EMS System
Seasons
Moon Basics
Moon Phases
Eclipses
100
What is the difference between a rotation and a revolution?
Rotation is the turning or spinning of a planet on its axis, whereas, revolution is a full orbit around another object.
100
How do the seasons differ between the Northern and Southern Hemisphere?
They are always opposite to each other.
100
What is the action called when the size of the lit part of the moon grows?
waxing
100
Which moon phases have a shape sometimes described as a sliver or banana?
Waxing and Waning Crescents
100
What does the word eclipse mean?
The obscuring or blocking of light from one celestial body due to another.
200
What is a satellite?
Any object, natural or man-made, that orbits around another object due to a gravitational attraction.
200
What does equinox mean?
When day and night are equal.
200
How much of the moon is always lit up
50%
200
What do the shaded in areas represent?
Where the sunlight is not being reflected.
200
How often does a lunar eclipse occur?
twice a year
300
What is the length of time for Earth's rotation and its revolution?
It rotates in 24 hours and revolves in 365 days(a year).
300
What does solstice mean?
These are the longest and shortest days of the year.
300
From which direction do we "read" the moon to determine its phase?
From right to left.
300
What causes the moon phases?
It is the relative positions of the Earth Sun and Moon along with how much light is being reflected off of which portion of the moon.
300
In which order would you illustrate a lunar eclipse?
Sun, Earth, and then the moon.
400
Approximately how long does it take to get through a complete lunar cycle?
28 days
400
Which season is occurring in the Northern Hemisphere at position D?
Winter
400
What is the highest percentage of the moon that you will ever see lit?
50%
400
Which side is illuminated for a 1st and 3rd quarter respectively?
Right side for the 1st and left side for the 3rd.
400
Which object is blocking sunlight during a lunar eclipse?
the Earth
500
Seasons and moon phases have something in common, that is the direction of the orbits involved-what is that direction?
Counterclockwise
500
Which season is occurring in the Southern Hemisphere at position C?
Spring
500
What is waning and how do we see it?
It is the darkening of the fully lit moon as we see the darkness growing from right to left on the face of the moon.
500
Name the two moon phases that are opposite to each other starting with position A.
New Moon and Full Moon
500
Which object is in a shadow during a solar eclipse?
the Earth
600
How often does a solar eclipse occur?
every 18 months
600
During which position would you expect the least direct light being received in our Northern Hemisphere?
Position D (Winter)
600
Out of the following, which would NOT be a way that we think of when dividing up the moon into parts? (1/2, 1/4, 1/8, or 1/16) And why?
1/16-because 1/2 would be the near side vs. far side, 1/4 would be the 1st and 3rd quarters, and 1/8 would be the crescents.
600
Name the moon phase just after position A.
Waxing Crescent
600
What would make an eclipse be only a partial solar eclipse?
When the moon comes between the sun and the Earth, but the moon on partially covers the Sun's disk.
700
What is the degree of tilt for Earth's axis?
23.5 degrees
700
What causes seasons to occur?
Earth's tilt on its axis as it revolves around the sun
700
Describe where you would find the crescents and the gibbous moons respectively?
Crescents on the left closer to the New Moon and Gibbous Moons on the right side closer to the Full Moon.
700
Name the moon phase just before position D.
Waning Gibbous
700
What is this image showing?
Solar Eclipse