What is the motion of the earth as it spins called?
Rotation
100
How much time elapses from 10:00am to 2:00pm?
4 hours
100
How long does it take the earth to make one rotation?
One day - 24 hours
100
What is solar angle?
The angle at which light strikes a surface
200
What is the name for the motion of the earth as it circles the sun?
Revolution
200
What is the name of the star positioned directly over Earth's North Pole?
The North Star
200
How much time elapses from 8:15am to 2:18pm?
6 hours and 3 minutes
200
How long does it take the earth to travel around the sun?
One year - 365 days
200
What is beam spreading?
The way a light beam covers a larger area when it hits a surface at an angle
300
What is the shortest day of the year called?
The winter solstice
300
What is the longest day of the year called?
The summer solstice
300
How much time elapses from 6:44am to 9:56pm?
15 hours and 12 minutes
300
What part of the earth is always pointed toward the same place and where does it point?
The North Pole always points toward the North Star
300
What is energy density?
The number of rays hitting a given area
400
What is the time when Earth does not tilt toward or away from the sun?
Equinox
400
What two times of year is there (about) an equal amount of daylight and night?
Spring and fall equinox
400
How much time elapses from 7:30am to 6:22pm?
10 hours and 52 minutes
400
At what angle is the earth tilted?
23.5 degrees
400
From what angle is the density of energy greatest?
90 degrees - straight on
500
What is it called when the earth and sun are closest to one another?
Perihelion
500
What is it called when the earth and the sun are farthest from one another?
Aphelion
500
How much time elapses from 8:58am to 6:12pm?
9 hours and 14 minutes
500
The path of the earth around the sun can be described as what shape?
Oval
500
How does solar angle affect seasons?
When the solar angle is large, there is more energy per unit area on Earth's surface (more heat). When the solar angle is low there is beam spreading, which delivers less radiant energy (less heat)