Category #1
Earth's movement around the sun is called
Revolution
These two points describe when Earth is closest to and farthest from the Sun in its orbit
perihelion & aphelion
Earth is tilted at approximately how many degress
23.5
The longest day of the year is called
summer solstice
The point in the Moon's orbit when it is closest to Earth
perigee
Earth spinning on its axis is called
Rotation
This is the point in Earth's orbit when earth is CLOSEST to the sun?
Perihelion
The name of the angle of Earth's tilt is
axial tilt
The shortest day of the year is called
winter solstice
The point in the Moon's orbit when it is farthest from Earth
apogee
This is the slow, gradual wobble of Earth's axis over thousands of years (or a long time)
Precession
This is the point in Earth's orbit when Earth is FARTHEST from the sun
aphelion
This occurs when there are approximately equal amounts of daylight and darkness
Equinox
Earth spins in what direction
WEST to EAST
Approximately this much of the Moon is always illuminated by the Sun.
about 50%
A solar day is based on Earth's rotation relative to the sun, while this type of day is based on Earth's rotating relative to distant STARS
Sidereal day
Earth reaches perihelion around this time of year
January
Equinoxes occur during what TWO seasons
Spring & Fall
From above Earth's North Pole, Earth rotates in this direction
COUNTERclockwise
The light we see illuminating the Moon comes from this object.
The sun
Earth travels around the sun in this type of orbit
elliptical orbit
July
The longest and shortest days of the year are associated with this astronomical event
solstice
Because Earth rotates from west to east, the Sun appears to move across the sky in this direction
EAST to WEST
About how long does each of the eight main Moon phases last?
about 3-4 days