Introduces the idea that animals can be classified into groups according to the characteristics they have in common, and shows the ways that different types of mammals, birds, reptiles, amphibians, fish, and invertebrates are alike.
Simple text and photographs introduce the concepts of seeds, bees, and pollen and how they contribute to the reproduction of different types of plants.
Introduces electricity; describes how it is made, transferred from the power plant through power lines into the home, and used; and explains how batteries work.
Introduces habitats and how they provide everything the creatures living in them need, and describes how different parts of the food chain, including producers, consumers--herbivores, carnivores, and omnivores--and decomposers contribute.