Science explains how the world works, and how life exists. Scientific discoveries have made our lives healthier and longer than ever before. Science give us understanding about where we come from, how we grow in our mother’s womb, how our body functions, and how we can avoid illness. Scientific knowledge affects every aspect of our lives and our understanding of the plants and animals around us. And science starts with experiments. Doing experiments, seeing what happens as we explore the nature of things around us, is the object of this book.