Safety pins and skyscrapers, scissors and steamships, automobiles and airplanes—none of these things could be made without the mineral called iron. Iron is a metal, like copper and tin and bronze….
Large electromagnets can lift heavy loads. This one picks up and stacks big blocks of crushed iron and steel in a junkyard. Electricity can make light and heat. It can also make a magnet—one that…
In India, a wise and holy person is called a mahatma (muh muh). The title means \”great soul.” The greatest mahatma of all was Mohandas Karamchand Gandhi. He is known as the \”father of India.” As…
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