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astro exam 1

Terms in this set (83)

a light year is about

the time it takes sunlight to travel from the Sun to Earth


10 trillion kilometers


365 days
10 trillion km
andromeda is
a nearby galaxy


a star


the name of an asteroid
a nearby galaxy
the diameter of the moon is about ______ that of earth

equal to


1/4


1/100
1/4
the local group is
a group of planets, including Earth


a cluster of galaxies, including the Milky Way


a family of asteroids
a cluster of galaxies, including milky way
there are about a million galaxies in the universe
false
alpha centauri is

the name of an asteroid


a nearby galaxy


a star
a star
which is not part of the definition of a planet
It orbits a star.

It is large enough for its own gravity to make it round.


It has moon(s).


It has cleared other significantly sized objects around its orbit.
it has moons
earths speed in its orbit about the sun is about

105 kilometers per hour


103 kilometers per hour


10−10 kilometers per second
10^5 km per hour
how long does light take to travel from the sun to the earth


0.5 seconds


5 seconds


50 seconds


500 seconds
500 seconds
which term refers to the direction directly above your head


ecliptic


meridian


zenith


azimuth
zenith
in tuscon (32 degree latitude) the sun will be at zenith

...every day at noon

...never.
never
if you live in quito which is located at the equator, you will observe the sun to be at zenith at noon


... twice per year, at the March and September equinoxes.


... every day.
twice per year, at march and september equinoxes
at equinox


...the Northern hemisphere receives more sunlight than the Southern hemisphere.


...the Southern hemisphere receives more sunlight than the Northern hemisphere.


... both hemispheres receive an equal amount of sunlight.
both hemispheres recieve an equal amount of sunlight
we can be sure that variations in earths distance from the sun are not the cause of the seasons because



... if distance were responsible for the seasons, both the Northern and Southern hemispheres would have summer at the same time.


... if distance were responsible for the seasons, seasonal temperature changes would be much more extreme.
if distance were responsible for the seasons, both the northern and southern hemispheres would hvae sumer at the same time
true or false
During Northern hemisphere winter, Sunlight strikes the ground at a steeper angle in the Southern hemisphere than it does in the Northern hemisphere.
true
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