This is the teacher's guide for Unit 4. Contains essential background for each section, elaboration on nuances and challenging material, explanations of some simplified models. Includes solutions for all Practice Problems, Extending Ideas, and other formative questions presented in the main text. Also provides equipment lists for each experiment and activity, teacher instructions, expected outcomes of each activity, and additional supplemental material. This text is an essential adjunct to any instructor using the Action Science textbook.
