Unit 4 Question Preview (ID: 40900)
Stars And The Big Bang Theory.
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Which of the following correctly describes the process of nuclear fusion?
a) Two smaller atoms are fused together to form one heavier atom
b) Water molecules are squeezed together to form hydrogen gas
c) Helium is broken down into a smaller, less complex substance
d) An atomic nucleus randomly splits into two separate atoms with less mass
What is produced during the process of nuclear fusion?
a) Energy
b) Electromagnetic radiation
c) Elements heavier than hydrogen
d) All of the above
Where in a star does the process of nuclear fusion occur?
a) Outside its shell
b) Somewhere in the nebula
c) In its core
d) Inside the black hole
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 star's gravity ceases to exist
c) the process of nuclear fusion completely stops working
d) there is a balance between the inward force of gravity and the outward force of fusion
Our Sun is currently in the _____ stage of its life cycle.
a) nebula
b) main sequence
c) red giant
d) planetary nebula
Compared to other stars in the universe, our Sun would be considered a _____.
a) low to medium mass star
b) high mass to supermassive star
c) neutron star
d) white dwarf star
Which of the following will a LOW TO MEDIUM MASS star turn into at the end of its life?
a) Neutron star
b) Black hole
c) Red supergiant
d) White dwarf
Which type of EM radiation reaches the Earth from the Sun?
a) Only visible light and heat energy
b) Only gamma rays
c) Only radio waves
d) All waves in the electromagnetic spectrum
The Sun is approximately _____ years old, and will likely die out when it is around _____ years old.
a) 1 million; 4.5 million
b) 4.6 billion; 10 billion
c) 10 billion; 45 billion
d) 1 million; 10 billion
According to the doppler effect, when objects are becoming more distant, the wavelength _______.
a) Decreases
b) Increases
c) Stays the same
d) Doesn’t matter
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) The Big Bang
c) Lightshifting
d) Redshifting
The doppler effect works on ________ waves
a) Sound
b) Light
c) Sound and light
d) Neither light nor sound
Nearly all of the energy we have on Earth actually originated in the Sun’s core
a) True
b) False
c)
d)
The process of redshifting occurs when a star or galaxy is …..
a) moving away from Earth at a very fast pace.
b) maintaining a constant, very far distance from Earth.
c) moving toward Earth at a very fast pace.
d) red in color.
Due to the way matter formed after the Big Bang, most stars in the universe are composed of approximately ______ and ______.
a) 90% oxygen; 10% helium
b) 50% helium; 50% hydrogen
c) 75% hydrogen; 25% helium
d) 25% hydrogen; 75% oxygen
Which of the following describes the correct order of the development of matter in the early universe?
a) Quarks-- Protons and Neutrons-- Nuclei-- Atoms
b) Atoms-- Nuclei-- Quarks-- Protons and Neutrons
c) Protons and Neutrons-- Atoms-- Nuclei-- Quarks
d) none of the choices are true
What type of nuclear fusion is going on in the main sequence of a low mass star? (Hint: ____ into ____)
a) Gravity, energy
b) Helium, Boron
c) Hydrogen, Helium
d) Lithium, Neon
What is the force that drives gas and dust to come together to create the beginning of a star?
a) Nuclear Fusion
b) Nuclear Fission
c) Gravity
d) Meta Chlorine
The sun is approximately ______ years old and will die out when it is ______ years old
a) 5 million, 10 million
b) 4.6 billion, 10 billion
c) 12 thousand; 50,000 thousand
d) 2018, 5000
Most scientists think that elements heavier than iron are made ___.
a) by gravity
b) while nuclear fission is occurring
c) during a supernova explosion
d) inside neutron stars
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