Earth in Motion
This daily motion, caused by Earth spinning on its axis, makes the Sun and planets appear to rise in the east and set in the west.
Rotation
These are the two primary causes of Earth's cycle of seasons.
Earth's tilt and its orbital motion around the sun.
This term describes moon phases where the lit portion of the moon's near side is increasing each night.
Waxing
This is the primary force responsible for causing tides on Earth.
The Moon's gravity.
This type of eclipse occurs when the Moon moves directly into Earth's shadow.
Lunar eclipse
This is the specific angle at with Earth's axis is tilted relative to the ecliptic.
23.5 degrees
This event occurs when the Northern Hemisphere is tilted most toward the Sun, resulting in the longest day of the year (June 21).
Summer solstice
This specific moon phase occurs when the moon is directly between the Earth and Sun, making it appear completely dark from the Earth.
New Moon
Earth typically experiences this many cycles of high and low tides every 24 hours.
Two
A solar eclipse can only occur during this specific moon phase.
New Moon
This type of day is the time it takes for Earth to complete one full totation relative to the stars, lasting approximately 23 hours, 56 minutes, and 4 seconds.
Sidereal day
This term describes a day with equal hours and night, ocurring in both March and September.
Equinox
This is the number of days it takes for the moon to go through one complete cycle of phases (a lunar month).
29.5 Days
These tides occur when the Sun and Moon are lined up, causing high and low tides to be exaggerated.
Spring tides
A lunar eclipse can only occur during this specific moon phase.
Full moon
This is the imaginary line that passes through the Earth's center at the North and South poles.
Axis
During these two seasons, the Northern Hemisphere is tilted away from the sun.
Fall and Winter
In the Northern Hemisphere, if you see a half-moon with the left side illuminated, the moon is in this specific phase.
Third (or Last) Quarter.
Spring tides occcur during these two moon phases.
New Moon and Full Moon
This type of eclipse occurs when the shadow of the Moon appears on the Earth's surface.
Solar eclipse
As Earth rotates, the Sun and planets appear to move across the sky along this specific path.
The ecliptic
While the Northern Hemisphere is experiencing summer, the Southern Hempisphere is experiencing this season.
Winter
We always see the same side of the moon (the near side) becasue of this phenomenon involving the Moon's rotation and revolution.
The Moon rotates at the same speed it revolves around Earth.
These tides occur when the Sun and Moon are at right angles, causing gravitational forces to partially cancel out and resulting in a small tidal range.
Neap tides
True or False - The plane of the Earth's orbit is circular.
False