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ASTR 1020 FINAL EXAM
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ASTR 1020 FINAL EXAM
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ASTR 1020 FINAL EXAMWhat is the fundamental metric unit for length? - ANSWER Meter
If you are given the equation "y=4x - 3", "-3" is the - ANSWER y-intercept
If you are given the equation "y=4x -3", what is the slope? - ANSWER 4
What is the y-axis called? - ANSWER vertical axis
Given the two points (2,0) and (7, -10), the rise is equal to - ANSWER -10
7.2 km is equal to ______. - ANSWER 7200 m
0.25 arc minutes= _______ arc seconds - ANSWER 15
Given the two points (2,0) and (7,-10), the run is equal to - ANSWER 5
90 degrees= ________radians (Note: the p stands for pie symbol) - ANSWER p/2
9 cm is equal to _______. - ANSWER 90mm
Where are sunspots located? - ANSWER photosphere
Which layer of the sun is visible to us only during a solar eclipse? - ANSWER
Chromosphere
When did Galileo first discovered sunspots? - ANSWER 1600
What direction does the sun travel? - ANSWER East to West
The solar cycle is every _____ years. - ANSWER 11
What is the surface of the sun that is visible to us - ANSWER Photosphere
Which of the following is not an inner layer of the sun? - ANSWER Corona
The sunspots are areas of the Sun's surface that are at ________ temperatures than
its surroundings. - ANSWER lower
Who is the first person to record sunspots and their motion? - ANSWER Galileo
Galilei
___ Type of stars have the lowest surface temperature. - ANSWER M
The star Antares is classified as a M1 I star. What does the M1 represent? -
ANSWER Spectral Type
, Which type of star has a surface temperature greater than 30,000? - ANSWER O
Type
Astronomers normally groups stars according to their surface temperature and each
group is known as _________. - ANSWER Spectral Type/Class
Which luminosity class is the least luminous? - ANSWER Main Sequence
Which luminosity class is a rare group of giant stars? - ANSWER Bright Giants
Which color represents the hottest star? - ANSWER Violet-Blue
From the luminosity class of a star, we can determine its ______ - ANSWER
luminosity
Each lettered spectral class is further categorized by subdividing into ___
subdivisions. - ANSWER 10
Which luminosity class does our Sun belong to? - ANSWER Main Sequence
The stages of the stellar life cycle that follow after the main sequence depend on the
______ of a star. - ANSWER mass
For about a _______ a supernova can emit at an energy rate equal to 10 Suns. -
ANSWER week
In Astronomy, _________ is not considered a heavy element. - ANSWER hydrogen
Which is not an end stage for a star? - ANSWER Green Dwarf
Most ____________ are detected as pulsars. - ANSWER neutron stars
In the Supergiant stage, the luminosity ________ even though the surface
temperature __________. - ANSWER increases, decreases
A ___________ is an object with a gravitational field so strong that even light cannot
escape it. - ANSWER black hole
A _______ is born from the collapse of an interstellar cloud. - ANSWER star
What is the final stage of our Sun? - ANSWER White Dwarf
In order to become a star, a protostar has to have a mass greater than about ______
Msun. - ANSWER 0.08
The ____________ diagram is a plot of the luminosity against temperature for a
group of stars. - ANSWER Hertzsprung-Russell (HR)
What is a plot of a star's evolution on a H-R diagram called? - ANSWER
evolutionary track
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