Monday, 22 September 2014

STARS

       

                             

STARS
                                                                                                                                                                                                                                                                                              When you look at the night sky you can see many stars.if you are out in the country or camping in the mountains or the desert away from the city lights,you may see thousands of them.you may even be able to see part of the milky Way.In a town or city,you can’t see nearly as many stars because the city lights create a glow in the sky masking many of them.
              There are several different kinds of stars in the sku.some are very big.a couple of stars have been found that are 100-200 times larger than the sun. sun very old stars are smaller than the earth.scientists study stars and place them in groups based on how they are alike and how they are different.                                                                        
DIFFERENT TYPES OF STARS
NO – 1  RED DWARF STARS    
      

A red dwarf is a small and relatively cool star on the mainsequence, either late K or M spectral type. Red dwarfs range in mass from a low of 0.075solar masses (the upper limit for a brown dwarf) to about 50% of the Sun and have a surface temperature of less than 4,000k.
Red dwarfs are by far the most common type of star in the Milky way galaxy, at least in the neighborhood of the Sun, but due to their low luminosity, individual red dwarfs cannot easily be observed. From Earth, not one is visible to the naked eye.[1] proxima centauri, the nearest star to the Sun, is a red dwarf (Type M5, apparent magnitude 11.05), as are twenty of the next thirty nearest. According to some estimates, red dwarfs make up three-quarters of the stars in our galaxy.
Stellar models indicate that red dwarfs with less than 35% of the Sun’s mass are fully convective. Hence the helium produced bythermo nuclear fusion of hydrogen is constantly remixed throughout the star, avoiding a buildup at the core. Red dwarfs therefore develop very slowly, having a constant luminocity and spectral type for, in theory, some trillions of years, until their fuel is depleted. Because of the comparatively short age of the universe, no red dwarfs of advanced evolutionary stages exist.

NO – 2  YELLOW DWARF
Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. 
NO – 3 BLUE GIANT
A blue giant is a huge, very hot, blue star. It is a post-main sequence star that burns helium. 
NO - 4 WHITE DWARF
A white dwarf is a small, very dense, hot star that is made mostly of carbon. These faint stars are what remains after a red loses its outer layers. Their nuclear cores are depleted. They are about the size of the Earth (but tremendously heavier)! They will eventually lose their heat and become a cold, dark black dwarf. Our sun will someday turn into a white dwarf and then a black dwarf. The companion of Sirius is a white dwarf.  
NO – 5 BROWN DWARF
A brown dwarf is a "star" whose mass is too small to have nuclear fusion occur at its core (the temperature and pressure at its core are insufficient for fusion). A brown dwarf is not very luminous. It is usually regarded as having a mass between 1028 kg and 84 x 1028.   
                                                                                         

A star is a massive luminous sphere of plasma held together by its own gravity. The nearest star to earth is the Sun, which is the source of most of the planet's energy. Some other stars are visible from Earth during the night, appearing as a multitude of fixed luminous points due to their immense distance. Historically, the most prominent stars were grouped into constallations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations

PPT ABOUT WAVE MOTION

PPT ABOUT LESSON TEMPLATE

Top 6 scientists

THE 6 GREAT SCIENTISTS OF THE WORLD

SCIENTISTS have enormous contribution in the advancement of human civilization. Throughout the history of the world, manyscientists have dedicated their lives for research and innovation. Some of them even faced a lot of torture for their theories but they continued their mission and thus we are now in a modern world. I have made a list of 6 great scientists in the history. Well, naturally, I had to leave out a lot of great figures. However, I feel that my list represents some of the greatest scientists ever.
NO -1
ARISTOTILE….


 ARISTOTILE is the Great philosopher who had a vast knowledge in different disciplines. Studying different subject he contributed a lot in each of those subjects. He contributed in physics, poetry, zoology, logic, rhetoric, politics, government, ethics, and biology. This laurel Greek philosopher was born in Stagira in 384 BC. His father Nicomachus was a physician to the king Amyntas III of Macedon’s court and it is believed that their ancestors also held this position. Earlier in his life he was taught by his father at home and the medical knowledge he got from his father led him to investigate natural phenomenon later on. At the age of 18 he admitted in to the young Greek aristocracy run by Plato, another Great Greek philosopher, and Aristotle became the most favorite student of Plato.
As a scientist Aristotle made a good contribution which was very influential for the development of the science over the year. Mainly he spent most of his life researching the natural science and he did the researches without making reference to theMathematics which was later proven as the weakness of his research by the scientists. His natural science oriented research includes botany, zoology, physics, astronomy, chemistry, and meteorology, geometry and many more. He was also the teacher of the Great warrior Alexander the Great. This great philosopher died n 322 BC.
NO -2
Sir ISAAC NEWTON…..
                                             

                                          
 NEWTON was also a man of versatile quality. He was physicist, mathematician, astronomer, alchemist, and natural philosopher in a row. His contribution in the development of science is a special one. He I best known for his explanation of Universal Gravitation and three laws of motion, and he was able to prove that the reason of both the motion of objects on Earth and of celestial bodies are controlled by the same Neutral laws. These findings could make a revolutionary change in the development of science. In mechanical science his great contribution was in optics. He could make a reflecting telescope. He also made some research on light and stars. His research on General binomial Theorem helped to be introduced today’s Calculus.
Newton was born to a farmer family but before three months of his birth his father died and then he was brought up to his maternal grandmother as her mother remarried. Newton could show his talent from his early life in The King’s School in Grantham and later he joined to the Cambridge University where he took his higher degrees.
NO -3
GALILIO GALILEI….
                                        
                                        
GALILIO is considered as one of the greatest contributor to thedevelopment of Science. It is undoubtedly true that Galileo could first helped science to come out of the trend of Aristotle. He wasphysicist, astronomer, and philosopher and his best known contributions lie in the development of Telescope, first two laws of motion and also in Astronomy. He is also considered as the father of astronomy, father of physics and father of science.
He was born to a mathematician and musician father Vincenzo Galilei and his mother was Giulia Ammannati in Italy. He was taught form his very early life. He was the first scientist who followed the way of quantitative experiments in his research where the result was based on mathematics. He had to suffer a lot from the church for his theories.
NO -4
CHARELES ROBERT DARWIN….
                                                  

    There can be debate about whether CHARELES DARWIN (12 February 1809  19 April 1882) is the greatest scientist of all time but there is no doubt that he is the most controversial scientist of all time. On the Origin of Species by Means of Natural Selection (1859)- this is the book that has made Darwin immortal in the world history. This book has changed the course of science radically. It is perhaps an irony that Darwin studied theology and instead of becoming a clergy, he became naturalist.
Darwin went to different parts of the world and carried out extensive research. His theory about origin of human beings caused widespread controversy. Darwin stated that human beings have evolved through many changes and survival of the fittest was in important factor in the development of animal world.Darwin’s theory still causes passionate debate among his supporters and opponents.
NO -5
ALBERT EINSTEIN….
                                            

EINSTEIN is the great scientist of the twentieth century and notable physicist of all time. It is told that he had Learning disability in his childhood. He could not talk till he was three and could not read till he was eight. Despite such problems he later became the noble prize winner for his contribution to the Physics. His theory of relativity is considered as a revolutionarydevelopment of Physics. He got Noble Prize in Physics in 1921 for his explanation of the Photoelectric Effect and for his research in Theoretical physics.
NO -6
THOMAS EDISON….
                                         

Edison is the great inventor who has over 1000 patents and his inventions are in various fields used in our daily life. In his early life he was thought to have a learning disability and he could not read till he was twelve and later he himself admitted that he became deaf after pulling up to a train car by his ears. He first could able to turn the attention of the world after inventing Phonograph. His one of the most popular invention is the Electric Bulb. He also developed the telegraph system. His invention of carbon telephone transmitter developed the carbon microphone which was used in the telephoned till 1980. He also became a prominent businessman and his business institution produced his inventions and marketed the products to the general people.



Sunday, 21 September 2014

Approaches to curriculum organisation







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The Concept of curriculum

The term curriculum is derived from the Latin word currere which mean path.  In this sense curriculum is the path through which the student has to go forward in order to reach the goal envisaged by education usually the term curriculum is understood as a group of subjects prescribed for study in a particular course.  But curriculum is not confined to this narrow concept.  Curriculum should in no way to considered as synonymous with courses of study.  The course course of study does list much of the content to be learnt and indicate some of the major activities but these form only part of the curriculum.  Curriculum should be considered as a broad-based term encompassing every aspect concerning a course of study.  Curriculum for a course of study may be conceived us the totality of experiences a pupil is exposed to within the boundaries of the school and outside while undergoing that course, with a view to achieve the anticipated educational goals.
Definition of curriculum
Curriculum has been defined by different persons in different ways:
·         Curriculum is a tool in the hands of an artists (teacher) to mould his material (pupils) according to his ideals (objectives) in his studio (school) – Arthur Cunningham
·         Curriculum is that which the pupil is taught.  It involves more than the act of learning and quiet study.  It involves occupations, productions, achievement, exercise and activity
     H.H. Horne.




CURRICULUM DEVELOPMENT
Curriculum approaches
            Curriculum practitioners and implementers may use one or more approaches in planning, implementing and evaluating the curriculum.  Even the text book writers or instructional material producers have different curriculum approaches.
The following are the four curriculum approaches.
Approaches to curriculum organizations
There are several approaches to curriculum organization. the major approaches are:
1.      Integrated approach
2.      Disciplinary approach
3.      Pupil centered approach
4.      Teacher centered approach
5.      Process approach
6.      Content for subject centered approach
7.      Factual approach
8.      Conceptual approach
9.      Flexible approach
10.  Structured approach
11.  Concentric and spiral approaches
12.  Psychological and logical approaches
13.  Topical and unit approaches

a) Concentric and spiral approaches
The whole curriculum is spread over a number of years.  a general treatment of almost all the topics are attempted at the beginning and it is developed in successive years according to the mental development of the pupils.  In the beginning of the course, the whole aspect is given to pupils in a simplified way.  In the next year more and more details of its parts are added.  It follows the maximum of teaching, such as from whole to part, simple to complex, easy to difficult etc. Among educationist of modern times, Burner is the main exponent of the approach is maintained.  Sometimes this approach is referred to as concentric approach.  But the term “spiral approach” is preferred to the other.  The term spiral gives the additional implication that while attempting gradation the linkage too is taken care of and the continuing of the topic concerned is never broken.  While conceiving it as concentric only the widening of the scope is indicated but the linkage is not taken care of.


                                                                 
b) Psychological and logical approaches
The arrangement of subject matter based on the principles of psychology is known as psychological approach.  In this approach, the criterion for inclusion of an item in the curriculum will be the psychological needs, requirements, potentials, capacities, etc.  Appropriate for the developmental level of the stage for which the curriculum is being designed.  In other words this approach is in tune with the principle of child-centeredness.  In the logical approach stress is given to the logical sequence.  It is often criticized that by splitting topics to suit the developmental status of the learner, this logical developments broken. Logical approach demands maintaining the logical sequence while developing a curriculum.  At the same time, a good curriculum if carefully developed can maintain the psychological approach without sacrificing the logical sequence of the subject.
c)Topical and unit approaches
Every subject of study involves number of topics.  a topic is a comprehensive collection of elated learning materials pertaining to specific are of the subject, systematically and sequently arranged so as to get a holistic picture of those aspects.  There are a large number of concepts,  principles, processes and skills associated with this area.  Which act as related part of a “whole”. Since these aspects are inter-related and maintain certain logical sequences and co-relations, it is often advised that the topic should be thoroughly dealt with and mastered before passing in to another topic.  This is known as the topic approach in curriculum.



d) Behavioral approaches
This is based on a blueprint, where goals and objectives are specified, contents and activities are also arranged to match with the learning objectives.  The learning outcomes are evaluated in terms of goals and objectives set at the beginning.  This approach started with the idea of Frederick Taylor which is aimed to achieve efficiency.  In education, behavioral approach begins with education plans that start with the setting of goals of objectives.  These are the important ingredients in curriculum implementation as evaluation the learning out comes as a change of behaviour. The change of behaviour indicates the measures of the accomplishment.


e) Managerial Approach
In this approach, the principal is the curriculum leads and at the same time constructional leader who is supposed to be the general manager.  The general manager sets the policies and priorities, establishes the direction of change and innovation, and planning and organizing curriculum and instruction school administrations are less concerned about the content than about organization and implementation.
f) System approach
This was influenced by systems theory, where the parts of the total school district of school are examined in terms of how they relate to each other. The organizational chart of the school represents a systems approach it shows the line –staff prelateship of personal and how decisions are made. The following are of equal importance:
a)      Administration
b)      Counseling
c)      Curriculum
d)     Instruction
e)      Evaluation
g) Humanistic Approach
            This approach is rooted in the progressive philosophy and child-centered movement.  It considerate the formal or planned curriculum and the informal or hidden curriculum. It considers the whole child and believes that in curriculum the total development of the individual is the prime consideration.  The learners at the center of the curriculum.
CONCLUSION
Curriculum is the plan for bringing desirable changes in student behavior.  There are many approaches in curriculum organization.

Dehignmg  of curriculum is associated with social, emotional and psychological factors of a child, which aims the total development of a child in their life.

Reference

·         www.psychologistworld.com
·         www.esl.eur.nl/home/..
·         www.ncsall.net › ...
·       www.unom.ac.in/..