WorksheetsStars and Light
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
When you divide the incoming light from an object into individual colors or wavelengths it's called ___
a)
a time-series graph
b)
a spectrum
c)
a Fourier transform
d)
a histogram
2.
Hot objects, that emit light at all wavelengths, are said to give off ___
a)
a fractured spectrum
b)
an extended spectrum
c)
a single line spectrum
d)
a continuous spectrum
3.
The continuous spectrum of a star has gaps in it, darker bands where different elements ___
a)
absorb different colors
b)
reflect different colors
c)
transmit different colors
d)
refract different colors
4.
In 1901, who developed a system to classify stars using many different absorption lines in their spectra?
a)
Marie Skłodowska Curie
b)
Rosalind Franklin
c)
Annie Jump Cannon
d)
Lise Meitner
5.
Which physicist showed how objects emit light of different colors based on their temperature?
a)
Albert Einstein
b)
James Clerk Maxwell
c)
Niels Bohr
d)
Max Planck
6.
Hotter stars put out more light at the blue end of the spectrum, while cooler ones peak ___
a)
in the red
b)
in the yellow
c)
in the green
d)
in the violet
7.
Cecelia Payne-Gaposchkin showed that the spectra of stars depended on their ___
a)
density and elements in their atmospheres
b)
temperature and elements in their atmospheres
c)
temperature and molecules in their atmospheres
d)
age and molecules in their atmospheres
8.
Payne-Goposchkin showed that stars were overwhelmingly composed of ___
a)
hydrogen
b)
helium
c)
carbon
d)
oxygen
9.
The classification scheme used today arranges stars by ___
a)
their size, assigning each a number
b)
their size, assigning each a letter
c)
their temperature, assigning each a number
d)
their temperature, assigning each a letter
10.
The letters 'O', 'B', 'A', 'F', 'G', 'K' and 'M' arrange stars in order from ___
a)
hottest to coolest
b)
coolest to hottest
c)
largest to smallest
d)
smallest to largest
11.
Which star, classified as an A0, is the brightest star in the night sky?
a)
Betelgeuse
b)
Sirius
c)
Vega
d)
Rigel
12.
A star can actually emit more green light than any other color but we'll wind up seeing it as ___
a)
white
b)
red
c)
blue
d)
violet
13.
If you look at the Sun's spectrum, it actually peaks ___
a)
in the red
b)
in the blue
c)
in the green
d)
in the yellow
14.
The light from the Sun is white but some of the shorter wavelengths get scattered away by ___
a)
atoms of oxygen in the air
b)
atoms of argon in the air
c)
molecules of nitrogen in the air
d)
molecules of oxygen in the air
15.
The total amount of energy emitted by a star is called its ___
a)
incandescence
b)
luminosity
c)
spectral integrity
d)
apparent brightness
16.
The luminosity of a star depends on ___
a)
its size and temperature
b)
its age and density
c)
its size and distance from us
d)
its age and distance from us
17.
A plot of a stars luminosity vs it's temperature is called ___
a)
an HR diagram, after Hertzsprung and Russell
b)
an HC diagram, after Hertzsprung and Cannon
c)
an CR diagram, after Cannon and Russell
d)
an HS diagram, after Hertzsprung and Saha
18.
The thick line, running diagonally down an HR diagram is called ___
a)
the general trend
b)
the main sequence
c)
the main trend
d)
the general sequence
19.
Comparatively, as shown on an HR diagram, massive stars are ___
a)
hotter and more luminous
b)
cooler and more luminous
c)
hotter and less luminous
d)
cooler and less luminous
20.
The stars on the lower left of an HR diagram are hot, blue/white but very faint, and are called ___
a)
white giants
b)
blue giants
c)
white dwarfs
d)
blue dwarfs
21.
Most stars live the majority of their lives ___
a)
as white dwarfs
b)
along the main sequence
c)
as red giants
d)
as red super giants
100 %
