Unpacking the Standards
The Phenomenal Science Units were developed with a backwards design approach as described by Wiggins and McTighe. This means that the first step to understanding what must happen in a unit is to truly understand what is in the Michigan Science Standards / Next Generation Science Standards bundled in that unit. You can see the bundles of the standards in the Pacing and Alignment Guide (go to the Units page). The following resources and information are helpful in understanding the three dimensions of the standards and how they work together.
Some further helpful resources are:
In the blog Connecting Anchoring Phenomena with the Nature of Science and Engineering, the author has a good description of how you could use the same phenomenon to tackle both an engineering problem and a science question.
Appendix I of f the NGSS explains more about the inclusion of Engineering in the standards. It gives these progressions across Elementary grades:
In the units, there should be at least one engineering problem tackled in most units. Usually this will occur after the the phenomenon has been explored with scientific questions toward the end of an IC or even the end of the unit.