Day and Night
This motion of the Earth causes day and night.
What is Rotation?
This motion defines one year on Earth
What is the Revolution of the Earth?
This feature creates dark spots on the moon.
what are maria?
These events are caused by changing patterns of light and shadow.
The length of time it takes for the Earth to complete a full rotation on its axis.
what is 24 hrs (1 day)?
This characteristic of the Earth causes the four seasons.
What is Earth's tilted axis?
What is the revolution (or rotation) of the Moon?
This phase occurs when the moon is between the Earth and Sun in approx. alignment.
What is a new moon?
The apparent path of the Sun across the sky.
What is the ecliptic?
Every four years, this special day is added to the calendar.
Leap Year, February 29
This phenomenon occurs when you combine the tilted orbital path of the Moon and its elliptical orbit.
What is libration?
This phase occurs when the moon is at a right angle to the Earth and Sun.
What is a first quarter or third quarter moon?
This time of day occurs in Sydney, Australia, when it is daytime in Odessa, Texas.
What is night?
This season occurs in the Southern Hemisphere when it is summer in the Northern Hemisphere.
What is winter?
This phenomenon is caused by the gravitational pull of the Earth.
What are tides?
Length of a sidereal period.
What is 27 days?
the motion during the daytime that makes it seem like the Sun and stars are revolving around the Earth.
What is diurnal motion?
An angle of 23.5 degrees.
What is Earth's tilt?
A natural phenomenon in which the moon's revolution and rotation on its axis are locked together, so that a revolution and rotation both take 27 days.
What is synchronous rotation?
Length of a synodic period.
What is 29.5 days?