astro online test 1
saturn has about 100 times the mass earth and 10 times the radius. what is the surface gravity of Saturn compared to earth
1
how long would one need to observe a star on a 10-meter- telescope to collect the same amount of light as one collects in one hour on a 5 meter telescope
15 minutes
A planet in orbit around the Sun has an orbital period of 7 years. What is the semi-major axis of its orbit? Use p^2=a^3
3.6AU
There is a total of 88 constellations. Roughly how many of these can be seen at any given time from a single location on a clear night?
44
what time is it for the little green figure on earth
6 am
what time is the waning crescent moon directly overheard
9 am
Which of the following is a truthful description of the physical appearance of a comet
Comets develop a tail only when they get closer to the Sun in their orbit
In the figure above, how should the semi-major axis, a, and period, P, be adjusted in order that the white curve matches the observed plot of the distance of Callisto from Jupiter versus time (the blue dashed curves)?
Increase a and increase p
Why is Uranus blue?
It has methane in its atmosphere, which absorbs red light and makes the planet appear blue- green
What distinguishes a dwarf planet like Pluto from a regular planet?
It has not cleared the neighborhood around its orbit
The longest day of the years in the Northern Hemisphere is on or about __________ and the shortest is, again, six months later near __________ when the Earth is at opposite points in its orbit around the sun
June 21 and December 21
Which feature of Neptune is most responsible for its blue color?
Methane in its atmosphere
keplers first law
Planets revolve around the sun in elliptical orbits with Sun at one focuses of the ellipse
which of the following is true
Pluto has 5 moons, the largest of which is over half the diameter of Pluto
Of these choices, which planet has the most moons?
Saturn
What caused the extinction of the dinosaurs
The dust and smoke thrown up from an asteroid impact
Besides, the discovery that moons orbit Jupiter, what other discovery made by Galileo Galilei, with an early telescope, proved that the earth is not at the center of the Universe
The phases of Venus
How did the seas on the Moon form?
They are craters filled with lava 1-4 billion years ago
What would happen if the ozone layer were completely destroyed?
Ultraviolet radiation from the Sun would get through the atmosphere and cause damage to life
Which of the following is moving fastest in the orbit?
Venus at its perihelion (closest point to sun)
the surface of Venus is hotter than the surface of mercury because
Venus is more massive and is able to retain a thick atmosphere
which kind of telescope makes the most sense to build
a combination x-ray and gamma ray telescope in space
which would have the shortest day and the longest year
a planet that rotates rapidly on its axis and orbits slowly around the sun
In the figure above, what type of line will be produced in the spectrum and what type of particle is moving along the white arrow from a lower to a higher energy level?
absorption line, electron
how often is the sun in front of zodiac constellation
always
stars that are the same in constellation
are likely to be at very different distances from us
Where on the Venn diagram does the clue "Tail always points away from the sun" belong
c
which letter on the Venn diagram above represents the proper location for the clue "always are within our solar system"
c
the spectrum of an oxygen lamp look different than the spectrum of a sodium lamp because
each atom has a unique set of electron orbits
what makes a transition from a lower energy state to a higher energy state when a photon is absorbed into an atom
electron
approximately two weeks after a solar eclipse, what phase will the moon be in?
full
which object is shown in this image
ganymede
Two planets have the same radius. If Planet A is 5 times more massive than Planet B, how does gravity differ on the surfaces of the two planets?
gravity is 5 times stronger on planet A
what is the relationship between wavelength and frequency
if the frequency increases the wavelength decreases
what chemical compound that permeates the surface of mars given the martian soil its distinctive color
iron oxide
a mountain top is a good location for optical telescopes because the site
is above much of the atmosphere
density is
mass/volume
could astronauts survive on the surface of the titan without a space suit; maybe just an oxygen mask or something?
no, it is far too cold
Venus is visible to us
only near sunrise or sunset
the energy and frequency increase, while wave lengths decrease as you move from
radio wave, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays
at what time will the moon set on the day of solar eclipse
sunset
Star A is 4000K, and Star B is 8000K, which of the following is true?
the color of star a is redder than star b
the planets in our solar system are thought to have come from
the same cloud of gas and dust in which the sun formed
compare frequency of x-ray versus regular visible light
the x-ray has a higher frequency than visible light
could there be a place where it would never be a day on mercury
there could be a crater that is always in shadow since there is water ice that survives
two weeks after the first quarter moon it is the
third quarter moon
the rotation axis of earth is
titled at about 23 degrees relative to the earths orbits around the sun
Which object is in this image?
uranus
of the following types of radiation which has the high frequency
x-rays
the surface gravity on Mars is 40 percent of the surface gravity on Earth. This means...
you can jump higher on Mars than on Earth
