7.2.6 Stars and the Universe 2

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Question 1 of 13

1. Question
1 point(s)
What are the two primary elements in the Sun\’s composition?
- Hydrogen and oxygen
- Helium and carbon
- Hydrogen and helium
- Nitrogen and oxygen
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Question 2 of 13

2. Question
1 point(s)
The red-shift observed in light from remote galaxies supports which concepts? (You may select more than one answer)
- I. The Big Bang Theory
- II. The Universe\\\’s expansion
- III. The motion of distant galaxies both towards us and away from us
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Question 3 of 13

3. Question
1 point(s)
What sequence best describes the development stages of a star similar in mass to our Sun?
- Starts with interstellar hydrogen clouds, becomes a protostar, turns into a main sequence star, expands to a red supergiant, and ends as a black hole
- Begins with interstellar hydrogen clouds, transitions through a planetary nebula phase, matures into a main sequence star, swells to a red giant, reverts to a protostar, and finally cools as a white dwarf
- Commences with interstellar hydrogen clouds, forms a protostar, evolves into a main sequence star, grows into a red giant, sheds as a planetary nebula, and finishes as a white dwarf
- Starts with interstellar hydrogen clouds, develops into a protostar, advances to a main sequence star, enlarges to a red supergiant, and collapses into a neutron star
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Question 4 of 13

4. Question
1 point(s)
What is the significance of the value 2.2 × 10⁻¹⁸ s⁻¹?
- A measure of 1 light year
- A reference to Red-shift
- The Cosmic Microwave Background Radiation
- The Hubble constant
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Question 5 of 13

5. Question
1 point(s)
In which segment of the electromagnetic spectrum does the majority of the Sun\’s energy output occur?
- Radio, visible, and gamma
- Infrared, visible, and ultraviolet
- Infrared, X-rays, and gamma
- Infrared, visible, and gamma
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Question 6 of 13

6. Question
1 point(s)
How should redshift be properly explained?
- Galaxies far away only give off red spectrum light.
- Red spectrum light is the sole color that reaches Earth from extremely distant stars.
- The Milky Way\\\’s stars predominantly radiate red spectrum light.
- Light from remote galaxies is observed as shifted towards the red spectrum.
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Question 7 of 13

7. Question
1 point(s)
How long would it take for light to traverse from the core to the rim of the Milky Way?
- 500 light years
- 50,000 light years
- 100,000 years
- 100,000 light years
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Question 8 of 13

8. Question
1 point(s)
What is the distance that light travels within one year?
- 9.5 × 10¹⁵ km
- 9.5 × 10¹⁵ m
- 9.5 × 10¹⁵ s
- 9.5 × 10¹⁵ days
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Question 9 of 13

9. Question
1 point(s)
Considering the average orbital radius of Uranus is 4,500 million km, how much time does sunlight take to reach it?
- 4 minutes
- 1 hour
- 4 hours
- 4 days
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Question 10 of 13

10. Question
1 point(s)
When it comes to measuring galactic velocities and distances, which methods are used?
- Redshift for both
- Redshift for speeds and supernova brightness for distances
- Supernova brightness for speeds and redshift for distances
- Supernova brightness for both
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Question 11 of 13

11. Question
1 point(s)
What can be derived from the formula Hubble introduced, H₀ = v/d? (You can select more than one answer)
- I. The range to different galaxies
- II. The recession velocity of galaxies
- III. The estimated duration since the Big Bang
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Question 12 of 13

12. Question
1 point(s)
Given that the Andromeda galaxy is positioned 2.5 million light-years from our planet, how rapid is its movement away from Earth?
- 5200 m/s
- 52 km/s
- 5.2 km/s
- 520 km/s
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Question 13 of 13

13. Question
1 point(s)
Which formula is associated with determining the Universe’s age?

t = time taken for light to travel from a galaxy to Earth
H₀ = Hubble constant
v = speed of a galaxy moving away from Earth
d = distance between a galaxy from Earth
- t
- H₀
- v/d
- d/v
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