Earth in Space Vocab

Front

Imaginary line through Earth's center:

Back

axis

Front

Earth's spinning on its axis is called

Back

rotation

Front

Earth's path around the sun is a

Back

revolution

Front

Path Earth takes around the sun

Back

an orbit

Front

A system for organizing time that defines the start, duration, and divisions of a year, originally based on moon cycles.

Back

calendar

Front

Winter and Summer occur when the sun is farthest north or south of the equator, known as a

Back

solstice

Front

Autumn and Spring occur when neither hemisphere is tilted toward or away from the sun, resulting in equal day and night lengths.

Back

an equinox

Front

Northern Hemisphere receiving direct sunlight:

Back

Summer

Front

Season in Southern Hemisphere?

Back

Summer