29 terms

Seasons Valley 2019

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Equinox
Two times of year when the day and night lengths are about 12 hours. Equal day and night.
Vernal equinox
This occurs in March and marks the beginning of spring in North America. Also called spring equinox
Autumnal equinox
This occurs in September and marks the beginning of fall in North America. Also called fall equinox
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
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
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
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 ______.
The days are shorter and you receive indirect light from the sun causing cooler temperatures.
Why are winter temperatures lower (cold)?
Summer
The season experienced when the earth's axis is tilted TOWARD the sun
Winter
The season experienced when the earth's axis is tilted AWAY from the sun
Spring
What season is position 1 in the Northern Hemisphere?
Fall
What season is position 3 in the Northern Hemisphere?
axis
An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates
crescent
Moon phase in which less than half of the Moon appears to be illuminated.
full moon
moon phase when the entire side facing Earth is illuminated.
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.
revolve
To move in a eclipse around another body
rotate
to spin on an axis
tide
The periodic rise and fall of the level of water in the ocean
wane
To decrease gradually
wax
to become larger
Rotation
The spinning of an object on a fixed point; causes day and night
Tilt
Leaning toward or away from another object
Orbit
The path an object takes when revolving around another object
Hemisphere
A half of a sphere
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°.
Seasons
The result of Earth's axis and the yearly revolution of the Earth around the sun
23.5
The angle which the earth's axis is tilted
Spring and Fall
The seasons in which all locations on earth are receiving thaesame amount of daylight hours