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earth science
planet earth
20
Science
9th Grade
11/04/2008

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Term
horizon
Definition
place where Earth meets the sky
Term
zenith
Definition
the point in the sky directly above the observer
Term
polaris
Definition
the bright starn in the sky near the North Pole
Term
oblate spheroid
Definition
a wide, object that is spherical, but not completely round
Term
lattitude
Definition
-east-west lines parrallel to the equator used to measure distance in degrees
-north and south, from 0 degrees at the equator to 90 degrees north and south at the poles
Term
longitude
Definition
north-south lines running between the poles, used to measure distance in degrees east and west of the prime meridian, from 0 degrees at the prime meridian to 180 degrees east and west
Term
GMT
Definition
Greenwich Mean Time
Term
Rotate
Definition
to spin around on its own axis
Term
Period of Rotation
Definition
how long it takes for an object to rotate fully
Term
Foucault Pendulum
Definition
a heavy free-swinging pendulum suspended by a long, thin wire, whos plane of motion appears to change as Earth rotates
Term
Coriolis effect
Definition
the effect of Earth's rotaion that causes the deflection of moving objects toward the right in the northern hemisphere and toward the left in the southern hemisphere
Term
delfection
Definition
to change course because of hitting something
Term
revolve
Definition
to move around the focus point or another object
Term
period of revolution
Definition
the amount of time it takes for one body to move(revolve) fully around another object or body
Term
geocentric
Definition
when the Earth is in the middle of the system
Term
heliocentric
Definition
when the sun is in the middle of the system
Term
day
Definition
how long it takes to rotate
Term
year
Definition
how long it takes to revolve
Term
cyclic
Definition
when the data or object increase and decreases in a pattern
Term
insolation
Definition
the solar radiation(energy from the sun) reaches Earth
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