This video lesson is an aside from Chapter 11. It provides some perspective on the history of modern chemistry by way of a timeline dating back to the beginnings of our planet. The location of our planet in the universe is also addressed. Duration: 8:29
VIDEO CHECK QUESTIONS
11.12a How did humanoids protected themselves from the dinosaurs? Use dates from the timeline to support your answer.
11.12b What evidence suggests that people were transforming materials as far back as 20,000 years ago?
11.12c What development led to the beginning of the Iron Age?
All video check questions can be downloaded from the EXTRAs menu.