Activity 3.1: Large-Scale Four Questions (20 min)


1. Use the instructional model to show students where they are in the course of the unit.

Show slide 2 of the 3.1 Large-Scale Four Questions PPT.


This unit builds on previous knowledge about organic versus inorganic carbon and the carbon-transforming process of photosynthesis, biosynthesis, decomposition, and cellular respiration. If students experience difficulty making the connections in this activity, they should be provided further instruction or review before moving on.

  • Provide students with additional examples or references of carbon-transforming processes (biosynthesis, photosynthesis, cellular respiration) and/or organic and inorganic carbon.
  • Use and refer to a word wall for questions on vocabulary related to transforming processes.
Extending the Learning

Compare the Three Questions with the Four Questions. How are they alike? How are they different?