Effects of Microwaves Materials Required: An adult A microwave Twelve bean seeds Potting soil An egg carton Marker Some water Paper and pencil The electromagnetic rays from microwaves radiate strong force, which can be harmful to people. This is why, they are designed in a special manner, with switches on the oven doors. The switch turns the power off, when someone opens the door. This keeps the user safe from the...

Distribution of Solar Energy Materials Required: Nails A six-inch long piece of wood A fishing rod and reel Strings A thermometer Also an aquarium thermometer Metal washers Pencil and paper Are all the parts of a water body heated uniformly by the sun’s rays? Like in a lake does the temperature of surface water is the same as the water several feet down? Take a guess which will be warmer, water...

Heat from The Sun Materials Required: Strings Two thermometers A long, pointed stick A body of water Pencil and paper An adult The sun is the prime source of heat for our planet. Owing to the rotation of the earth, the sun sets in the evening and the surface begins to cool down by losing heat. This experiment is intended to find out what looses heat faster – the land or...

Condensation and Water Vapour Materials Required: One-litre plastic soda bottle Dinner plate Kitchen table Water Use of a freezer Pencil and paper Did you ever find the ground wet early in the morning, even though it hadn’t rained? That water, all over the surface of the ground, is Dew. Tiny droplets of water exist in the air but are too tiny to be seen. If the water in the air increases,...

Changing Temperatures Materials Required: Four empty 2-litre plastic bottles A 2-litre cola bottle Five thermometers Strings Five sticks Table Sunny window Red, blue and yellow food colouring Pencil and paper Clock An ice-skating ring was developed in the area. A big ring was formed out of asphalt and it was filled with water. In winter, the temperature dropped well below freezing point. However, the water in the ring never froze. Maybe...

Changing Environments Materials Required: An adult with a drill Plastic soda bottles with screw caps A large pail Small stones Three feet of plastic Aquarium tubing rubber band While some air carriers are known as heavier-than-air (like airplanes and helicopters), there are also some carriers, which are lighter-than-air (like balloons and gliders). These gas balloons are still less than the weight of the air that would take up the same amount...

Into Thin Air Materials Required: Measuring cup Soda bottle Pie plate Water The change of liquid into vapor is known as Evaporation. Water evaporates into the air. Morning dew collected on a leaf is concentrated by noon on a hot day. How long will a cup of water take to evaporate? There are certain factors involved in it, namely movement of the air, its dryness and the temperature. Among those, the...

A Natural Screen Materials Required: 1. Art and construction supplies A good way to contain the heat energy in the house and also to lower the energy costs would be to protect the house from strong, cold winter winds. Take the example of farms. Due to the large expanse of land surrounding the farmer’s land, where he carries out his farming, you see long rows of tall trees around the house,...