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