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Natuurwetenskappe

Graad 8

Biodiversiteit: aanpassings en oorlewing

Module 26

Oorlewing: habitat

Hoekom vind ’n mens sekere plante en diere net in sekere gebiede?

Aktiwiteit: om inligting te evalueer

Werk in pare. Teken ‘n tabel met drie kolomme met elk van die volgende bo-aan:

PLANTE:

Plantnaam

Waar groei dit?

Waarom groei dit daar?

Bespreek die bostaande vraag en voltooi dan die tabel deur enige voorbeelde waaraan julle kan dink in te vul. Gebruik voorbeelde van wilde diere en plante in hulle natuurlike omgewing. Moenie troeteldiere, plaasdiere of tuinplante gebruik nie.

DIERE:

Diernaam

Waar tref ons dit aan?

Waarom tref ons dit daar aan?

Assessering van HABITATBESPREKING:

Kon jy sinvolle antwoorde uit die bespreking kry?

[LU 1.3]

Plakkaat: groepwerk 4 - 5 leerders

Beplan ’n plakkaat om die habitatte van die diere uit jou lys aan te toon. Kies twee uiteenlopende habitatte en probeer oorspronklik wees. Sluit ten minste drie diere by elke habitat in.

  • Gebruik tekeninge of prente. Versamel dit en bring dit klas toe om die opdrag te voltooi.

Kriteria:

  • Benader die opdrag as ’n stuk navorsing en sluit die volgende stappe in:
  • Beplan die ondersoek
  • Versamel die data
  • Formuleer en kommunikeer die bevinding
  • Formuleer ’n verklarende opskrif
  • Maak die plakkaat so kleurvol as moontlik
  • Gebruik groot teksletters
  • Sluit name van groeplede in
  • Verdeel take
  • Besluit wie gaan terugvoering gee

Assessering van PLAKKAAT:

Het jy konstruktief deelgeneem aan die groepaktiwiteit deur die ondersoek te beplan (1.1), data in te samel (1.2) en bevindinge te kommunikeer (1.3)?

[LU 1.1; 1.2; 1.3]

Oorlewing in ’n Habitat

Organismes leef in ’n natuurlike omgewing waar hulle kos, water en skuiling teen vyande kan kry.

Diere sal ook paarmaats wou aantref.

Sommige organismes het spesiale aanpassings vir al die aanslae uit die omgewing.

Hierdie AANPASSINGS is ’n strategie om te oorleef.

Elke organisme se HABITAT is sy plek waar hy lewe.

Elkeen is goed aangepas vir sy NIS – dit is soos sy plek en rol in sy omgewing.

Aktiwiteit: OM INLIGTING TE INTERPRETEER EN KENNIS TOE TE PAS

Bestudeer die volgende met OORLEWINGSTRATEGIE Ë soos getoon deur bekende tuinplante en diere. Verduidelik die doel van elke aanpassing.

Die sitrus swaelstert-skoenlapper se monddele suig die nektar op. Die skoenlapper het sterk Gewone Padda Rana temporia

vlerke.

Die harige ruspe word ’n mooi maar giftige skoenlapper. Die stekelrige hare op die ruspe beskerm dit.

Die roosboom het dorings en harde blare met skerp, kort punte. Ruspes eet van die blaarrande af.

Die verkleurmannetjie het groot oë wat afsonderlik van mekaar kan beweeg. Hy het vier tone – twee vorentoe en twee agtertoe.

Hy het ’n lang, krulstert met ’n sterk greep.

Dan kan hy natuurlik ook sy kleur verander.

Die sade van die sydis-sel vorm ’n sambreel-agtige pluimpie wat ver deur die wind versprei kan word.

Bestudeer die volgende sketse en voltooi die vraag by elkeen.

Die suikerbekkie

Watter twee aanpassings sien jy?

Die janfiskaal

Hoe is die voël aangepas?

Die hottentotsgot

Hoe is die hottentotsgot aangepas?

Assessering vir AANPASSINGS:

Kon jy die korrekte afleidings tov die aanpassings maak deur informasie in kategorieë te plaas en dit te interpreteer?

[LU 2.3; 2.4]

Assessering

LU 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.

Dit is bewys as die leerder:

1.1 ondersoeke kan beplan;

1.2 ondersoeke kan uitvoer en data kan insamel;

1.3 data kan evalueer en bevindinge kan kommunikeer.

LU 2

Wetenskaplike Kennis

Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Dit is bewys as die leerder:

2.1 sinvolle inligting kan onthou;

2.2 inligting in kategorieë kan plaas;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Oorlewing - habitat

Aktiwiteit: HABITAT-BESPREKING

  • Vra leerders om in pare hierdie bespreking te doen

Plakkaat: GROEPWERK 4-5 LEERDERS

  • Gee opdrag vooruit sodat beplanning en materiale versamel kan word

Aktiwiteit: OORLEWINGSTRATEGIEË

  • Knip-en-plak-aktiwiteit

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, Natuurwetenskappe graad 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11049/1.1
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