<< Chapter < Page Chapter >> Page >

In die ontwikkelende dele van die wêreld is dit egter ‘n ander storie. Baie lewens word geëis en omtrent alle konstruksies word vernietig. Geboue is op die goedkoopste manier gebou en verkrummel eenvoudig onder die krag van n aardbewing. Duisende word dakloos, honger en beseer gelaat. Die infrastruktuur is van so ‘n aard dat hulp nie betyds by die mense kan uitkom nie. Lyke begin ontbind en die drinkwater word besoedel. Dit veroorsaak weer siektes wat die dodetal verhoog.

Aktiwiteit 4:

Om die redes te bespreek waarom mense in gebiede woon waar aardbewings voorkom

[lu 2.2]

1. Hoekom besluit mense om te woon in gebiede waar daar aardbewings is? Dink goed hieroor na en gee dan jou eie opinie.

2. Waar sal jy wegkruip as ‘n aardbewing jou omgewing tref?

4. Voorkomende maatreëls: die bestuur van gevare en gevaarvermindering

Kan aardbewings voorspel word?

Ongelukkig is dit nie honderd persent moontlik nie. Tog word intense studies van die aardkors gedoen en sensitiewe instrumente verklik die kleinste beweging wat in die aardkors voorkom.

Wetenskaplikes gebruik spesiale metodes en toerusting, byvoorbeeld seismograwe, om aardbewings te bestudeer en te probeer voorspel. Seismograwe kan enige beweging van die aardkors waarneem. Indien voorskokke voorkom, kan wetenskaplikes bewus word van aktiwiteite in die aardkors en waarskuwings kan betyds uitgereik word. Sekere satelliete is ook in staat om bewegings van die aardkors waar te neem en sodoende kan waarskuwings ook uitgereik word.

Ander “onwetenskaplike“ metodes van waarskuwing kan ook nuttig wees om moontlike aardbewings te voorspel, byvoorbeeld:

  • die verandering in die watervlak van ondergrondse bronne, soos dié van ‘n waterput;
  • die skielike vreemde gedrag van diere.

Die moontlike suksesvolle voorspelling van aardbewings help dat waarskuwings gegee kan word sodat ontruiming betyds kan geskied. Sodoende word lewensverliese beperk. Of almal na die waarskuwings luister, is natuurlik ‘n ope vraag.

Onthou net – alle aardbewings kan nie voorspel word nie , want dit gebeur te vinnig – sonder enige voorskokke of voortekens.

Aktiwiteit 5:

Om ‘n lys van noodmaatreëls in geval van ‘n aardbewing op te stel

[lu 2.3]

Verbeel jou jy bly in ‘n area waar daar baie aardbewings voorkom (‘n swak plek in die aardkors).

Stel ‘n lys met noodmaatreëls op wat gedoen kan word voor, tydens en na ‘n aardbewing voorgekom het.

Teken ‘n wêreldkaart af en dui op jou kaart slegs die areas aan waar aardbewings voorkom. Kleur dit dan rooi in.

Assessering

Leeruitkomstes(LUs)
LU 2
AARDRYKSKUNDIGE KENNIS EN BEGRIPDie leerder is in staat om aardrykskundige en omgewingskennis en -begrip te toon.
Assesseringstandaarde(ASe)
Dit is duidelik wanneer die leerder:
2.1 beskryf en verduidelik hoe natuurgevare soos vulkane, aardbewings en oorstromings plaasvind, en die uitwerking daarvan op menselewens en op sosio-ekonomiese bedrywighede [mense en plekke];2.2 ondersoek en verduidelik waarom sommige mense meer as ander aan natuurgevare blootgestel is [mense en hulpbronne];2.3 identifiseer hoe risiko’s en natuurgevare hanteer kan word [mense en omgewing].

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Aardrykskunde graad 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Aardrykskunde graad 7' conversation and receive update notifications?

Ask