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Natuurwetenskappe

Planeet aarde en die heelal

Die binneplanete

Opvoeder afdeling

Memorandum

Opdrag 4:

  • Mercurius; Venus; Aarde; Mars; Jupiter; Satarnus; Uranus; Neptunus; Pluto

Opdrag 5:

1. Mercurius

2. Daar is geen suurstof, asook geen water, op Mars nie. Die atmosfeer is ook nie dig genoeg om die skadelike UV-strale uit te hou nie.

3. Venus het amper dieselfde massa en grootte as die aarde.

4. Venus (swawelsuur)

5. Mars se wentelbaan is baie nader aan die son as Neptunus s’n.

6. Die maan.

7. Daar is yster in die grond wat die grond ‘n rooi kleur gee.

8. Genoeg suurstof en water; klimaat geskik vir plantegroei; atmosfeer regte dikte en digtheid. (2)

9. Indien noodseine of bevele gestuur word, bereik dit eers die aarde twee uur later. Die ontvangs is ook soms baie swak.

Totaal: 10

Opdrag 6:

  • Gebruik assesseringsmatriks.

Opdrag 7:

1. Venus en aarde.

2. 150 miljoen km; Dit is die afstand wat die aarde van die son af is en waar ons tans oorleef.

3. Mercurius

4. Venus en Mars; lê weerskante van die aarde; nie te ver of te naby die son nie.

5. Ja. Hoe nader die planete aan die son lê, hoe hoër is die gemiddelde spoed.

6. Moontlik as gevolg van die aantrekkingskrag en energie van die son.

7. 4 minute

24 x 60 minute = 1440 minute (dit neem die aarde 24 uur om sy eie as te roteer)

1 440 minute gedeel deur 360 grade = 4 minute

Opdrag 8.1:

Vrae:

1. Foto’s toon dat daar droë rivierbeddings op Mars is. Al die water het verys en by die pole versamel. Hulle vermoed dat daar groot seë en riviere was. Hierdie water is nou ondergronds.

2. Die gemiddelde temperature was heel moontlik hoër.

3. Mars is verder as die aarde van die son en ontvang dus minder energie van die son. Alhoewel die son ‘n ontsaglike groot bron van energie is, gaan dit ook mettertyd krimp en verswak.

4. ‘n Mens sal baie moeilik en vlak asemhaal en gou sterf, aangesien daar te veel koolstofdioksied in die lug is.

Opdrag 8.2:

Vrae:

1. -60 grade

2. Dag 1: 18:20

Dag 2: 10:45

3. Dag 1: 14:30

-15 grade

4. vanaf 06:00

5. Wanneer daar ‘n stofstorm kom, absorbeer dit die hitte van die son en dit laat temperature styg. Daar is ook baie koolstofdioksied in Mars se atmosfeer en dit kan ook die temperatuur verhoog.

  • Oop antwoorde; enige realistiese verduideliking.

Leerder afdeling

Inhoud

Aktiwiteit: om die planete van ons sonnestelsel te bespreek [lu 1.2, lu 1.3, lu 2.1, lu 2.2, lu 2.3]

  • Mercurius

Dit is die naaste planeet aan die Son. Mercurius het baie kraters op die oppervlak wat veroorsaak is deur asteroïdes wat met die planeet gebots het. Mercurius het nie ‘n atmosfeer of enige mane nie. Die temperatuur by die ewenaar is ongeveer 400 grade Celsius en by die pole is dit –150 grade Celsius.

  • Venus

Venus het wel ‘n atmosfeer van koolstofdioksied en dit is baie digter as dié van die aarde. Sy oppervlakte word verberg deur dik wolke swawelsuur. Temperature op die oppervlakke bereik ongeveer 480 grade Celsius. Venus is ongeveer dieselfde grootte as die aarde en het ook ongeveer dieselfde massa.

  • Aarde

Sover bekend, is die aarde die enigste plek in die Heelal waar daar lewe is. Temperature op die oppervlak wissel van 60 grade Celsius tot –90 grade Celsius. Ongeveer twee derdes van die oppervlak is met vloeibare water bedek.

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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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