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PSU Astro 7N Exam 1 - Questions with Explanations of Answers
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PSU Astro 7N Exam 1 - Questions with Explanations of Answers
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PSU Astro 7N Exam 1A ______ telescope uses ______ to focus light. - - refracting: lenses
- reflecting: mirrors
A comet's nucleus is composed of: - dust, dry ice, and water ice
A meteor shower can occur when - Earth's orbit crosses a trail of debris left behind
from a comet
A moon orbits a planet in exactly the same plane as the planet orbits its star. How
often does this planet experience a solar eclipse? - Once every orbit of its moon (its
month)
A moon orbits a planet in exactly the same plane as the planet orbits its star. How
often does this planet experience a solar eclipse? - Once every orbit of its moon (its
month)
A mountain top is a good location for optical telescopes because the site ... - Is
above much of the atmosphere
A new planet orbits its star faster than the Earth orbits the Sun and it rotates more
slowly than the Earth rotates. Which of the following is true? - The new planet has a
shorter year than Earth and a longer day than earth
A particular Zodiac constellation is high in the sky at midnight in April. Where will it
be in October? - Near the Sun in the daytime sky
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to
its orbital plane around its star would - Have seasons that are not very different from
each other as compared to earth
A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to
its orbital plane around its star would ... - Have seasons that are not very different
from each other as compared to Earth
A planet is in orbit around the Sun. The semimajor axis of the orbit is 5 Astronomical
Units (AU). Use P^2 = a^3 to calculate the period of the orbit, in years. - 11.2 years
A reflecting telescope collects light - in proportion to the area of its mirror
A star has a surface temperature of 50,000K. In which region of the electromagnetic
spectrum does its peak brightness occur? - ultraviolet
, A star is a hot, dense gas surrounded by a cooler, low density atmosphere. What
type of spectrum will a star create? - Absorption Spectrum
According to Newton's second law of motion, if the net force acting on the object
increases while the mass of the object remains constant, what happens to the
acceleration? - acceleration increases
According to Newton's Second Law of Motion, if the next force acting on the object
increases while the mass of the object remains constant, what happens to the
acceleration? - acceleration increases
All forms of radiation travel at the speed of light - true
An emission line is produced when: - An electron passes from a higher to a lower
energy level
Approximately two weeks after a Solar Eclipse, what phase will the Moon be in? -
Full
As compared to a cool star, a hotter star emits ... - Shorter wavelength, higher
frequency, bluer color
At approximately what time does the third quarter Moon rise? - midnight
At what time will the Moon set on the day of a Solar eclipse? - Sunset
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
Bright lines in an emission spectrum represent: - particular energies of light that are
emitted from a distant object
Bright lines in an emission spectrum represent: - particular energies of light that are
emitted from a distant object
Compare the frequency and wavelength of a gamma ray with that of visible light: -
gamma ray frequency is higher and its wavelength is lower
Compared to ultraviolet radiation, X-rays have a wavelength that is ... - Shorter
Compared to ultraviolet radiation, X-rays have a wavelength that is: - shorter
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