Topics Related to Cause and effect: Mechanism and explanation

Did you see an Armadillo in North Carolina?

What is that strange orange growth on this tree

Phenomenon Description: Unusual orange growth on an Eastern Red Cedar. 
Location: North Carolina 
Question: Is this an organism or part of the tree and how did it get there? 

Why are the Blue Ridge Mountains Blue?

Phenomenon Description: Blue Hue of the Blue Ridge Mountains 
Location: Blue Ridge Mountains
Question: Why are the Blue Ridge Mountains Blue?
Crosscutting Concepts: 

How did the dandelion get there?

Phenomenon Description: Yellow dandelion plant in the middle of a grassy downtown area.
Location: Raleigh, North Carolina
Question: How did the dandelions get there?