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In die volgende leereenheid oor vulkane sal jy op die kaart sien dat aardbewings en vulkane op dieselfde plekke voorkom.

Aktiwiteit 2:

Om op ‘n wêreldkaart die areas aan te dui waar aardbewings voorkom

[lu 2.1]

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

2. Die uitwerking (gevolge) van aardbewings op mense se lewens en hul sosio-ekonomiese aktiwiteite

Lees die meegaande tydskrifartikel sorgvuldig deur.

Jy loop so ewe rustig in ‘n straat in jou stad of dorp en skielik begin die grond om jou golf soos ‘n dam waarin ‘n klip gegooi is.

‘n Vreeslike dreuning, byna soos ‘n weeklaag, styg van die aarde uit op. Om jou tuimel die geboue soos kaarthuise inmekaar, en voor jou bars die teerstrate oop soos lang repe sagte, geskeurde karton.

Spoorlyne buig en skeur, brûe stort ineen, damwalle breek. Mense en motors val in die grootste skeure. Dit gaan weer toe, en hulle verdwyn vir altyd. Oral stort bakstene, betonblokke, balke en pilare neer op mense, wat heen en weer skarrel en skuilplek soek wat daar nie is nie.

Brande breek uit omdat elektriese kabels en gaspype afgebreek word. Water stroom uit gebarste pype. Vensters se ruite het verbrokkel tot vlymskerp skerwe tussen die rommel om die ellende nog erger te maak. Alleraakligste natuurramp! Verskrikking soos die mens hom van die vroegste tye af ken. ‘n Aardbewing!

Huisgenoot, Jongspan , 21 Mei 1987.

‘n Aardbewing soos dié is ‘n baie ernstige ramp, maar gelukkig is almal nie so intens nie. Daar is omtrent elke 30 sekondes ‘n trilling in die aardkors, maar slegs 500 per jaar word regtig gevoel. Gelukkig is dit slegs ‘n paar wat af en toe baie skade aanrig en duisende lewens eis.

Aktiwiteit 3:

Om die gevolge van aardbewings te bespreek

[lu 2.1, 2.2]

1. Lees die tydskrifartikel sorgvuldig deur. Bespreek in groepe die gevolge wat aardbewings het op:

a) Die mens

b) Die natuur

2. Versamel foto’s, prentjies en uitknipsels van aardbewings. Bring dit na jou klaskamer en hou ‘n bespreking. Vul jou aantekeninge daarmee aan.

3. Lees die volgende paragraaf oor Tsoenami’s. Versamel kaarte, foto’s en ekstra inligting oor die uiters vernietigende tsoenami wat op 26 Desember 2004 in Suid-Asië voorgekom het. Skryf ‘n volledige verslag daaroor.

Tsoenami – nog ‘n gevolg van aardbewings !

As die rotslae op die oseaanvloer skielik beweeg, word die oorliggende seewater ook beïnvloed en ‘n golf ontstaan in die see wat teen 800 km per uur kan beweeg. Sodra die golf die vlakker baaie van kusgebiede nader, dam dit hoër op en kan tussen 30 — 60 meter hoog wees. Dit rig baie ernstige verwoesting aan omdat hawens en dorpe langs die kus oorstroom en verwoes kan word.

3. Hoekom sommige mense ‘n hoër risiko as ander is

As jy kyk na die wêreldkaart (figuur 8 op p. 34) waarop die aardplate aangedui word, sal jy sien dat van die digsbevolkte areas van die wêreld op van hierdie verskuiwingslyne voorkom. Geweldige lewensverlies kan dus voorkom, indien ‘n aardbewing sou voorkom

In ontwikkelde lande soos Europa, die VSA en Japan kan ‘n aardbewing nog redelik hanteer word en verliese kan geminimaliseer word. Geboue, paaie en brûe word spesiaal ontwerp en gebou om aardbewings te kan trotseer. Hierdie lande se infrastruktuur is uiters goed ontwikkel en daar bestaan doeltreffende gesondheidsorg- en mediese dienste wat onmiddellik beskikbaar is in noodtoestande.

Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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Source:  OpenStax, Aardrykskunde graad 7. OpenStax CNX. Sep 09, 2009 Download for free at http://cnx.org/content/col11020/1.1
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