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Unit 4
Test Description: Stars and the big bang theory
Instructions: Answer all questions to get your test result.
1) The sun is approximately ______ years old and will die out when it is ______ years old
A
4.6 billion, 10 billion
B
2018, 5000
C
12 thousand; 50,000 thousand
D
5 million, 10 million
2) What is the force that drives gas and dust to come together to create the beginning of a star?
A
Gravity
B
Nuclear Fission
C
Nuclear Fusion
D
Meta Chlorine
3) What type of nuclear fusion is going on in the main sequence of a low mass star? (Hint: ____ into ____)
A
Lithium, Neon
B
Hydrogen, Helium
C
Helium, Boron
D
Gravity, energy
4) Which of the following describes the correct order of the development of matter in the early universe?
A
Protons and Neutrons-- Atoms-- Nuclei-- Quarks
B
Quarks-- Protons and Neutrons-- Nuclei-- Atoms
C
Atoms-- Nuclei-- Quarks-- Protons and Neutrons
D
none of the choices are true
5) Due to the way matter formed after the Big Bang, most stars in the universe are composed of approximately ______ and ______.
A
75% hydrogen; 25% helium
B
25% hydrogen; 75% oxygen
C
50% helium; 50% hydrogen
D
90% oxygen; 10% helium
6) The process of redshifting occurs when a star or galaxy is …..
A
moving toward Earth at a very fast pace.
B
maintaining a constant, very far distance from Earth.
C
moving away from Earth at a very fast pace.
D
red in color.
7) Nearly all of the energy we have on Earth actually originated in the Sun’s core
A
True
B
False
8) The doppler effect works on ________ waves
A
Sound and light
B
Light
C
Sound
D
Neither light nor sound
9) When light waves stretch to make galaxies moving away from us look more red than they actually are we call that _______.
A
The Big Bang
B
Doppler effect
C
Redshifting
D
Lightshifting
10) According to the doppler effect, when objects are becoming more distant, the wavelength _______.
A
Doesn’t matter
B
Stays the same
C
Increases
D
Decreases
11) The Sun is approximately _____ years old, and will likely die out when it is around _____ years old.
A
10 billion; 45 billion
B
1 million; 10 billion
C
4.6 billion; 10 billion
D
1 million; 4.5 million
12) Which type of EM radiation reaches the Earth from the Sun?
A
Only gamma rays
B
Only visible light and heat energy
C
Only radio waves
D
All waves in the electromagnetic spectrum
13) Which of the following will a LOW TO MEDIUM MASS star turn into at the end of its life?
A
Black hole
B
Red supergiant
C
Neutron star
D
White dwarf
14) Compared to other stars in the universe, our Sun would be considered a _____.
A
white dwarf star
B
high mass to supermassive star
C
neutron star
D
low to medium mass star
15) Our Sun is currently in the _____ stage of its life cycle.
A
nebula
B
red giant
C
planetary nebula
D
main sequence
16) What causes a star to expand during the Giant stage of its life cycle?
A
the force caused by nuclear fusion becomes greater than the force of gravity
B
the process of nuclear fusion completely stops working
C
the star's gravity ceases to exist
D
there is a balance between the inward force of gravity and the outward force of fusion
17) Where in a star does the process of nuclear fusion occur?
A
In its core
B
Inside the black hole
C
Outside its shell
D
Somewhere in the nebula
18) What is produced during the process of nuclear fusion?
A
Electromagnetic radiation
B
All of the above
C
Energy
D
Elements heavier than hydrogen
19) Which of the following correctly describes the process of nuclear fusion?
A
Two smaller atoms are fused together to form one heavier atom
B
An atomic nucleus randomly splits into two separate atoms with less mass
C
Helium is broken down into a smaller, less complex substance
D
Water molecules are squeezed together to form hydrogen gas
20) Most scientists think that elements heavier than iron are made ___.
A
by gravity
B
during a supernova explosion
C
inside neutron stars
D
while nuclear fission is occurring
*select an answer for all questions
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