Nancy Larson® Science 2 focuses on the physical world. Children are becoming more inquisitive about the things around them and how things work. The lessons begin with living and non-living things with an explanation of matter. The properties of matter help to provide a lead into geology and characteristics of rocks. From here the lessons progress into how things move (force, gravity, friction, and work), which leads right into simple machines. The last part of the physical world covered is sound and light. From these concepts of the physical world, the children bring this knowledge to life science with lessons on birds. Not only are the stages of life readdressed, but also how the physical science applies to birds by discussing things such as how birds move, their beaks and how they use them, the sounds they make, and other physical characteristics of birds.