Moon Phases
The phase where the Moon appears completely dark because the sunlit side is facing away from Earth. What is this phase called?
What is the New Moon?
This eclipse happens when the Moon moves between Earth and the Sun.
What is a solar eclipse?
The Sun is this type of object in space.
What is a star?
This daily motion of Earth causes day and night.
What is rotation?
This substance makes up about 75% of the Sun's mass.
What is hydrogen?
The length of time it takes the Moon to complete its cycle of phases (from one New Moon to the next).
What is about 29.5 days (or a lunar month)
This eclipse happens when Earth’s shadow falls on the Moon.
What is a lunar eclipse?
These dark, cooler regions on the Sun’s surface appear in cycles.
What are sunspots?
It takes Earth about this long to make one full revolution around the Sun.
What is one year (365 days)?
The astronomical event that can only occur during the Full Moon phase.
What is a lunar eclipse?
The phase where you see exactly half of the Moon illuminated, which occurs after the Waxing Crescent phase. What is this phase called?
What is the First Quarter?
The darkest part of Earth's shadow during an eclipse is called this.
What is the umbra?
The Sun gets its energy from this process, which fuses hydrogen atoms.
What is nuclear fusion?
Earth rotates from this direction to this direction.
What is west to east?
The celestial body that has the greatest influence on Earth’s tides.
What is the Moon?
This phase occurs right before the new moon and shows only a small sliver of light on the left side.
What is the waning crescent?
The two reasons eclipses do not occur every month during the New and Full Moon phases.
What are the Moon’s orbital tilt and the required alignment of the Earth, Moon, and Sun?
The layer of the Sun that we can see from Earth is called this.
What is the photosphere?
This imaginary line runs through the North and South Poles and is the axis Earth spins on.
What is Earth’s axis?
The bowl-shaped depressions on the Moon, formed by impacts from asteroids and meteoroids.
What are craters?
When more and more of the Moon becomes visible, it is doing this.
What is waxing?
The area where the Sun or Moon is only partly covered by the other body, resulting in a partial eclipse.
What is Penumbra?
Streams of charged particles from the Sun that can cause auroras on Earth.
What is the solar wind?
The tilt of Earth’s axis combined with its revolution causes these changes throughout the year.
What are the seasons?
The diameter of the Sun is about 109 times larger than the diameter of this celestial body.
What is Earth?