How do hot-air balloons float? What is air made of? How is water power used? How does pollution affect our air and water supply? This book answers these questions and many more.
"synopsis" may belong to another edition of this title.
David Glover, a former teacher and research scientist, has written many science books for children including Young Discoverers: Science Facts and Experiments.
"About this title" may belong to another edition of this title.