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Natuurwetenskappe

Lewe en lewenswyse

Opvoeders afdeling

Memorandum

  • Die tuinslak
  • Seekat en mossel
  • Spiervoet
  • twee paar voelers en twee oë
  • Die slak beweeg met golfbewegings in die spiervoet.
  • Die mond is T-vormig, aan die onderkant van die kop.

Opdragte:

1. Die plante na-aan die grondoppervlak sou waarskynlik welig groei. Die diere wat van slakke leef, soos honderdpote, voëls en muise, sou moontlik ander weivelde soek.

2.

Erdwurm Ronde langwerpige liggaam maak dit moontlik om gate in grond te grawe, plantreste in te dra en saam met grond te eet Leef in vogtige grond om vel vogtig te hou Stelsel van buisies waarmee die hoeveelheid water wat opgeneem en afgegee word, beheer word
Sprinkaan Kan beweeg om voedsel te soek. Bytende monddele om plantmateriaal fyn te sny Buisies vertak in liggaam, voorsien 'n vogtige gaswis-selingsoppervlak Uitwendige skelet verhoed waterverlies, kry vog saam met plantmateriaal in
Spinnekop ens. Leerders maak bloot 'n opsomming van inligting in teks.
Krap
Slak

3. Navorsingsopdrag: assesseer in terme van die raamwerk wat in die module verskaf word.

Leerder afdeling

Inhoud

Aktiwiteit: om die tuinslak te ondersoek en die aanpassing van enkele invertebrate ten opsigte van oorlewing te vergelyk [lu 1.1, lu 1.2, lu 1.3, lu 2.3, lu 2.4]

Die tuinslak

Die slak behoort tot die groep weekdiere of Mollusca . Kan jy nog onthou watter ander diere aan hierdie groep behoort?

Die _____________________________ en ________________________________

Jy sal dit nie moeilik vind om ‘n tuinslak in die hande te kry nie. Kyk na sy uitwendige bou en probeer om die volgende vrae te beantwoord:

Die grootste deel van die liggaam bestaan uit ‘n ______________________________ -voet.

Aan die kop is twee ___________________________________ en twee ____________________________________________________________________

Sit die slak op ‘n glasplaat neer en wanneer hy begin beweeg, kyk van onder af deur die glas en beskryf wat jy sien (hoe hy beweeg).

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Kan jy sy mond sien? Beskryf. ___________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_______________________________________________________________________________________________________________________________________________________________________________________________________________

Lig die slak op en probeer om langs die liggaam in die skulp in te kyk. Kan jy ‘n opening sien? Dit is die asemhalingsopening.

Questions & Answers

if three forces F1.f2 .f3 act at a point on a Cartesian plane in the daigram .....so if the question says write down the x and y components ..... I really don't understand
Syamthanda Reply
hey , can you please explain oxidation reaction & redox ?
Boitumelo Reply
hey , can you please explain oxidation reaction and redox ?
Boitumelo
for grade 12 or grade 11?
Sibulele
the value of V1 and V2
Tumelo Reply
advantages of electrons in a circuit
Rethabile Reply
we're do you find electromagnetism past papers
Ntombifuthi
what a normal force
Tholulwazi Reply
it is the force or component of the force that the surface exert on an object incontact with it and which acts perpendicular to the surface
Sihle
what is physics?
Petrus Reply
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Anna Reply
how to calculate coefficient of static friction
Lisa Reply
how to calculate static friction
Lisa
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Tumelo
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Mogano
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Monambi
a structure of a thermocouple used to measure inner temperature
Anna Reply
a fixed gas of a mass is held at standard pressure temperature of 15 degrees Celsius .Calculate the temperature of the gas in Celsius if the pressure is changed to 2×10 to the power 4
Amahle Reply
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Raymond Reply
what is acceleration
Syamthanda Reply
a rate of change in velocity of an object whith respect to time
Khuthadzo
how can we find the moment of torque of a circular object
Kidist
Acceleration is a rate of change in velocity.
Justice
t =r×f
Khuthadzo
how to calculate tension by substitution
Precious Reply
hi
Shongi
hi
Leago
use fnet method. how many obects are being calculated ?
Khuthadzo
khuthadzo hii
Hulisani
how to calculate acceleration and tension force
Lungile Reply
you use Fnet equals ma , newtoms second law formula
Masego
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Mulaudzi Reply
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Mulaudzi
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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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