« se ee As each tiny thing (atom) changes it produces a kind of energy which we cannot see whanged, and which fa called "radiation." thia anergy ig gone from Chem. appears on page 4.) | When they have complately (Further explanation of radiation | Of the things that are radioactive some have always: bean a park of the world. These are God-made and they will not go away. They are in soil, in water, in food-bearing planta and other plants, in animals, and in our bodies. There are also radioactive things that came from the atemic bombs. ef these changed quickly ~ during just a few minutes or days. Some But the others change slowly am! are still present on the islands in the Bikini Atoll. names of some of the important radioactive things are strontium, plutonium, and americium. after 5 years. Of the part that remains, cesium and one-half of the strontium will that remains, one-half will cesiua, One-half of the oobalt will digappear one-half will Another § years and Lhis process wil] continue indefinitely. part cobalt, Tha disappear after One-half of the disappear after 30 years. Of the disappear after another 30 years. procas3 will again continua indefinitely. This Plutonium and americium will not change over hundreds and hundreds of years. ENERGY CALLED RADIATION Tne energy from radioaclive materjlals is similar to heat of fire and light of the aun in that it travela from Where it is formed to other places; however, wea cannot see it, hear it, taste it, amell jt, or feel it. int