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RCDS-Astronomy Fall 2020 Final Review Flashcards | StudBud
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RCDS-Astronomy Fall 2020 Final Review
RCDS-Astronomy Fall 2020 Final Review
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A review tool for High School Astronomy
Flashcards
33 cards
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Practice quiz
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Questions
33
Answers
1
Why are most large telescopes reflectors, not refractors?
Reflectors do not suffer from chromatic aberration
Large, clear lenses are harder to cast than mirrors
Large lenses deform under their own weight
All answers are correct
2
How much stronger is the grav. pull of the Sun on Earth, at 1 AU, than it is on Saturn at 10 AU
5X
25X
10X
100X
3
A wave's velocity is the product of the:
period times the energy of the wave.
frequency times the wavelength of the wave.
amplitude times the wavelength of the wave.
amplitude times the frequency of the wave.
4
Which of these is the classic continuous spectrum?
a rainbow
a glowing nebula, such as M-42
sunlight
a neon light
5
If you are in the Moon's umbral shadow, then you will witness:
nighttime
a partial solar eclipse
some kind of lunar eclipse
a total solar eclipse
6
The temp. scale that places zero at the point where all atomic and molecular motion ceases is
Celsius
Kelvin
Ransom
Fahrenheit
7
The classical model of the hydrogen atom that explains its spectral line structure is due to
Bohr
Kirchhoff
Fraunhofer
Mendeleev
8
The primary purpose of a telescope is to:
measure the brightness of stars very accurately
magnify distant objects
collect a large amount of light and bring it into focus
separate light into its component wavelengths
9
You note that a particular star is directly overhead. It will be directly overhead again in:
23 hours 56 minutes
1 hour
24 hours
24 hours 4 minutes
10
The process occurring when photons bounce off a polished surface is called
refraction
dispersion
diffraction
reflection
11
What is spectroscopy?
a method to freeze atm. turbulence for better resolution
an analysis of the way in which atoms absorb and emit light
study of the geometry of rainbows
an observational technique to measure the brightness
12
The three laws dealing with the creation of various spectra are due to
Newton
Bohr
Fraunhofer
Kirchhoff
13
What is the resolution of a telescope?
its ability to distinguish 2 objects close together
its ability to separate light into components for analysis
its ability to focus more than visible light for imaging
its ability to make distant objects appear much closer to us
14
Escape velocity is the speed required to
overcome the gravitational pull of an object
overtake an object in orbit and pass it
keep from falling out of orbit around an object
maintain a constant distance from an object
15
That Polaris will not always be the pole star is due to:
precession shifting the celestial pole.
the Solar winds blowing the Earth farther away from the Sun
the Earth's rev. is slightly less than exactly 365.25 days
the sidereal day being shorter than the solar day.
16
The planet's orbital period is
the time taken to return to the same place, wrt the Sun.
the time taken for it to retrograde back to same position
the time it takes for a satellite to orbit it
the time taken it to rotate & have the same face toward us
17
Which planet by itself contains the majority of mass of all the planets?
Uranus
Saturn
Jupiter
Saturn
18
An incandescent light (glowing tungsten filament) produces
an emission spec., with bright lines due to ionized tungsten
a cont. spec. with the peak giving the temp. of the filament
an absorption spec., with dark lines due to a solid filament
a continuum, with dark lines of tungsten and argon as well
19
What celestial line is a product of the Earth's orbit around the Sun?
Prime Meridian
Ecliptic
Galactic Plane
Analemma
20
According to the photoelectric effect to release electrons from a solid, the light must:
have a high intensity
have a low intensity
have a short wavelength
have a long wavelength
21
Seasons on Earth are primarily caused by
the tilt of the Earth's magnetic axis
the dates of the solstices and equinoxes
the tilt of the Earth's rotational axis
the precession of the Earth's rotational axis
22
The most important advantage of CCDs over film is that
their images never fade, as film can
they record much more light in a given exposure time
they can cover larger areas of the sky than film can
their images do not have to be developed as film does
23
In the atom, which particles give the element its identity (atomic number)?
positrons
neutrons
protons
neutrinos
24
Which of the choices below correctly lists things in order from largest to smallest?
Milky Way, Universe, Solar System, Local Group
Universe, Local Group, Milky Way, Solar System
Solar System, Local Group, Universe, Milky Way
Universe, Milky Way, Local Group, Solar System
25
If a light source is approaching at a speed very close to the speed of light, it will appear:
fainter than it is
redder than it is
bluer than it is
brighter than it is
26
About how many stars are visible on a clear, dark night with the naked eye alone?
a few dozen
a few hundred
tens of thousands
a few thousand
27
Which method of astronomical measurement is the precise measurement of brightness?
photography
astrometry
photometry
spectroscopy
28
On which of these assumptions do Ptolemy and Copernicus agree?
The Sun was bigger than the Earth
The Earth must be the center of all motion in the Cosmos
The Sun must orbit us, but the planets do orbit the Sun
All orbits must be perfect circles
29
Why are molecular lines more complex than elemental spectral lines?
Most of the universe is made of molecules, not single atoms
Molecules have two or more atoms
Molecules are the basis of life
Molecules can vibrate and rotate as well
30
Of all the forms of electromagnetic radiation, the one with the lowest frequency is:
visible light
radio waves
ultraviolet rays
microwaves
31
The visible color of electromagnetic radiation that has the shortest wavelength is
blue
red
violet
green
32
The principal culture that transferred Greek astronomical knowledge to Renaissance Europe was:
Chinese
Byzantine
Mayan
Islamic
33
Diffraction is the tendency of light to:
separate into its component colors
reflect off a mirror
spread around corners
disperse within a prism
