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1.7 Om die sprinkaan en sy oorlewingsvermoë te ondersoek en te

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Natuurwetenskappe

Lewe en lewenswyse

Opvoeders afdeling

Memorandum

  • Sprinkaan:
  • Nee, ja, 6

1. Groot: 2

Klein: 3

1. Groot: 2

Klein: 3

2. Drie

3. Vier

4. Nee. Voorvlerke hard en leeragtig, agterstes sag en kan oopvou, kry groot oppervlak

5. Plastiekagtig, hard

6. Voelers

7. Nee. Daar is asemhalingsopeninge op elke segment van die agterlyf.

8. Ja. Monddele sit onder aan kop. Snyvlakke, en voelers.

9. 6 Pote.

10. Nee. Die agterpote is sterker.

11. Nee. Die wyfie en mannetjie lyk verskillend. By die sprinkaan het die wyfie ‘n lêboor, by die mannetjie is ‘n koppelingsorgaan.

12. Beskerming: harde uitwendige skelet, maar kan met voelers voel. Verloor nie water nie, kan sonder water klaarkom. Kan goed beweeg: loop, soms spring en vlieg. Kan kos soek weens beweegvermoë, kan sien, goeie monddele.

13. Leerder moet van ‘n werklike dier afteken, indien moontlik.

Lewensiklus: volwassene, eiers, larwe, papie

Opdrag 3:

  • Afhanklikheid van water: kan in droë toestande oorleef, kan lewe in omgewings waar daar nie sterk kompetisie van ander diere is nie. Eksoskelet verhoed waterverlies, eet plante wat voldoende water bevat.
  • Verkryging van voedsel: sprinkaan kan vinnig en ver beweeg om voedsel te soek . Eiers kan droë toestande oorleef en broei uit as die grond vogtig word (reën) en daar dus groen plante gaan wees.
  • Insekte met volledige metamorfose: oorleef as papie, die eiers broei uit wanneer voedsel beskikbaar is.
  • Asemhaling: die buisies in die liggaam vervoer die gasse en bly vogtig (droog nie maklik uit soos by die erdwurm nie.
  • Sintuie en kommunikasie: ruik en voel met antenne; het ‘n oordrom op eerste segment van die agterlyf, maak geraas deur die agterpote teen die growwe vlerke te skuur (sprinkaan; ander insekte doen dit anders, maar die belangrike is dat hulle kan kommunikeer).

Leerder afdeling

Inhoud

Aktiwiteit: om die sprinkaan en sy oorlewingsvermoë te ondersoek en te beskryf [lu 1.1, lu 1.2, lu 2.3, lu 2.4]

Die sprinkaan

Die sprinkaan behoort tot die grootste groep in die diereryk, naamlik die insekte .

Wat weet jy al van hierdie groep?

  • Werwelkolom: ja of nee?_____________________________________________
  • Pote: gelit of nie?______________________________________________
  • Getal pote _____________________________________________________

Ondersoek : Vang ‘n paar verskillende insekte en bring hulle saam klas toe. Vorm groepies van twee of drie en bestudeer die insek in die groep waarvan die liggaamsdele maklik onderskei kan word. ‘n Sprinkaan of kriek werk goed. Beantwoord die volgende vrae (probeer jou bes om goeie antwoorde te gee sodat jy ‘n goeie punt kan kry):

1. ‘n Insek het groot sowel as klein oë. Hoeveel oë tel jy?

  • Groot: ___________________________________
  • Klein: ___________________________________

2. In hoeveel hoofdele sou jy die liggaam verdeel? _______________________

3. Hoeveel vlerke het die insek? As die vlerke teen die liggaam gevou is, lig hulle

op en kyk versigtig. ______________________________________

4. Is al die vlerke dieselfde? ___________________________________________

Beskryf. ____________________________________________________________

Questions & Answers

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Lambiv
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appreciation
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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,
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Shukri Reply
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AI-Robot
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)
Kelo
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Shukri
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Shukri Reply
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
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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.
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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 .
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Answer
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c
Jabir
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
Gsbwnw Reply
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
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types of unemployment
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What is the difference between perfect competition and monopolistic competition?
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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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