10th standard March 2013 Annual exam Question Paper

Thursday, 28 March 2013

SSLC March 2013 Annual exam Question Paper Free Download

1. 10th Tamil First Paper March 2013        Download Here
2. 10th Tamil Second Paper March 2013    Download Here

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General essay - science - a boon

Saturday, 2 March 2013

1.     SCIENCE - A BOON

Introduction: Science is a great boon to mankind. The modern man cannot think of this world without the inventions of modern science. Science has touched every walk of life.

Use of Science: Science is useful to us in several ways. All the modern inventions chiefly depend on the firm foundation of science. On every field-architecture, communication net work, entertainment, medical technology and transport – science has its impact.

Agriculture: The primitive methods in agriculture have been gradually substituted by modern technology. The scientific methods help us to increase production and minimize wastage. Even illiterate farmers make use of tractors to till their land and chemical fertilizers to improve production.

Healthy Life: Nowadays hospitals make use of sophisticated equipment to  give treatment to patients. Advancement in medical science is a great  blessing to us. As a result, people enjoy a healthy life, live longer and suffer less pains. Complicated  surgery can be easily performed at present making use of Scanning, X-rays etc.

Transport: In the field of transportation, rapid changes have taken place. We travel faster. Jet planes and other electronic devices have narrowed down the distance and thereby the world has shrunk. We enjoy greater comfort and save a lot of our precious time.

Entertainment:The Radio, the television, the cassette player, the video games etc. have become part of our everyday life. The tedium of the housewife is lessened to a larger extent by means of the grinder, the refigirator, the gas stove etc.

Conclusion: In fine, no one can deny the advantages of modernscience. Every invention is the brain-child of man. Man should not become a slave to machines. He must control themand continue to enjoy the comforts of science. 

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General essays - The Role Of Computers

1.     THE ROLE OF COMPUTERS

Introduction: Computer is capable of solving problems by processing information. It can perform mathematical calculations. It organizes and analyzes data. It also can predict weather patterns.

Characteristics of computer: Computer is known for its speed and storage. Its accuracy,  

Main components: The main components of a computer are the monitor or screen, the CPU (Central Processing Unit) and the key board. Programming is the name given to the art of writing a programme in a special language, such as Visual BASIC, Java, C++ etc.

Widely used: Computers are widely used in educational institutions, research institutions, offices, industries, and medical departments. Defence, stock & share market, transport, designing, system analysis, architecture, and online ticketing also make use of computers.

Networking: The Internet is an amazing tool. It allows one to get in touch with people all over the world. It offers a wealth of opportunities to businessmen, students, advertisers etc using e-mail, e-commerce and e-governance.

Conclusion: Those who have little knowledge of computers would be branded as computer illiterates. But computer personnel have a bright future.

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samacheerkalvi sslc previous year questions free download

Thursday, 28 February 2013

Tamilnadu samacheer kalvi 10th standard  previous year questions free download

Sl.No	2012 June Questions	Month & Year	View Pdf	Download Pdf
01	Tamil First Paper	April 2012	View	Download pdf   Printable Format
02	Tamil Second paper	April 2012	View	Download Pdf
03	English First paper	April 2012	View	Download Pdf
04	English 2nd Paper	April 2012	View	Download Pdf
05	Maths	April 2012	View	Download Pdf
06	Science	April 2012	View	Download Pdf
07	Social Science	April 2012	View	Download Pdf
08	Tamil First Paper	July 2012	View	Download pdf
09	Tamil Second paper	July 2012	View	Download Pdf
10	English First paper	July 2012	View	Download Pdf
11	English 2nd Paper	July 2012	View	Download Pdf
12	Maths	July 2012	View	Download Pdf
13	Science	July 2012	View	Download Pdf
14	Social Science	July 2012	View	Download Pdf
15	Tamil First Paper	October 2012	View	Download Pdf
16	Tamil Second paper	October  2012	View	Download Pdf
17	English First paper	October  2012	View	Download Pdf
18	English 2nd Paper	October  2012	View	Download Pdf
19	Maths	October  2012	View	Download Pdf
20	Science	October  2012	View	Download Pdf
21	Social Science	October  2012	View	Download Pdf

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SSLC Science One marks English Medium 1. HEREDITY AND EVOLUTION

Wednesday, 27 February 2013

SSLC Science One marks English Medium 1. HEREDITY AND EVOLUTION

10th Science (samacheer kalvi ) One Mark

1. HEREDITY AND EVOLUTION

Fill  the Correct Answer

1.            The paternal and maternal genetic material which influence the trait is……………..
2.            The first ever scientific experimental study on heredity was worked out between the years…
3.            The first experiment of Mendel considering the inheritance of a single trait is called……
4.            The men like Hominids  who walked into Eastern Africa were measured to be…………
5.            The meat eaters who existed 1.5 million years ago were called………………..
6.            The term vaccine was coined by…………………
7.            Dolly was developed in the year…………………..
8.            The nucleus of udder cell which was used to develop Dolly was taken from…………………
9.            Vaccines are substance that confer immunity against………………
10.          Steroid drugs like prednisolone is produced from
11.          Antibiotics are chemical substances derived from microbes like…………………
12.          Bio-technologically synthesized vitamin B 12 is usesd to cure ………..
13.          Biological computers will be developed using
14.          Gene therapy is the means to treat or even cure genetic and acquired disease like
15.          In Germ line gene therapy, ……………………..
16.          Bio-Chips will be useful in …………………….
17.          …………………….are developed by employing techniques of bio-technology
18.          Insulin dependent diabetes  is caused by the degeneration of beta cells due to a ……………….
19.          Gene therapy is used to treat defects in…………………..
20.          The ………………..converts biological signal into electrial signal
21.          Bio-sensor is used in…………………….and ……………
22.          Bio sensor is a device consisting of immobilizes layer of biological material such as ………………
23.          Bio Chemically significant enzymes are derived from………………….
24.          Amylase is derived from………………of bacteria.
25.          The theory of Use and Disuse was proposed by…………………….
26.          Odour, freshness and taste of food can be measured by using………………
27.          Production of any toxin in the body due to infection  can be detected by……….
28.          ...…is so vast and has great scope for different fields like agriculture, medicine, food  industry .etc
29.          ...............are suspensions of killed or live germs which is employed to induce the production of
               antibodies and bring forth immunity.
30.          ..............are employed to kill the infectious germs and cure a disease.
31.          The somatic stem cells are derived from sources such as .....................
32.          ................vitamin is synthesized bio-technologically.
33.          ................cell culture is similar to that of embryonic stem culture  
34.          Fertilization made artificially in the laboratory is called...................
35.          The embryonic stem cells can be derived from.............which is developed by “in vitro fertilization”.
36.          .....................are the most un specialized mass of cells.
37.          The .............clones are developed by nuclear transfer into the host cell.
38.          The induced clones are developed by .................into the host cell.
39.          ...................clones include identical twins.
40.          The word .................refers only to living species.
41.          Monoclonal anti-bodies are the anti-bodies produced by ..............cells.
42.          ...............anti-bodies are now used for treatment of cancer.
43.          ..................are a type of derived lips.
44.          The term vaccine was coined in the year…………
45.          The first vaccine produced by bio-technology was used against ……………………virus
46.          Genetic  engineering has developed after the discovery of two …………………..
47.          ……………are the past enzymes which helps to join the broken DNA fragments.
48.          ……………………are the molecular scissors which cut DNA at specific site.
49.          Nitrogen fixation (NF-genes)  will help the cultivator to
50.          Which gene is used in nitrogen fixation?
51.          Anti viral protein produced by virus infected cells are called……………
52.          Archaic Homo sapiens arose in ……………………
53.          Archaic Homo sapiens developed  into distinct races during the ice age between years …………
54.          Pre-historic caves were developed about……………………years ago.
55.          The…………….man who lived in East and Central Asia 1 million years ago.
56.          …………………….explained the development of long neck of Giraffe.
57.          We often associate Darwin solely with theory of ……………….
58.          Charles Darwin conducted his studies on…………………….
59.          Variation may be defined as the difference in the ……………….
60.          Diffference in the characteristics among the individual of the same species are called…………..
61.          Diffference in the characteristics among the individual of the different genera  are called……..
62.          Evolution tree is used to show the inferred evolution, relations among various species based
               on……………. and…………..character.
63.          Minor variation in offspring is seen in…………..
64.          Offspring of asexual reproduction shows………………..
65.          ……………………are the factors which form the physical basis for inheritance of characters.
66.          Alternate expression of same gene are called…………..
67.          The contrasting pairs of alleles make up an…………………
68.          Tall and Dwarf plants are example for……………………..
69.          Phenotype ratio of mono hybrid cross is …………………..
70.          Genotype ratio of mono hybrid cross is……………..
71.          The expression of gene of an individual for a particular trait is called…………….



Answers
1.            DNA
2.            1822-1884
3.            Mono hybrid cross
4.            Not taller than four feet.
5.            Homo erectus
6.            Edwaed jenner
7.            July  1996
8.            Six Year old Finn Dorest white sheep.
9.            Specific  diseases
10.          Rhizopus
11.          fungi, Bacteria
12.          Pernicious anemia
13.          Bio-Chips
14.          Cancer
15.          egg and sperm of the parents are changed
16.          Defense, Medicine
17.          Micro Chips.
18.          defective gene
19.          Somatic cell
20.          bio sensor
21.          medicines and industry.
22.          enzyme, antibody, hormone, nuclei acids.
23.          microbes
24.          amylo proteins.
25.          Lamarck
26.          Bio-sensor
27.          Bio-sensor
28.          Bio-Technology
29.          Vaccines
30.          Antibiotics
31.          bone marrow, embryos, amniotic fluid and umbilical cord
32.          B12
33.          Somatic stem
34.          invitro fertilization
35.          early embryo
36.          stem cells
37.          artificial
38.          nuclear transfer.
39.          Natural
40.          clone
41.          cloned
42.          Monoclonal.
43.          Steroid.
44.          1791
45.          Hepatitis B
46.          enzymes.
47.          lygase
48.          Endo nuclease (OR) Restriction Endo nuclease
49.          increase productivity
50.          NF  gene
51.          inter ferons
52.          South Africa
53.          75,000 – 10,000
54.          18,000
55.          Neanderthal
56.              Jean Baptise Lamarck
57.              evolution
58.          the role of earth worms in soil fertility
59.          genes
60.          intra specific variation
61.          inter generic variation
62.          Physical , Genitic
63.          amoeba
64.          minor variations
65.          genes
66.          alleles
67.          allelo morph
68.          allelo morph
69.          3:1
70.          1:2:1
71.          genotype

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SSLC Science One marks English Medium - 13. Carbon And Its Compounds

Tuesday, 26 February 2013

SSLC Science One marks English Medium - 13. Carbon And Its  Compounds

1. Valency of carbon is ............... (Ans: 4 )
2. Atomic number of carbon is .............. (Ans: 6 )
3. Mass number of carbon is ........................ ( Ans: 12 )
4. The electronic configuration of carbon is ..................... (Ans: 1S2 2S2  2P2 )
5. Which is hold the key to planet and animal life on earth.................. (Ans: Carbon )
6. Which is the building blocks for living organisms......................... (Ans: Carbon )
7. Father of organic chemistry..................   ( Ans: Brezelius. )
8. The first organic compound created in lab................ ( Ans: Urea)
9. Urea is discovered by .......................... (Ans: friedrich wohler )
10. The vital force theory is given by .................... (Ans: Brezelices )
11. The compound urea is prepared from .............. ( Ans: ammonium cydanate. )
12. The allotropy of carbon are .......................... ( Ans: Diamond )
13. The value of kohinoor diamond is .............  ( Ans: 105 carat)
14. The three allotropy of carbon are ..................... ( Ans: Diamond , Graphite & Fullerene )
15. Organic chemistry is ................................. ( Ans: hydrocarbons its derivatives. )
16. An allotrophy of carbon has three dimensional structure and hardness is ................ (Ans: Diamond)
17. An allotrophy of carbon has hexagonal structure and softness is ......................... ( Ans: Graphite )
18. An allotrophy of carbon has foot ball shape is ............................. ( Ans: Fullerene.)
19. The elements has the property of self linking and other atom is .............................( Ans: carbon )
20. The element can exist in more than one form that are physically different but chemically similar called as............. ( Ans: Allotropy )
21. The number of carbon atoms in fullerenes ..................... ( Ans: 60 )

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SSLC Science One marks English Medium - 12. Periodic classification of Elements

Tamilnadu State Board SSLC Science One marks English Medium - (12. Periodic classification of Elements)

12. Periodic classification of Elements

01. The rocky impurity associated with the ore is called........................ ( Ans: gangue )

02. The impurity with ore is .............................. ( Ans: Gangue )
03. The metals which are found is state are........................( Ans: Au, Ag, Pt )
04. The important ore of Aluminium is .........................( Ans: Bauxite , Al₂O₃ .2H₂O )
05. The oxide ore of copper is .......................... ( Ans: Cuprite (Cu₂O )
06. The important ore of Iron is .......................... (Ans: Haematite Fe₂O₃  )
07. The oxide ore of zinc is ..............................( Ans: Zingyte (ZnO) )
08. The Carbonate ore of zinc is .........................( Ans: Celamine  ZnO₃ )
09. The Carbonate ore of calcium is ........................( Ans: marble   CaCO₃   )
10. The Carbonate ore of magnesium is ................ (Ans: Magnesite MgCO₃  )
11. The Carbonate ore of Iron is .........................( Ans: Siderite  FeO₃     )
12. The formula of cryolite is ................................ ( Ans:   Aa₃ Al F₃   )
13. The Ore of calcium fluroide is ............................( Ans: Fluarsar  CaF₂  )
14. The ore of silver chloride is ......................... (Ans: Horn Silver  AgCl )
15. The rock salt is .....................     ( Ans: NaCl )
16. The important ore of mercury is .......................... (Ans: Cinna bar (HgS) )
17. The important ore of lead is ......................... ( Ans: Galena (PbS) )
18. The important ore of Zinc is ........................ ( Ans: Zinc blende ( ZnS ) )
19. The sulphide ore of Iron is ..................( Ans: Iron pyrite (Fe₂S ) )
20. ................... is the most abudent meal in the earths crust. (Ans: Aluminium )
21. The metal which produced by the process Hall's electrolytic reduction ............. (Ans: Aluminium )
22. The pure aluminium deposits at ....................... by Hall's process. (Ans: Cathode )
23. The ............... is  the acid which the aluminium will not treat.     ( Ans: dil.con. Nitric acid )
24. The alloy which the aeroplan parts are made from .................. because it is very ..............   ( Ans: Duralumin , light )
25. The important ore of coper is ......................... ( Ans: Copper pyrite ( CuFeS₂  ) )   
26.  The important sulphide ore of copper is ................... (Ans: Copper Glance ( Cu₂S ) )          
27. The copper ore is concentrated by the method of .................... (Ans: Froth flotation process )
28. The past product of matt during bassemerisation is ......................... (Ans:  Cu₂S +FeS )
29. The percentage of blister copper is .................... (Ans: 98 % )
30. The reddish brown colour metal is .................. ( Copper )
31. ................... is the metal used to make electric  cables and electric appliances. (Ans: Copper )
32. ................... is the metal used to make utensil , containers, colorimeter, coins and electroplating .  ( Ans: Copper )
33. ..................... is alloyed with gold and silver for making coins and jewels.    ( Ans: Copper )
34. ................... is the metal gryist white in colour.   (Ans: Iron )
35. ....................is the second most abudent metal.  ( Ans: Iron )


    

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