Автор:Janice VanCleave Год: [не указано] Издание: [не указанo] Страниц: 224 ISBN: 9780471328209 An all–new collection of first–rate science experiments! Are you having a hard time coming up with a good idea for the science fair? Do you want to earn extra credit in your science class? Or do you just want to learn more about how the universe really
