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WorksheetsAstronomy - Stars
Total questions: 28
Worksheet time: 14mins
Name
Class
Date
1.
The longest wavelength EM waves are:
a)
ultraviolet waves
b)
radio waves
c)
visible light
d)
gamma rays
2.
When stars are fusing hydrogen into helium, and are neither expanding nor contracting, they are said to be...
a)
dying
b)
in hydrostatic equilibrium
c)
white dwarfs
d)
red hypergiants
3.
Which type of star has the longest life span?
a)
A star of 10 solar masses
b)
A star of 1 solar mass
c)
A star of 0.1 solar masses
d)
A star of 50 solar masses
4.
When most of the hydrogen in the core of the star has been fused into helium, the star...
a)
begins to expand, forming a red giant
b)
begins to contract, forming a white dwarf
c)
collapses in on itself, forming a black hole
d)
explodes in a supernova
5.
A star the size of the sun has a life span of...
a)
About 10 Billion Years
b)
About 10 Million Years
c)
About 10 Trillion Years
d)
About 100 Million Years
6.
________ are stars that are in the prime of life, fusing hydrogen to helium in their cores.
a)
Main sequence stars
b)
Red giants
c)
White dwarfs
d)
Neutron stars
7.
During a supernova, which of the following events occurs?
a)
The star of the supernova gets dimmer
b)
Only small elements (atomic number < 6) are generated
c)
Massive amounts of gamma rays and cosmic rays are released
d)
a white dwarf forms
8.
Which of the following is true about main sequence stars?
a)
Main sequence stars are all about the same size.
b)
Main sequence stars all have about the same luminosity
c)
Main sequence stars create energy the same way.
d)
Main sequence stars are all about the same color.
9.
Black holes are best described as:
a)
space fillers
b)
holes
c)
a place in space where gravity pulls so much even light can't get out
d)
gravity bombs
10.
If an object is moving toward us, its spectrum will experience
a)
no shift
b)
red shift
c)
black spectrum
d)
blue shift
11.
Why is the light from distant galaxies red-shifted?
a)
They produce more red light than nearby galaxies
b)
They are moving away from us
c)
The longer wavelengths are filtered out more by dust
d)
They are moving toward us
12.
About how long ago do scientists believe the universe began?
a)
13-14 billion years ago
b)
13-14 million years ago
c)
12-13 billion years ago
d)
12-13 million years ago
13.
The EM waves with the greatest energy
a)
ultraviolet waves
b)
radio waves
c)
visible light
d)
gamma rays
14.
We feel these waves as heat
a)
infrared waves
b)
gamma rays
c)
visible light
d)
microwaves
15.
These waves cause sunburn
a)
ultraviolet waves
b)
gamma rays
c)
visible light
d)
x-rays
16.
Which star is bright and cool?
a)
Vega
b)
Our Sun
c)
Betelgeuse
d)
Sirius B
17.
On an HR diagram where are the hottest stars?
a)
on the left
b)
on the right
c)
on the bottom
d)
on the top
18.
On an HR diagram where are the brightest stars?
a)
on the left
b)
on the right
c)
on the top
d)
on the bottom
19.
The apparent shift in position of an object when viewed from two different places is
a)
a light year
b)
apparent magnitude
c)
parallax
d)
absolute magnitude
20.
The HR diagram graphs stars'
a)
diameter and brightness
b)
distance and brightness
c)
brightness and temperature
d)
brightness and absolute magnitude
21.
A light year is a unit of
a)
time
b)
magnitude
c)
distance
d)
speed
22.
Parallax cannot be used on a star if it is too
a)
close
b)
bright
c)
far away
d)
large
23.
Classification of about 90% of all stars
a)
white dwarfs
b)
red giants
c)
supergiants
d)
main sequence
24.
A supernova is the explosion of a dying
a)
giant or supergiant star
b)
white dwarf star
c)
main sequence star
d)
nebula
25.
The lifetime of a star depends on its
a)
temperature
b)
mass
c)
brightness
d)
color
26.
Stars are classified by:
a)
size
b)
temperature and brightness
c)
mass
d)
distance from earth
27.
What can a scientist learn about a star from its spectrum?
a)
its color
b)
its size
c)
its composition and temperature
d)
its age
28.
How old is our Sun?
a)
1,000,000 years
b)
6019 years
c)
13.8 billion years
d)
4.5 billion years
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