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Natural sciences

The earth and beyond

The stars

Educator section

Memorandum

1. Star: Heavenly body that emits light. Consists mainly of burning helium and hydrogen.

Planet: Lifeless heavenly body that gets light from the sun.

2. Look at page 2 in the module.

Leaner section

Content

EARLY MAN TRIED TO EXPLAIN THE MOVEMENT OF THE STARS AND PLANETS BY MEANS OF MYTHS AND LEGENDS. THE ANCIENT GREEKS TOOK A MORE SCIENTIFIC VIEW, BUT EVEN THEY BELIEVED MISTAKENLY THAT THE EARTH WAS AT THE CENTRE OF THE UNIVERSE.

FOR A FEW HUNDRED YEARS ONLY HAVE WE KNOWN THAT THE EARTH IS A VERY SMALL AND INSIGNIFICANT DOT? OUR SMALL PLANET ORBITS THE SUN, WHICH IN TURN IS MERELY ONE OF APPROXIMATELY 100 000 MILLION STARS IN OUR GALAXY AND WE NOW KNOW THAT THERE ARE AT LEAST 1 000 MILLION OTHER GALAXIES AS WELL.

Activity: to discuss the use of stars and planets with regard to the development of calendars [lo 2.1]

THE CHRISTIAN CALENDAR

  • This calendar uses the sun as the main means of keeping time. One year therefore measures 365¼ days - the exact duration of one of the earth's orbits of the sun. The beginning of the Christian calendar is the birth of Jesus Christ. The years preceding this event are referred to as before Christ or BC, and the years following it are spoken of as anno Domini (the year of the Lord) or AD.
  • This calendar is the most commonly used calendar throughout the world (also by non-Christians).

THE MUSLIM CALENDAR

  • People in the Muslim community use the moon to keep time. (The moon, being still and lifeless, has no light of its own but merely reflects the light of the sun. The moon therefore is not a star.)

THE JEWISH CALENDAR

  • Jews use a calendar that refers to the moon for counting the months and the sun for determining the length of the years. This calendar is dated from the time of the Biblical creation of the world.
  • Although the Jewish and Christian calendars use the sun to determine the length of a year, the dates of the Christian and Jewish New Year do not coincide.

THE CHINESE CALENDAR

  • The sun and the planet Jupiter are used by the Chinese to calculate time. Jupiter takes about 12 years to complete an orbit of the sun. The Chinese calendar is therefore based on a cycle of twelve years. Each year is named after an animal.
  • Each of the animals have particular characteristics, which, according to Chinese belief, are transferred to the people who are born in the particular year.

FIND OUT

1. Consult a dictionary or any other dependable source to find out what the difference between a planet and a star is.

Star: _________________________________________________
_________________________________________________
_________________________________________________
Planet: _________________________________________________
_________________________________________________
_________________________________________________

2. Explain how the calendars of Christian, Jewish, Muslim and Chinese people differ.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information.

Questions & Answers

how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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