingan &engurusan ang Baik $a#am &embangunan

Aktiviti $an Ekosistem


Chapter 9 EndangeredTh 3 t *! & M t *!


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p g

EcosystemThe 3mportance *! &roper Management *!

$eve#opment Activities And The Ecosystem

2se reneable energy

Practice of biological control

'teps Taken To EnsureA Ba#anced and 'tab#e

Ecosystem

Preservation and conservation

Efficient use of energy

Education

2se of technology

Implementation of las



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%epentingan &engurusan ang Baik $a#am &embangunan Aktiviti $an Ekosistem

Penggunaan tenaga yang boleh

diperbaharui

+malan kaalan biologi

/angkah2#angkah ang$iambi# "ntuk

Memastikan Ekosistem

'eimbang $an 'tabi#

4emelihara dan memulihara

ekosistem

Penggunaan tenaga yang

cekap

Pendidikan

Penggunaan teknologi

Penguatkuasaan undang7

undang


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i 7 $each

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Chapter 9 Endangered Ecosystem.ppt