- One of few titles for this age group that covers various forms of alternative energy
- Petersen explains a complex topic in a clear and easy-to-understand manner
- Covers principles of physical science as well as the technology of alternative energy
National Science Standards: Grades K-4
- Science and Technology: V. Content Standard E
- People have always had problems and invented tools and techniques to solve problems
- Some objects occur in nature; others have been designed and made by people to solve human problems and enhance the quality of life
- Physical Science: II. Content Standard B
- Materials can exist in different states--solid, liquid and gas. Some common materials can be changed from one state to another.
- Objects have many observable properties, including the ability to react with other substances.
- Heat can be produced in many ways, such as burning, rubbing, or mixing one substance with another.