“Terrestrial Planets”
23.2

Mercury
•	Smallest
–	Not counting Pluto!
•	Craters, Highlands, & Maria
•	Slow Rotation = 59 Earth Days.
–	Night = 3 months. (Very Cold)
–	Day = 3 mo. (Suuuper Hot)
Venus
•	“Earth’s Twin”
–	Size, shape, density, location.
•	“V” for Volcano!
–	Tectonics
•	Greenhouse Effect
–	97% CO2
–	Hottest Planet!
Mars
 “Red Planet”
•	Cold!
–	Polar Caps!
•	Thin Atm. 
–	Mostly CO2
–	Cold!
•	“M” is for “More Volcanoes!”

•	Water!