Do you have a project-assignment fron your physics teacher and do not know where to begin? Or, you have to participate in a Science Fair,and you wish to surprise everyone with a revolutionary chemistry model? Or, you simply wish to experiment with new concepts of physics,electronics,biology and chemistry? This revised book and the free CD contains 71+10 new projects on Physics, Chemistry, Biology and Electronics. The purpose of the book and CD is to ensure simple explanations of these 81 Science Projects done by Secondary and Senior Secondary students. This book will be a useful guide in the preparation of project work for students participating in science exhibitions. At the end, the book features many additional projects to work upon. Highlights: *Making an automatic Electric Alarm. *Making a Railway Signal. *Making an Astronomical Telescope. *Producing electricity from potatoes. *Making the Morse Code. #v&spublishers CONTENTS: 1. Making and controlling a diver 2. Making an abacus 3. Using your abacus for calculations 4. Making a stroboscope 5. Making a weather-indicating flower 6. Demonstrating how clouds are formed 7. Making a siphon fountain 8. Making a model of an elevator 9. Determining the surface tension of water 10. Making a spinning snowman 11. Making a hovercraft 12. Making a clinometer 13. Making an automatic rain-gauge with time indicator 14. Making ah anemometer 15. Making an air thermometer 16. Making a wave machine 17. Making a kaleidoscope 18. Making a periscope 19. Making a slide projector 20. Making an astronomical telescope 21. Making a Galilean telescope 22. Making a Newtonian reflecting telescope 23. Making an interferometer 24. Making a strain viewer 25. Making a polarimeter 26. Making a direct vision spectroscope 27. Producing electricity from potatoes 28. fvlaking a dry cell 29. Converting solar energy into electrical 30. Making traffic lights 31. Makil'\g an electromagnet 32. Making a magnetic crane 33. Demonstrating electromagnetic induction 34. Demonstrating &.eectacular levitation 35. Making an electric motor 36. Making an electric buzzer 37. Making a galvanometer 38. Detecting current" using the galvanometer 39. Making an electric board of birds' questions 40. Making an electric quiz board 41. Making a railway signal 42. Making a thermoelectric generator 43. Making a chimney for controlling smoke pollution 44. Making an. automatic letter alarm 45. Making a Morse code for sending messages 46. Making a fire alarm 47. Switching on a table lamp by a match tick 48. Making an electronic burglar alarm 49. Making a touch alarm 50. Making an electronic timer 51. Making a portable metal detector 52. Making a telephone recording interface 53. Making a light sensitive LOR alarm 54. Making an automatic twilight switch 55. Making a radio set (using a semiconductor) 56. Making a radio set (using a variable capacitor) 57. Making iodoform 58. Detecting adulteration in ghee 59. Extracting fat from oilseeds 60. Finding the composition of water by electrolysis 61. Electroplating a brass key with copper 62. Making a fire extinguisher 63. Making a model active volcano 64. An alternative model of a volcano 65. Demonstrating the destructive distillation of wood 66. Making a chemical photoelectric cell 67. Making a chemical garden 68. Growing crystals of copper sulphate 69. Growing plants without soil 70. Demonstrating the feeding of yeast on sugar 71. Demonstrating the phenomenon of photosynthesis 72. Making an automatic cut off timer 73. Making a direction indicator arrow 74. Making a lie detector based on the changes of skin resistance 75. Making an IC based fire alarm 76. Making a multitone bell 77. Making a water-level indicating alarm 78. Making a power failure indicator 79. Making dancing or disco lights 80. Making a battery operated tube light 81. Making a two transistor radio 82. Important symbols used in electronic circuits 83. Additional projects you can try