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Glossary of earth science ch 25

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The height of an object in the sky ---above the HORIZON is called...
altitude
September 23 the first day of fall in the Northern Hemisphere
Dayight and nightime are equal in length
Autumn Equinox
An Imaginary straight line ---- (through the earth)

between the North and South pole----
Axis of rotation
The effect of the earth’s rotation

that causes the DEFLECTION of moving objects ----
toward or away from the equator
Coriolis effecf
The turning of an object on it’s axis
Rotation
the highest position of the sun as it moves on the arc from east to west
Solar noon
Time told by the sun
Solar time
Th first day of spring about
March 21st
Spring Eqinox
this is when you advance the standard time of day by one hour for more than six months a year
Daylight savings time
Imaginary line throughthe Pacific ocean where the date changes
International dateline
the apparent shift in an object's position caused by the motion of the observer
Parallax
this is how the earth's axis behaves during its revolution
Parallelism of axis
sometimes called the zone meridian, this is the meridian from which we measure longitude
The prime Meridian
The movement of the earth in its orbit around the sun
Revolution
an area where time is based on an average solar time at a particular meridian over a belt of 15 degrees longitude
A standard time zone
In the Northern Hemisphere this is the longest day of the year
Summer soltice
This is the place where each time zone is centered on a line of longitude which can be divided evenly by 15 degrees
Time Meridian
Around December 21st it is the first day of winter
Winter solstice
this is the point in the sky that is directly above the observer
Zenith

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