Movement of a gas or liquid caused by changes in temperature.

The mass per unit of volume.

Tells how much light a surface reflects back. Varies based on the type of surface the sunlight hits.

Feedback loop that speeds up a process. This type of feedback loop tends to add or take away too much. These feedback loops tend to snowball out of control.

Feedback loop that slows down a process. This type of feedback loop tend to return systems to balance. Changes are met with equal and opposite changes to return back to a "normal" state. This type of loop is most common in nature.