How sand dunes are formed
By: Shekinah Quinnett-Cook
The extensive sand dunes that cover areas, such the Saharah Desert and other sandy desert terrains, are called dune fields. Sand dunes vary in shape and size, and are formed by the velocity of the wind. Sand dunes tend to be longer on their side...
How solar powered batteries work
By: George Leard
How Solar Powered Batteries work Solar powered batteries or Photo-Voltaic Cells works through the process where sunlight is converted to electrical energy, without passing through the heat generation phase. When sunlight, bearing energy packets called photons, are made to hit directly upon the interconnected rows...
By: Cameron Scott
There are three major temperature scales: Celsius, Kelvin, and Fahrenheit. It's easy to convert between them. All you need is a few simple tricks. Celsius and Kelvin degrees measure exactly the same temperature difference. The scales are different only because the Celsius scale uses the...
By: Peter Truman
Weather forecasting has been an important part of mankind’s lifestyle down through the ages. The weather has always been and will always be an important topic of conversation because of the impact it has on everyone’s life. We are all very dependent on...
By: Sylvia Farley
Prior to 1968 the UK had a well-trained volunteer army ready to move in the event of disaster. They were skilled in first aid, evacuation of threatened areas, rescue, communications, forward planning, catering, instructing the public to prepare fall-out shelters, estimating severity and extent of...
By: Jennifer Watson - 582581
Geodes are geological rock formations. They occur in both sedimentary and certain types of volcanic rocks. Geodes are vugs (a small cavity or hollow space inside a rock). They have concentric banding which means they share a common center. They also have internal crystal formations...
By: Dr Pandula Siribaddana
Solar energy is the main energy source sustaining life on planet earth and extending its usefulness to fulfill human needs is one of the research priorities around the world. Use of solar power as an alternative energy source have been studied for many decades and...
Solution for the energy crisis: Solar power
By: Bruce Lee1
People always ask, "how is solar power the solution behind our energy crisis?" The response is rather simple. With the sun’s natural light, we can produce more than 50 percent of the energy used on a daily basis by businesses, consumers, and even...
By: Janet Grischy
A geode is a hollow rock, sometimes with a fantastic growth of glittering crystals within it and sometimes lined with silky forms of chalcedony such as striped agate, jasper, or opal. Some geodes hold stunning combinations of smooth stone and sharp crystals. Because they’re...
By: Damian Taylor
A hurricane is a severe tropical storm which produces powerful winds, heavy rain, high waves and storm surges. It can have a devastating effect, as can be seen from the impact of Hurricane Katrina on the city of New Orleans. On average around 90 tropical...

 

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