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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 11

Die nut van plante

Aktiwiteit:

Om oor die nut van plante te gesels, dit te ondersoek en te beskryf

[lo 1.1, 1.2, 1.3, 2.1]

Plante beteken baie meer vir die mens as net iets om te eet. Plante stel deur fotosintese die suurstof vry wat ons nodig het om in te asem. As plante doodgaan, vorm dit weer kompos wat die grond vrugbaar maak sodat nuwe plantjies kan groei. Diere lewe ook van plante. Sommige diere skuil onder plante, want dis ‘n woonplek vir voëls, reptiele en sommige soogdiere. Sonder plante sou ons ook nie vleis, melk en eiers hê nie, want die diere wat hierdie produkte lewer, lewe ook van plante.

Gebruik die volgende leidrade om uit te vind waarvan daar gepraat word:

LEIDRADE

  1. kom van gom (latex) wat van snye in die bas van rubberbome versamel word
  2. kom van die vesels in die blare van die sisalplant
  3. word in salwe gebruik en smaak baie sleg
  4. word gebruik vir medisyne, geurmiddels in kos, reukwater, skoonheidsmiddels, toiletbenodigdhede en insekteweerders.
  5. kom van die watte van die katoenplant.
  6. kom van die bas van eikebome om wynbottels te verseël
  7. hou verkoues weg en word in kos as geurmiddel gebruik
  8. Aspirien kom van die bas van die wilgerboom
  9. word van verskeie soorte bome verkry.
  10. kom van die kamilleplant om jou te help om te ontspan

Opdrag:

Maak ‘n collage uit ou tydskrifte om die nut van plante aan te dui.

LU 1

Assessering

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 duidelik wanneer die leerder:

1.1   ondersoek beplan;

1.2   ondersoek uitvoer en data versamel;

1.3       data evalueer en bevindings kommunikeer.

 

LU 2

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

 

Dit is duidelik wanneer die leerder:

2.1   betekenisvolle inligting onthou;

2.2       inligting kategoriseer.

 

Memorandum

Leidrade:

  1. rubber
  2. tou
  3. kasterolie
  4. kruie
  5. katoen
  6. kurk
  7. knoffel
  8. medisyne
  9. hout
  10. tee

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
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John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
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David Reply
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David
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emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
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Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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