Lesson 4 Flashcards
In the northern hemisphere the day, with the most daylight is called the
Summer solstice
In the northern hemisphere, the day, with the least is called
Winter solstice
The day on which there are 12 hours of darkness and 12 hours of daylight everywhere on earth is called
Equinox
An equinox is the first day of spring is called the usually occurs on March 21
Autumal equinox
An equinox that is the first day of autumn in the northern hemisphere is called the
Autumnal equinox
The center portion of earth composed, mostly of iron, is called the
Core
The outer portion of earth near at the surface that has a low density is called the
Crust
The theory that says the earths surface is divided into several large plates of hard rock that floats on top of a plastic layer of rock underneath is called
Plate tectonics