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Natuurwetenskappe

Energie-oordrag en kragte

Opvoeders afdeling

Memorandum

(a) Vliegtuigloodse/op skepe.

(b) Vergemaklik die taak om skroewe vas of los te draai, aangesien die skroewe deur die gemagnetiseerde skroewedraaier aangetrek word.

(c) Min krag word benodig om die deur toe te maak, aangesien dit deur magnetisme aangetrek word; dit is belangrik dat ‘n yskas dig seël.

(d) Om fyn stukkies staal uit ‘n pasiënt se oog te verwyder.

(e) Klankgolwe word aangetrek.

(f) Afstandbeheerde speelgoed.

Kom ons toets ons kennis

(a) Afstoot; aantrek.

(b) Die wat deur ‘n magneet aangetrek word, is magneties en die wat nie deur ‘n magneet aangetrek word nie, is nie-magneties.

(c) Albei pole is ewe sterk.

(d) Noordpool na die suidpool.

(e) Uitsit.

(f) Koper.

(g) Onwaar.

(h) Suidpool.

(i) Noordpool.

(j) Toets of dit magnetiese stowwe kan aantrek.

Leerder afdeling

Inhoud

Aktiwiteit: groepwerk: om die nuttige aanwending van magnete in die alledaagse lewe te beskryf [lu 2.4]

(a) ‘n Magneet wat vry draai, word ‘n kompas genoem. ‘n Kompas dui vir ons rigting aan.

Die naald kom altyd tot rus met een pool wat noord wys – noordsoekende pool of noordpool van die magneet. Die ander pool van die naald is die suidsoekende pool of suidpool van die magneet.

Noem twee gevalle waar die gebruik van kompasse noodsaaklik is:

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(b) Sommige skroewedraaiers is gemagnetiseer.

Van watter nut is dit vir die gebruiker?

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(c) Yskaste, asook sommige kaste, het magnete in hul deure.

Waarom word magnete in deure gebruik?

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(d) Dokters gebruik ook sterk magnete.

Kan jy dink waarvoor?

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(e) Telefone en luidsprekers bevat magnete.

Wat is die funksie van die magnete in hierdie instrumente / toerusting?

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(f) Sommige speelgoed het magnete.

Van watter speelgoed weet jy wat magnete het en waarom het dit magnete?

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Questions & Answers

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the study of living organisms and their interactions with one another and their environments
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HOW CAN MAN ORGAN FUNCTION
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They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
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Genetics is the study of heredity
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the study of living organisms and their interactions with one another and their environment.
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Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
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advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
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cells is the basic structure and functions of all living things
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is organisms that are similar into groups called tara
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A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
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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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