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Natural sciences

The earth and beyond

The stars

Educator section

Memorandum

Assignment 1:

  • Follow the directions in the module and let each learner make a planisphere.
  • Instead of a paper clip, a thumb tick and Prestik can also be used.
  • Ensure that the hours are marked as follows on the upper disk of the planisphere.

How to make the planisphere “outside”.

  1. Hold the map to the light. It has to show downwards, so you can see the constellations.
  2. Find the place on the upper disk where "midnight" is indicated and ensure it points south. (Ensure that the eastern and western horizons are in the correct "places".)
  3. Turn the upper disk so that the precise hour lines up with the correct date on the lower disk.

4. The stars that are visible through the plastic should now also be visible in the sky above you.

Assignment 2:

This activity can be completed in class. To keep it simple, bear the following in mind:

  • 1) provide a date, e.g. 26 May;
  • 2) and a time, e.g. 21:00 or 22:00.
  • Keep the times full hours and not minutes before or after the hour.
  • It is important that the learners know that stars are ALWAYS in the heavens, even during the day. But we cannot see them then.

Decide in advance which date is to be given to the learners, so that enough constellations and bright stars will appear in the window of the planisphere.

Leaner section

Content

Activity: to identify constellations and stars with the help of a planisphere [lo 1.2]

  • As all stars are not visible throughout the year. A planisphere, a model for assisting a viewer in finding constellations in night sky and recognising individual stars is used.

ASSIGNMENT 1

MAKE YOUR OWN PLANISPHERE

1. Draw or make a photostat copy of the following form on stiff cardboard and mark off the 24 hours of the day along the outside edge.

2. Cut out the section that is indicated, using a sharp cutter. Cover the opening with stiff plastic as indicated in the sketch.

3. Photostat the following star chart of the constellations in the Southern Hemisphere: cut it out along the outer edge and glue it to the cardboard.

IMPORTANT TO KNOW:

The names of the brightest stars are shown in bold print.

4. Make a small hole in each of the circles and use a paper clip to keep them together securely on top of one another, as in the sketch.

NOW USE THE PLANISPHERE AS FOLLOWS:

Rotate the top disc to align the relevant time with the date of the relevant day on the bottom disc. The constellations that are visible through the plastic window will be those that appear in the night sky on the particular date.

ASSIGNMENT 2

  • Your educator will provide a date and a particular time. Consult your planisphere and copy down the names of all the constellations and bright stars that are visible at the particular time. Make a clear distinction between constellations and bright stars.

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Educator’s AssessmentCRITERIA 1. 2. 3. 4.
1. Constellations indicated correctly.
2. Bright stars indicated correctly.
3. Neatness

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
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Devang Reply
are you nano engineer ?
s.
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Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
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SUYASH Reply
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SUYASH
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s. Reply
of graphene you mean?
Ebrahim
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Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
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Cied
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abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
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Porter
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what is the function of carbon nanotubes?
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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
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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
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Prasenjit
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Damian
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Damian
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I'm interested in Nanotube
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this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
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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.
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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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