All Science Fair Projects for School Students

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Secret Messages

We all are familiar with ink. It is the fluid inside a pen that allows us to communicate with others through written text. But, most often the communication is not exclusive, that is, anybody who can see the writing on the paper can in principle read the message written on it. Situations are possible when we would not like it to be so, that is when we want to communicate a secret written message. Is it possible? Definitely, science can make it possible. One can make an ink which instead of a dye solution (a coloured solution) has a colourless solution which can be made visible by some method. That is precisely the principle of invisible inks. An invisible ink is a solution which can be used to write with. The written message is either invisible on application or disappears quickly. It can be made visible by some means. The use of invisible ink is a form of steganography, and has been used by spies. The simplest invisible inks are organic compounds -- vinegar, lemon juic

Make a Rocket

Rockets are fascinating! They soar into the sky and help us know many secrets. Are you fascinated by rockets? If your answer is yes, you would be interested in this activity. The rockets that you can make safely will not go very far, perhaps much less then the rockets we enjoy on the Deepawali day. But then you will agree, the fun and excitement to make your own rocket has a totally different dimension. The basic principle of rocketry is Newton's Third Law of Motion, that is, "For every action there is an equal an opposite reaction". A big rocket uses chemicals to release an intense stream of gas out its tail end that propels it upwards. A fuel is used in a rocket to produce this gas through some chemical reaction. The rocket fuel is sometimes liquid, and sometimes solid. But, in all cases, a gas is ejected from the tail of the rocket. The first kind of rocket that we can make is propelled by a very safe gas - carbon dioxide. The fuel it uses is

Make a Hovercraft

A hovercraft is a vehicle which travels across land or water just above a cushion of air provided by a downward jet, as from its engines and propellers. It finds extensive uses for sports as well as military purposes. Commercial hovercraft can carry passengers, vehicles, and freight. Some can travel as fast as 130 km per hour. You can not definetly make such a vehicle, but you can make a model that illustrates its principle of operation. It's rather easy. All you need is a waste compact disk (CD) (The disks that are used to dispense computer software, games, music and films), a discarded PET bottle (the kind that is used to dispense soft drinks, cooking oil or drinking water), a big balloon and some adhesive. The method of construction is as follows: Cut the head of the PET bottle along with its cap with the help of a hot knife. Remove the plastic ring, if any, used for sealing. Fix the bottle cap in the center of the CD with the help of the adhesiv

Make an Anemometer

We have all felt the blowing of wind. Sometimes it is fast and sometimes gentle. Can you definitely assert that the speed of wind at a particular instant of time is more or less then at a different time? An anemometer is a device that can help you measure the speed of wind. You too can build is a model of an anemometer to measure the speed of wind yourself.. A real one will be able to accurately measure how fast the wind is blowing. Yours will give you only approximation of how fast it's blowing. It can't give you an exact wind speed. The energy in the moving wind can be used to generate electricity. But you have to know how fast the wind is blowing before you can harness wind power. All you need to make an anemometer model is: 4 disposable cups/glasses/bottles. They can be either the cups used for serving tea/coffee/ice cream, or tumblers used for dispensing softdrinks (e.g. fountain Pepsi), or bottles for dispensing drinking water. In addition you would need:

Make a Sundial

Shadow sticks or obelisks are simple sundials. If the sun rose and set at the same time and spot on the horizon every day, they would be fairly accurate clocks. However, the sun's path through the sky changes every day because the earth's axis is tilted. On earth's yearly trip around the sun the North Pole is tilted toward the sun half of the time and away from the sun the other half. This means the shadows cast by the sun change from day to day. Sundials only measure local solar time. If a friend had a sundial 5 degrees longitude to the west of your sundial, his sundial would read a different time than yours. This is a simple calculation: the earth turns 360 degrees in about 24 hours, therefore the sun's apparent position moves 360/24 = 15 degrees each hour. So your friend's sundial would read 20 minutes different (earlier) than yours. This difference is only affected by longitude, not latitude. To standardize things, the earth was divided into 24 time zo

Make a Radio

Do you have a transistor radio at home? No? A Transistor radio is great fun; you can listen to music or news almost anywhere. Do you know what a transistor radio is? A transistor radio (or transistor) is a small, often handheld, radio receiver. You can buy a transistor radio these days for as little as Rs. 50. The transistor radios sold in the market require an external power source -- electricity from the mains or from a dry penlight cell. You can make a transistor radio that does not require any form of electrical source to operate. All you need is a few electrical/electronic components. These should be easy to get provided you have some electronic repair shop or a shop that deals in electronic components. The components that you will need and how to get them are described below. You will need several meters of something called enameled wire. Enameled wire is copper wire, coated with dark colored enamel paint. It's thickness is measured in ‘gauge’. What

Make an Electroscope

An electroscope is a device that is used to demonstrate properties of static electricity. Static electricity is a phenomenon that takes many forms. It can be an electric shock you can get after walking over a carpet, or it can be a lightning bolt from the sky. The electroscope demonstrates the repulsive force that is exerted between two nearby objects with the same electric charge. In this activity you will learn to make your own electroscope. You won't need any exotic materials for this activity, all that is needed is readily available and can even be found in your house. First of all you must brush-up your knowledge about static electricity. The following links can help to a large extent; they have been listed according to their level of presentation: To make an electroscope all you need is listed below: 1. An empty glass jar such as a jam jar. 2. A length of stiff copper wire about 12 cm long (or a large steel paper clip). 3. A sheet of aluminum kitchen f

All Science Fair Projects for School Students

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Kids Projects at Home

Secret Messages

Make a Rocket

Make a Hovercraft

Make an Anemometer

Make a Sundial

Make a Radio

Make an Electroscope

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