<< Chapter < Page Chapter >> Page >

Natuurwetenskappe

Planeet aarde en die heelal

Ons sonnestelsel

Opvoeder afdeling

Memorandum

Opdrag 1:

Asteroïdes: Dit is stukke rots wat in die sonnestelsel in ‘n wentelbaan om die son aangetref word in ‘n small strook tussen die planete Mars en Jupiter.

Komete: Komete is reusagtige, vuil sneeuballe met ‘n deursnee van 1 km tot ongeveer 50 km. Indien hulle naby die son kom, verander die komeet se ys in gas as gevolg van die hitte van die son.

Meteore: Dit is klein stukkies rots wat in die ruimte rondbeweeg en uitbrand. Hulle word sigbaar wanneer hulle die aarde se atmosfeer binnedring. Hulle word soms verskietende sterre genoem en lyk soos vuurballe. Soms brand groter meteore nie heeltemal uit nie en wanneer hulle die aarde se oppervlak tref, vorm hulle kraters. Wanneer ‘n meteoor op die aarde val, word dit ‘n meteoriet genoem.

Opdrag 2:

  • Die Griekse word, “cometes” beteken “harige ster”. Wanneer komete naby die son kom, verander die ys in gas. Stof word ook uit die ys vrygestel, en van die aarde af kan hierdie stof gesien word as ‘n lang stert wat weg van die son draai. Dit vertoon dan amper soos “hare” en vandaar die benaming “harige ster”.
  • Die komeet verskyn elke 76 jaar. Dit is wanneer die komeet verby die aarde beweeg in sy wentelbaan om die son.
  • Die komeet het twee keer verskyn, nl. 1910 en 1986.
  • Ja, indien ‘n mens gebore word naby die komeet se verskyning, is dit moontlik om dit ‘n tweede keer te aanskou.
  1. Eie navorsing.

Leerder afdeling

Inhoud

Aktiwiteit: om ‘n oorsig van ons sonnestelsel te gee [lu 1.1]

Lees die onderstaande gedeelte aandagtig deur en beantwoord dan die daaropvolgende vrae:

Sonnestelsel

Die aarde is deel van ‘n groep planete en liggame wat die sonnestelsel genoem word. Die son is die middelpunt van die sonnestelsel en die ander liggame wentel daaromheen. Die son is eintlik ‘n ster en is baie groter as die ander lede van die sonnestelsel. Dit is die bron van feitlik al die lig en hitte in die sonnestelsel. Die planete skyn deur sonlig te weerkaats.

Daar is nege planete: Mercurius, Venus, Aarde, Mars, Jupiter, Saturnus, Uranus, Neptunus en Pluto. Alle planete het mane, behalwe Mercurius en Venus. Party planete het net een maan, soos die aarde, maar ander het meer. Saturnus het sewentien.

  • Die son het ook kleiner familielede, byvoorbeeld meteore, asteroïdes en komete. Die meeste asteroïdes wentel om die son in kleiner bane.

OPDRAG 1

Gebruik ‘n woordeboek en definieer die volgende:

1. Asteroïdes:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

2. Komete:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

3. Meteore:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

OPDRAG 2

Die sterrekundige, Edmund Halley, het in 1705 voorspel dat ‘n komeet in 1758 sou verskyn. Hy was korrek. Hy het uitgewerk in watter jaartalle dieselfde komeet weer sou verskyn. Met die herverskyning van die komeet was hy reeds oorlede, maar ter ere van sy prestasie het die mense die komeet na hom vernoem.

Doen ‘n kort navorsing (2-3 folio’s) oor Halley se komeet waarin jy die volgende aspekte aanspreek:

  • Waarom is die woord “komeet” van die Griekse woord, “mimetes” (harige ster) afgelei?
  • Hoe gereeld verskyn die komeet? Hoekom juis dan?
  • Hoeveel keer het dit gedurende die twintigste eeu verskyn? (1901 tot 2000).
  • Is dit menslik moontlik om die komeet twee keer te aanskou?
  • Kort aantekeninge oor die lewe van Edmund Halley.

Navorsingsopdrag: Edmund Halley Leerkragassessering

KRITERIA 1 2 3 4
TEGNIESE VERSORGING:
  • Voorblad: Onderwerp aangedui; Naam
  • Netjies versorg
  • Betyds ingehandig
  • Voorgeskrewe lengte
INHOUD:
  • Onderafdelings aangedui
  • Inligting logies weergegee
  • Interessante feite bygevoeg
  • Slotparagraaf?
  • Illustrasies of prente?
TAALGEBRUIK
  • Is paragrawe gebruik?
  • Korrekte taalgebruik?
  • Lees- of skryftekens gebruik
BEWYSE VAN NAVORSING
  • Bronnelys aangedui
  • Bronnelys korrek aangedui
  • Alle vrae is beantwoord
OORHEERSENDE KODE
VERWERK NA PUNT:0% - 34%: 135% - 39%: 240% - 69% 370% - 100% 4 Persentasie toegeken: %

Kommentaar: ________________________________________________

___________________________________________________________

___________________________________________________________

Leerkrag:___________________________________________________

Assessering

Leeruitkomste 1: 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.

Assesseringstandaard 1.1: Dit is duidelik wanneer ondersoek beplan: beplan eenvoudige toetse en dink na oor hoe om dit billik te maak.

Questions & Answers

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
what is anaemia
Diya Reply
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
Diya Reply
how does Lysin attack pathogens
Diya
acid
Mary
I information on anatomy position and digestive system and there enzyme
Elisha Reply
anatomy of the female external genitalia
Muhammad Reply
Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
Theophilus Reply
what's lochia albra
Kizito
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 7' conversation and receive update notifications?

Ask