SEM Part 2 Vocab Review

Front

Axis:

Back

An imaginary line through the center of an object.

Front

Northern Hemisphere

Back

the half of the earth that lies north of the equator

Front

Southern Hemisphere

Back

the half of the earth that lies south of the equator

Front

Season: one of four natural parts of the year on Earth, determined by its rotation and revolution around the sun.

Back

one of four natural parts of the year on Earth, determined by its rotation and revolution around the sun.

Front

Equinox

Back

Times each year (around March 21 & September 23) when the sun crosses the equator, making day and night equal everywhere.

Front

Solstice

Back

Two points on the ecliptic where the sun is farthest from the celestial equator, occurring around June 21 and December 21.

Front

Tilt

Back

23.5° relative to Earth

Front

Aphelion

Back

The point farthest from the sun in the path of an orbiting celestial body.

Front

perihelion

Back

the point closest to the sun in the path of an orbiting celestial body (e.g., a planet)

Front

Summer

Back

A point in Earth's revolution where a hemisphere receives direct sunlight.