Introduces material and states of matter and provides experiments to investigate how potholes and caves are created, how stalactites form, and how volcanic eruptions occur.
An introduction to different kinds of rocks and soils describing their characteristics, location, and uses. Includes study questions, activities, and experiments
Describes the seeds produced by different kinds of plants, how they spread, germinate, and grow into a new plant. Includes study questions, activities, and experiments
An introduction to such materials as wood, rubber, coal, oil, and plastics, describing their characteristics and usefulness. Includes study questions, activities, and experiments.