Two times of year when the day and night lengths are about 12 hours. Equal day and night.
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Vernal equinox
This occurs in March and marks the beginning of spring in North America. Also called spring equinox
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Autumnal equinox
This occurs in September and marks the beginning of fall in North America. Also called fall equinox
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Solstice
Two times of year when the day or night lengths are at their longest or shortest. The Earth is either tilted towards or away from the sun at 23.5 degrees
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Winter Solstice
This occurs in December and marks the beginning of winter in the Northern Hemisphere. This is also the shortest day of the year in the NH
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Summer Solstice
This occurs in June and marks the beginning of summer in the Northern Hemisphere. This is also the longest day of the year in the NH
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Leap Year
Because the year has 365 1/4 days a year we add on day to the calendar every four years we call this ______.
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The days are shorter and you receive indirect light from the sun causing cooler temperatures.
Why are winter temperatures lower (cold)?
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Summer
The season experienced when the earth's axis is tilted TOWARD the sun
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Winter
The season experienced when the earth's axis is tilted AWAY from the sun
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Spring
What season is position 1 in the Northern Hemisphere?
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Fall
What season is position 3 in the Northern Hemisphere?
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axis
An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates
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crescent
Moon phase in which less than half of the Moon appears to be illuminated.
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full moon
moon phase when the entire side facing Earth is illuminated.
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new moon
Moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth.
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revolve
To move in a eclipse around another body
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rotate
to spin on an axis
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tide
The periodic rise and fall of the level of water in the ocean
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wane
To decrease gradually
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wax
to become larger
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Rotation
The spinning of an object on a fixed point; causes day and night
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Tilt
Leaning toward or away from another object
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Orbit
The path an object takes when revolving around another object
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Hemisphere
A half of a sphere
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Equator
an imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.
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Seasons
The result of Earth's axis and the yearly revolution of the Earth around the sun
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23.5
The angle which the earth's axis is tilted
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Spring and Fall
The seasons in which all locations on earth are receiving thaesame amount of daylight hours
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moon phases
The changing appearances of the Moon as seen from Earth
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new moon
Moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth.
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first quarter moon
The moon is a quarter of the way around the Earth. You can see the right half of the moon.
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full moon
the phase of the moon in which we see the entire moon lighted, and it appears bright and round
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third quarter moon
The phase of the moon when it is three-quarters of the way through its orbit, and we see half of the moon lighted
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crescent moon
the phase of the moon in which only a curved edge of the moon's side that faced earth is illuminated, lasts about 6 days, can be a small sliver or almost a quarter moon.
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gibbous moon
when the size of the illuminated portion of the moon is greater than half but not a full moon, lasts about 6 days can be almost all white or just a little more than 1/2 white
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waxing moon
When the Moon appears to get bigger
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waning moon
When the Moon appears to get smaller
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New Moon
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Waxing Crescent
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First Quarter
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Waxing Gibbous
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Full Moon
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Waning Gibbous
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Third Quarter
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Waning Crescent
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Lunar Eclipse
Lunar or Solar Eclipse?
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Solar Eclipse
Lunar or Solar Eclipse?
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29.5 days
How long does it take for the moon to complete a set of phases?
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Orbit
The path that an object follows as it travels around another object in space.
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rotate
to turn around and around
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revolve
to keep turning in a circle or orbit around a central point or object.
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axis
an imaginary line through the middle of an object, around which the object spins.
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