PERT Exam: Questions With Solutions (Pass!)
Which element is critical to the formation of the volcanic surface of Io?
Right Ans - Sulfur
The simplest reflector telescope design is the prime focus reflector Right
Ans - True
What is thought to be the cause of Io's volcanoes? Right Ans - gravitational
tidal stresses from both Jupiter and Europa
Galileo is credited with designing the first reflector telescope Right Ans -
False
Which of the Galilean moons is densest and most geologically active? Right
Ans - Io
Chromatic aberration affects reflector telescopes Right Ans - False
Which are the four Galilean moons of Jupiter? Right Ans - Io, Europa,
Ganymede, and Callisto
All optical telescopes will bring the light from a star to a focus Right Ans -
True
The surface of Europa is most like the Earth's Right Ans - Arctic Ocean
A telescope design that uses a lens and no mirrors is a refractor Right Ans -
True
The weak magnetic fields around Europa and Ganymede were found during
flybys of Right Ans - Galileo
CCD detectors gather light 10-20 times faster than the most sensitive
photographic film. Right Ans - True
In size and density, both Io and Europa resemble Right Ans - our moon
A Newtonian reflector needs no secondary mirror Right Ans - False
,The mare on Ganymede were formed by Right Ans - water erupting and
spreading over the surface
The Hubble Space Telescope gives us its best resolution with X-rays Right
Ans - False
In terms of dark, smoother mare and cratered highlands, which Jovian moon
most resembles the
near side of our own? Right Ans - Ganymede
The Cassegrain reflector needs a primary concave main mirror and a smaller,
convex secondary mirror to reflect light back through a hole in the primary.
Right Ans - True
Of the Jovian satellites, which shows the oldest, most cratered surface?
Right Ans - Callisto
Photography with film is still the preferred way of capturing fine detail in the
faintest, most distant galaxies. Right Ans - False
The largest moon in the solar system, bigger but not as massive as Mercury, is
Right Ans - Ganymede
The light-gathering ability of a telescope is most dependent on the diameter of
its primary objective. Right Ans - True
A moon with a smooth, uncratered surface would imply Right Ans - the
surface is very young
Mt. Palomar's 200" Hale telescope is the largest reflector now in service.
Right Ans - True
Which of these moons has the densest atmosphere? Right Ans - Titan
A telescope with an 8-inch mirror will collect twice as much light as one with a
4-inch mirror. Right Ans - False
, Which of these moons are most interesting to exobiologists? Right Ans -
Europa and Titan
The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes
lens. Right Ans - True
At Titan, the lakes are made mostly of liquid Right Ans - Ethane
Radio telescopes have poorer angular resolution than optical telescopes
because radio waves have a much longer wavelength than optical waves.
Right Ans - True
Which of these gets so bright as to be seen in daylight at times? Right Ans -
Venus
All modern large optical telescopes are refractors. Right Ans - False
Which three worlds have almost identical densities? Right Ans - Mercury,
Venus, and Earth
Stars do not twinkle; the instability of the atmosphere causes this effect.
Right Ans - True
Which planet shows the widest range of surface temperatures between day
and night? Right Ans - Mercury
The opacity of the atmosphere is partially corrected via adaptive optics.
Right Ans - False
How does Mercury's rotation relate to the Sun? Right Ans - Its rotation rate
is 2/3 as long as its year, due to tidal resonances.
In the future, adaptive optics will greatly enhance the resolution of the Hubble
Space Telescope. Right Ans - False
Venus' rotation on its axis Right Ans - is clockwise, unlike most other solar
system objects.
Which element is critical to the formation of the volcanic surface of Io?
Right Ans - Sulfur
The simplest reflector telescope design is the prime focus reflector Right
Ans - True
What is thought to be the cause of Io's volcanoes? Right Ans - gravitational
tidal stresses from both Jupiter and Europa
Galileo is credited with designing the first reflector telescope Right Ans -
False
Which of the Galilean moons is densest and most geologically active? Right
Ans - Io
Chromatic aberration affects reflector telescopes Right Ans - False
Which are the four Galilean moons of Jupiter? Right Ans - Io, Europa,
Ganymede, and Callisto
All optical telescopes will bring the light from a star to a focus Right Ans -
True
The surface of Europa is most like the Earth's Right Ans - Arctic Ocean
A telescope design that uses a lens and no mirrors is a refractor Right Ans -
True
The weak magnetic fields around Europa and Ganymede were found during
flybys of Right Ans - Galileo
CCD detectors gather light 10-20 times faster than the most sensitive
photographic film. Right Ans - True
In size and density, both Io and Europa resemble Right Ans - our moon
A Newtonian reflector needs no secondary mirror Right Ans - False
,The mare on Ganymede were formed by Right Ans - water erupting and
spreading over the surface
The Hubble Space Telescope gives us its best resolution with X-rays Right
Ans - False
In terms of dark, smoother mare and cratered highlands, which Jovian moon
most resembles the
near side of our own? Right Ans - Ganymede
The Cassegrain reflector needs a primary concave main mirror and a smaller,
convex secondary mirror to reflect light back through a hole in the primary.
Right Ans - True
Of the Jovian satellites, which shows the oldest, most cratered surface?
Right Ans - Callisto
Photography with film is still the preferred way of capturing fine detail in the
faintest, most distant galaxies. Right Ans - False
The largest moon in the solar system, bigger but not as massive as Mercury, is
Right Ans - Ganymede
The light-gathering ability of a telescope is most dependent on the diameter of
its primary objective. Right Ans - True
A moon with a smooth, uncratered surface would imply Right Ans - the
surface is very young
Mt. Palomar's 200" Hale telescope is the largest reflector now in service.
Right Ans - True
Which of these moons has the densest atmosphere? Right Ans - Titan
A telescope with an 8-inch mirror will collect twice as much light as one with a
4-inch mirror. Right Ans - False
, Which of these moons are most interesting to exobiologists? Right Ans -
Europa and Titan
The 400" Keck reflector can see objects 100 times fainter than the 40" Yerkes
lens. Right Ans - True
At Titan, the lakes are made mostly of liquid Right Ans - Ethane
Radio telescopes have poorer angular resolution than optical telescopes
because radio waves have a much longer wavelength than optical waves.
Right Ans - True
Which of these gets so bright as to be seen in daylight at times? Right Ans -
Venus
All modern large optical telescopes are refractors. Right Ans - False
Which three worlds have almost identical densities? Right Ans - Mercury,
Venus, and Earth
Stars do not twinkle; the instability of the atmosphere causes this effect.
Right Ans - True
Which planet shows the widest range of surface temperatures between day
and night? Right Ans - Mercury
The opacity of the atmosphere is partially corrected via adaptive optics.
Right Ans - False
How does Mercury's rotation relate to the Sun? Right Ans - Its rotation rate
is 2/3 as long as its year, due to tidal resonances.
In the future, adaptive optics will greatly enhance the resolution of the Hubble
Space Telescope. Right Ans - False
Venus' rotation on its axis Right Ans - is clockwise, unlike most other solar
system objects.
