Free audio · Chapter 9 of the workbook
Chapter 9 of the GED Test Prep Workbook 2026–2027. Press play and work the chapter with the lesson in your ear — the examples talked through here are printed, with fully worked answers, in the book.
Two talked-through experiments (what changed, what stayed the same, what was measured), energy changing form on a bike ride, and the seasons and water cycle as one connected story.
About 6 minutes. If this lesson has not been posted yet when you scan the chapter's code, this page still routes you: the chapter's printed worked answers carry the full content, and the lesson joins them here the moment it is recorded. All audio is free.
Your plan comes first. Not sure this is your next chapter? The free Readiness Planner orders the subjects from your own scores, and the workbook page shows the full chapter map.