Download ASTRO 2023 Unit 1 Test: Questions and Answers and more Exams Astronomy in PDF only on Docsity!
May 31 at 11:59pm
after May 29 at 7:45am 150 Minutes
119 minutes
Unit 1 Test ASTRO 2023
Due Points 100 Questions 50
Available Time Limit
Instructions
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Allow one hour to complete all of the questions once you begin.
Attempt History
Attempt Time Score
! Correct answers will be available on Jun 1 at 8pm.
LATEST Attempt^1 94 out of 100
May 31 at 12:09pm
119 minutes.
Score for this quiz: 94 out of 100
Submitted
This attempt took
Question 1 2 /^2 pts
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 B gravity is 5 times stronger on Planet A gravity is 25 times stronger on Planet A gravity is 25 times stronger on Planet B gravity is equal on Planet A and Planet B Question 2 2 /^2 pts
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 longer days and nights than those of Earth have very severe seasons compared to Earth have shorter years than those of Earth have shorter days and nights than those of Earth
Ursa Minor is not a Zodiac constellation. The Zodiac constellations are located near the axis below the South pole. Ursa Minor is a Zodiac constellation all year. Question 5 2 /^2 pts
As compared to a cool star, a hotter star emits:
shorter wavelength, lower frequency, bluer color shorter wavelength, higher frequency, bluer color longer wavelength, higher frequency, bluer color shorter wavelength, higher frequency, redder color shorter wavelength, lower frequency, redder color Question 6 2 /^2 pts
A star is a hot, dense gas surrounded by a cooler, low density
atmosphere. What type of spectrum will a star create?
blackbody spectrum
absorption spectrum continuous spectrum hydrogen spectrum emission spectrum Question 7 2 /^2 pts
Bright lines in an emission spectrum represent:
particular energies of light that are emitted from a distant object photons absorbed when an electron jumps from a higher to a lower energy flaws in the telescopes and spectroscopes that astronomers use to measure spectra regions from which light travels more rapidly and reaches us more quickly photons absorbed when an electron jumps from a lower to a higher energy level
Question 10 2 /^2 pts
The Earth is approximately 6400 km in radius. If you were in orbit in the
Space Shuttle 150 km above the Earth, the force of gravity you feel
from the Earth would be:
slightly weaker than when you are standing on Earth slightly stronger than when you are standing on Earth equal to what you feel when standing on Earth equal to what you feel when standing on the Moon zero Question 11 2 /^2 pts
The force of gravity by the Sun keeps the planets in orbit around it, but
how do the planets affect the Sun?
They do not affect the Sun at all, it remains at rest. They exert an equally strong pull on the Sun, causing it to move slightly. The Sun responds by following a straight line path at constant speed.
They exert a stronger pull on the Sun, causing it to make a large, circular orbit. They cause it to rotate faster than it would if it were not orbited by planets. Question 12 2 /^2 pts
The longest day of the year 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.
September 21 and March 21 December 21 and June 21 June 21 and December 21 March 21 and September 21 August 21 and February 21 Question 13 2 /^2 pts
Consider a planet whose rotation axis is NOT tilted with respect to its
orbital plane. What are the seasons like on this planet?
longer than those on Earth.
Once every orbit of its moon (its month). Once every orbit of the planet around its Sun (its year). Twice every rotation of the planet (twice a day). Twice every orbit of its moon (twice a month). Question 16 2 /^2 pts
From Earth, in which constellation might you find the planet Saturn?
Canis Major Ursa Minor Lyra Draco Taurus Question 17 2 /^2 pts
Constellations close to the North pole of Earth
move in a circle around the North star, Polaris, over the course of a night
move in a circle around the North star, Polaris, over the course of a year are only visible from the Southern hemisphere in the Summer are only visible from the Southern hemisphere in the Winter are always visible from the Southern hemisphere Question 18 2 /^2 pts
What is the relationship between wavelength and frequency?
If the frequency increases the wavelength decreases. They are not related in any way. It depends on the amplitude of the light. If the wavelength increases the frequency increases. The frequency of light is always zero. IInnccoorrrreecctt (^) Question 19 0 /^2 pts
Which types of radiation have the lowest energy?
X-rays and gamma rays
a few a few hundred a few thousand a few million Question 22 2 /^2 pts
A star has a surface temperature of 50,000K. In which region of the
electromagnetic spectrum does its peak brightness occur?
radio waves microwaves infrared visible ultraviolet Question 23 2 /^2 pts
The spectrum of an oxygen lamp looks different than the spectrum of a
sodium lamp because:
different atoms are different colors
each atom has a unique set of proton orbits each atom has a unique set of electron orbits each atom has a unique set of neutron orbits oxygen photons have more mass than sodium photons Question 24 2 /^2 pts
Which of the following is true?
More than one element can have the same emission or absorption spectrum. The wavelengths of the emission lines produced by an element are different from the wavelengths of the absorption lines produced by the same element. An absorption spectrum appears as a continuous spectrum interrupted by a series of dark lines. An electron can have any energy within an atom, so long as that energy is above the ground state energy.
They can observe objects continuously for longer than humans can. All of the above. Question 27 2 /^2 pts
A telescope uses to focus light.
refracting/mirrors refracting/lenses reflecting/mirrors reflecting/lenses both B and C Question 28 2 /^2 pts
Two planets have the same mass, but Planet B has a radius 3 times
that of Planet A. How do their surface gravities compare?
Planet B has a surface gravity 1/9 that of Planet A Planet B has a surface gravity 9 times that of Planet A Planet B has a surface gravity 3 times that of Planet A
Planet B has a surface gravity 1/3 that of Planet A Planets A and B have the same surface gravity. Question 29 2 /^2 pts
The surface gravity on Jupiter is about three times as much as the
surface gravity on Earth. This means
You cannot jump as high on Jupiter as on Earth. You can jump higher on Jupiter than you can on Earth. Jupiter must be less massive than the Earth. Jupiter must be smaller than the Earth. Jupiter is closer to the Sun than the Earth is. Question 30 2 /^2 pts
Which of the following Solar System objects has the weakest surface
gravity?
Earth Mars the Moon
June 21 in both hemispheres Question 33 2 /^2 pts
Which would have the shortest day and the longest year?
A planet that rotates rapidly on its axis and orbits slowly around the Sun. A planet that rotates slowly on its axis and orbits rapidly around the Sun. A planet that rotates rapidly on its axis and orbits rapidly around the Sun. A planet that rotates slowly on its axis and orbits slowly around the Sun. The rotation speed of a planet and its orbital speed around the Sun have nothing to do with the length of its days or years. Question 34 2 /^2 pts
Two weeks after the First Quarter Moon it is the
Third Quarter Moon New Moon Waxing Gibbous Moon Full Moon Waning Gibbous Moon Question 35 2 /^2 pts
When does the New Moon set?
sunrise sunset midnight noon never Question 36 2 /^2 pts
What passes in front of the Sun during a Solar eclipse viewed from
Earth?
