As ‘n mens na die aardbol kyk, is die Noordpool bo en die Suidpool is onder. Die noordpoolgebied word ook Arktika, en die suidpoolgebied word ook die Antarktika genoem. Dit is van die koudste dele in die hele wêreld en baie dele is die hele jaar met ys bedek.
Soorte ys
Ys wat op land vorm, word ysdekke genoem.
Ysriviere wat in die berge vorm en stadig deur die land na die see beweeg, word gletsers genoem.
Drywende ys wat op die see vorm, word pakys genoem.
Soos die aarde rondom die son wentel, verander die weer in patrone van seisoene. Gedurende die warm maande van die somer bereik meer sonligenergie die aarde as in die koue wintermaande. Hoe nader aan die pole ‘n mens woon, hoe duideliker is die verandering. Baie plante en diere se leefwyse is volgens die seisoene aangepas.
Herfs
Gedurende die herfs begin baie diertjies gereed maak vir die winter wanneer dit vir sommige diere moeilik is om kos te vind. Hulle maak dus kos bymekaar en bêre dit op ‘n veilige plek. Sommige voëls migreer na warmer dele van die wêreld.
Sommige bome verloor hulle blare in die herfs.
Winter
Die meeste diere se pels begin dikker word om aan te pas by die winterkoue. Hulle het net ‘n paar dinge nodig om die winter te oorleef, nl. kos, skuiling en water. Sommige diere eet baie kos net voor die ergste winterkoue en gaan slaap dan om energie te bespaar. Ons sê hulle hiberneer. Jy kan voëls in jou tuin help om te oorleef deur vir hulle kossies op ‘n voertafel te gee.
Die bome wat hulle blare verloor het, bewaar die nuwe blaartjies in die botsels vir die volgende jaar.
Lente
Die bloeisels en botsels is nou oral te sien wanneer nuwe blaartjies en blomme te voorskyn kom. Diertjies begin nou weer aktief raak en maak hulle skuilings gereed, indien daar dalk kleintjies gaan kom. Diere wat gehiberneer het, word nou wakker. Die warmte van die lente en die lentereën laat die grassies weer groei vir die diere om te eet.
Die voëls wat migreer het, kom nou terug en begin nessies bou vir die kleintjies. Wanneer die eiertjies in die laat lente uitbroei, sal daar genoeg insekte vir hulle wees om te eet.
Somer
Plante groei nou vinnig, want daar is baie sonlig. Diere soek skuiling in die skaduwee as dit te warm word. Baie diere kry nou kleintjies wat opgepas of versorg moet word. Diere soek water om koel te bly.
Hou ‘n uitstalling van elke seisoen in julle klas. Bring enigiets skool toe wat met ‘n spesifieke seisoen te doen het.
Assessering
LEERUITKOMS 1:WETENSKAPLIKE ONDERSOEK
Die leerder is in staat om met selfvertroue op weetgierigheid oor natuurlike verskynsels te reageer, en om binne die konteks van wetenskap, tegnologie en die omgewing verbande te ondersoek en probleme op te los.
Assesseringstandaard
Dis duidelik wanneer die leerder:
1.3 data evalueer en bevindinge kommunikeer.
Memorandum
Mnr. Breinsel:
Hoekom is dit so koud by die pole?Antwoord:
Wanneer die son op die aarde se middellyn skyn, is al die sonstrale bymekaar en daarom is dit so warm daar. Soos die aarde na bo en onder ‘n bol vorm, versprei die sonstrale oor ‘n wyer area, dus raak die sonstrale swakker en dus is die pole koud.
Mnr. Breinsel:
Hoe vorm ‘n ysberg?
maak vir jouself een om te kyk watter groot deel onder die water is en watter deel bo uitsteek. watter gevaar hou dit vir skepe in? watter skip het so gesink in 1912?Antwoord:
Maak ‘n plastieksakkie vol water en vries dit. Haal die bevrore ys uit die sakkie en sit dit ‘n bak vol water. Kyk nou watter groot deel bly onder die water!
Groot dele van die ys van ysdekke en gletsers breek af en dryf op die see, maar soos hulle dieper na die warmer see toe dryf, smelt dit en breek op, maar sommige ysberge kan tot drie jaar neem om te smelt.
Titanic
Questions & Answers
What are the factors that affect demand for a commodity
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
When MP₁ becomes negative, TP start to decline.
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Economic growth as an increase in the production and consumption of goods and services within an economy.but
Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has
The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50.
A,Calculate quantities of x and y which maximize utility.
B,Calculate value of Lagrange multiplier.
C,Calculate quantities of X and Y consumed with a given price.
D,alculate optimum level of output .
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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