Secreted by the , plays a role in regulating biological rhythms and immune function.

The nervous system is composed of two basic cell types: , which are thought to provide a supportive role to the other cell type , which serve as interconnected information processors essential to all tasks of the nervous system.

Which of the following types of Fronts is a boundary between warm and cold air masses, but may not move for hours or days?

Which of the following is false regarding thunderstorms?

Cloud types with “nimb” or “nimbo” in them imply:

Hail is most common in the ___________, after warming of the land promotes instability.

From our plastic ocean discussion we learned:

The more sinuos a stream, the more it ____________.

Which of the following is correct? A. clay = low porosity B. rounded sorted clasts = high porosity C.  granite = high porosity

Pick which one of these is the oldest?   BYO = billions of years old