Lets make a string phone!
Sound waves are longitudinal waves with frequency between 20 Hz and 20,000 Hz, that travel through air, solids or liquids. Materials: 2 paper cupboards 3m string Procedure: With a pencil make a small hole in the bottom of each cup and pass the end of the twine inside each cup. Tie 3 knots at the ends…
Read More
Floating Egg!
Materials: • An egg• Glass of water• Salt Procedure: Fill a glass with water and place the egg into it. Notice that it sinks. Add salt into the water and stir until it is dissolved. The egg is now floating!! Explanation: The egg will sink in water because its density is higher than the density…
Read More
Bouncing Eggs!!
Materials: • An egg• Glass• Vinegar Procedure: Fill a glass with vinegar and let an egg soak in it. The next day notice that the egg has turned into a rubber ball. You can now bounce it!! Explanation: The eggshell is made of calcium carbonate which makes it hard. The calcium carbonate will absorb the acid of the vinegar…
Read More
Remove a coin from water without getting wet
Materials: Candle Glass plate coin water Procedure: Place a coin on a plate and pour a little water. Light a candle and place it in the middle of the plate. Cover the candle with an inverted glass and watch the water sucked up in the glass!! Explanation: The oxygen in the glass is consumed in…
Read More
Upside down Glass of water without spilling
The earth is surrounded by atmosphere. The atmosphere consists of a mixture of gases called atmospheric air. Atmospheric air exerts pressure (atmospheric) on each body inside it, which is due to the weight of the air. Materials: Glass of water Piece of Paper Procedure: Fill a glass with water and place a piece of paper…
Read More
Build a simple Electric Generator
Generators are the devices that convert kinetic energy into electricity. The operation of the generators is based on the induction phenomenon, according to which, if a magnetic field moves close to a conductor an electric current will flow in the conductor. Materials: 2 rubber ringstest tubeLED lightpowerful magnetscopper wire Procedure: Place the magnet and the…
Read More
Mixing Colors Experiment
Procedure: What color do you see when you throw at the same time on a white surface: Green and red light Green and blue light Blue and red light Green, blue and red light Explanation: White light consists of radiations corresponding to each color such as red, orange, yellow, green, blue, indigo and violet .…
Read MoreMoving Images experiment
Procedure: Draw on a piece of paper a cage and next to it a parrot. Stick the back of the rafts together and rest them on a straw. Spin the straw with your palms and watch the parrot in the cage!! Explanation: Our eyes maintain the impression of an image for 1/10 of a second.…
Read MoreLiquid Density Experiment
Materials: Olive oilAlcoholRed wineGlycerin Procedure: Pour the liquids inside a glass. Notice that the liquids with the highest density sink while the liquids with the lowest density float. Your layer density tower is ready!!
Read MoreMake a lemon battery
A battery is a device that stores chemical energy and converts it to electrical energy through chemical reactions. Materials: Four lemonsFour zinc nailsFour copper coinsFive crocodile wires and led Procedure: Place the coins and the nails on each of the four lemons as shown in the top images. Connect the nail on one lemon to the…
Read More