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57 Cards in this Set

  • Front
  • Back
what direction does earth rotate
counterclockwise, from west to east
at what rate does the earth rotate
15 degrees per hour
what happens to the rate of rotation as you increase in latitude
the rate of rotation decreases
..slower at the poles than the equator
what is terrestrial evidence for earth's rotation? (2 things)
a) pendulum appears to change direction
b) coriolis effect-winds or ocean currents are deflected to their right in the north hemisphere and to their left in the south hemisphere
what angle is earth tilted at?
23 1/2 degree angle
what do the stars appear to do in relation to polaris?
circle around polaris at the rate of 15 degrees per hour
where are the direct rays on june 21?
23 1/2 degees north
what angle of the sun does NY get on June 21?
71 degrees
where does the sun rise on june 21?
north of east
where does the sun set on june 21?
north of west
how many hours of daulight does NY get on june 21
15 hours
how much potential energy does the earth have on june 21
maximum
how much kinetic energy does the earth have on june 21?
minimum
how much gravity does the earth ahve on june 21?
minimum
what does the sun look like on june 21?
small
who gets 24 hours of daylight on june 21?
the north pole
what do the shadows look like in NY on june 21?
short
where on the direct rays of the sun on december 21?
23 1/2 degrees south
how many hours of daylight does NY get on december 21?
9 hours
what is the angle of teh sun rays in NY on dec. 21?
26 degrees
what do the shadows look like in NY on dec. 21?
long
who gets 0 hours od daylight on dec. 21?
north pole
how much gravity is there on dec. 21
max
how much greater is the fravity thanon june 21
4 times greater
how much kinetic energy on dec. 21?
max
how much potentail energy on dec. 21
min.
direct rays on sept./march 21
equator
hours of sunlight in NY on sept/march 21
12 hrs
angle of sun in NY sept.march 21
50
where does the sun rise on december 21
south of east
where does sun set on december 21?
south of west
what is the altitude of noon on december 21?
smallest angle (lowest in the sky)
where does the sun rise on june 21?
north of east
where does the sun set on june 21?
north of west
what is the alitude of the sun on june 21?
largest angle (highest in the sky)
where does the sun rise on march 21 and september 23?
due east
where does the sun set on march 21 and september 23?
due west
what is the altitude of the noon sun on sep. 21/march21?
about 45 degrees
what is evidence for earth's revolution?
parallax-seen in different constellations at different times of the year
Months that the sun rises NE and sets NW
April May June July August
Months Sun Rises due east and sets due west
march 21 sept. 21
when sun rises SE and sets SW
oct. mov. dec. jan. feb.
explain where direct rays are
june 21- 23 1/2 north
july---> august --between 23 1/2 north and 0
sept.-0
Oct. Nov. --> between 0 and 23 1/2 south
dec. 21--> 23 1/2 south
jan feb. --> between 23 1/2 south and 0
march- 0
april may-->between 0 and 23 1/2 north
geocentric model
said the earth does not rotate or revolve
said planets sun and stars revolved around the earth
was unable to explain the pendulum or retrograde motion of the planets
heliocentric model
sun is the center and the planets followed the circular orbits around the sun
keplers first law
1st law of orbits-heliocentric but the orbits are eccentric-MODERN MODEL
Keplers law of equal area
the earth will sarve out from sun areas that are the same in area in the same amount of days
parallelism
tilt of the earth remains constant
how many minutes later each day does the moon rise?
50 minutes
celestial objects
stars, moon, planets, etc.
what shape does the sun's apparent path from sunrise to sunset have?
arc
only between what two latitudes can the noon sun be directly overhead at an altitude of 90 degrees?
between 23 1/2 degrees north and 23 1/2 degrees south
where is the sun directly overhead on june 21?
23 1/2 degrees north
where is the sun directly over head on sep. 23 and march 21?
equator-o degrees
ere is the sun directly overhead on december 21?
23 1/2 degrees south
when is the line of the tilt of the earth perpendicular to?
its orbit of the sun
evidence of earths revolution (3)
1. different constellations for different seasons
2. apparent diamter of the sun
3. doppler effect of stars