Astro1 UCSB Final Exam 200 QUESTIONS AND WELL ELABORATED ANSWERS
2025 GRADED A {2VERSIONS}
What does Hubble's law describe the relationship between? -
CORRECT ANSWER distances and speeds of galaxies
Why is Hubble's law considered the first law to the Big Bang? -
CORRECT ANSWER it shows galaxies move away from each other
What type of data is Hubble Law based on? - CORRECT ANSWER the
recessional velocities of galxies vs speeds and distances
What are the two main types of shifts mentioned in relation to the
Doppler Effect? - CORRECT ANSWER (1) receding redshift (2)
approaching blueshift
What property of galaxies does the Doppler Effect help us determine? -
CORRECT ANSWER speeds of galaxies
What does the term "expansion of the universe" refer to? - CORRECT
ANSWER everything in the galaxy moves away from us
The expansion of the universe applies to which objects? - CORRECT
ANSWER objects in cosmic flow
What happens to light as it travels through expanding space? -
CORRECT ANSWER it stretches
What is the Cosmic Microwave Background (CMB) presented as
evidence for? - CORRECT ANSWER big bang theory
What is a key characteristic of the CMB? - CORRECT ANSWER
diffused cold light
What does the CMB tell us about the conditions of the early universe -
CORRECT ANSWER radio waves and visible light travel at the same
speed
, What does dark energy say about accelerating galaxies? - CORRECT
ANSWER measuring acceleration --> dark energy --> pulls galaxy
apart
What are the contents of the universe? - CORRECT ANSWER - 74%
dark energy
- 22% dark matter
- 4% atoms
What does the multiverse say about our universe, compared to others?
- CORRECT ANSWER our universe has complexity
When is the Earth closest to the Sun - CORRECT ANSWER In the
winter in the northern hemisphere
What is the primary factor that causes warmer temperatures on Earth?
- CORRECT ANSWER where sunlight hits Earth's surface more
directly
What is the main cause of Earth's seasons? - CORRECT ANSWER
Earth's tilt of 23.5 degrees
What would happen to the seasons if the Earth's tilt was different? -
CORRECT ANSWER there would be no seasons
What is the motion of the ecliptic? - CORRECT ANSWER west to east
What is the ecliptic? - CORRECT ANSWER the circular path that the
Sun traces out against the background of stars
How long does it take for the Sun to complete one full trip around the
ecliptic? - CORRECT ANSWER one year
How does the movement of the Sun along the ecliptic relate to the
visibility of background stars? - CORRECT ANSWER stars appear
fixed on the celestial sphere
2025 GRADED A {2VERSIONS}
What does Hubble's law describe the relationship between? -
CORRECT ANSWER distances and speeds of galaxies
Why is Hubble's law considered the first law to the Big Bang? -
CORRECT ANSWER it shows galaxies move away from each other
What type of data is Hubble Law based on? - CORRECT ANSWER the
recessional velocities of galxies vs speeds and distances
What are the two main types of shifts mentioned in relation to the
Doppler Effect? - CORRECT ANSWER (1) receding redshift (2)
approaching blueshift
What property of galaxies does the Doppler Effect help us determine? -
CORRECT ANSWER speeds of galaxies
What does the term "expansion of the universe" refer to? - CORRECT
ANSWER everything in the galaxy moves away from us
The expansion of the universe applies to which objects? - CORRECT
ANSWER objects in cosmic flow
What happens to light as it travels through expanding space? -
CORRECT ANSWER it stretches
What is the Cosmic Microwave Background (CMB) presented as
evidence for? - CORRECT ANSWER big bang theory
What is a key characteristic of the CMB? - CORRECT ANSWER
diffused cold light
What does the CMB tell us about the conditions of the early universe -
CORRECT ANSWER radio waves and visible light travel at the same
speed
, What does dark energy say about accelerating galaxies? - CORRECT
ANSWER measuring acceleration --> dark energy --> pulls galaxy
apart
What are the contents of the universe? - CORRECT ANSWER - 74%
dark energy
- 22% dark matter
- 4% atoms
What does the multiverse say about our universe, compared to others?
- CORRECT ANSWER our universe has complexity
When is the Earth closest to the Sun - CORRECT ANSWER In the
winter in the northern hemisphere
What is the primary factor that causes warmer temperatures on Earth?
- CORRECT ANSWER where sunlight hits Earth's surface more
directly
What is the main cause of Earth's seasons? - CORRECT ANSWER
Earth's tilt of 23.5 degrees
What would happen to the seasons if the Earth's tilt was different? -
CORRECT ANSWER there would be no seasons
What is the motion of the ecliptic? - CORRECT ANSWER west to east
What is the ecliptic? - CORRECT ANSWER the circular path that the
Sun traces out against the background of stars
How long does it take for the Sun to complete one full trip around the
ecliptic? - CORRECT ANSWER one year
How does the movement of the Sun along the ecliptic relate to the
visibility of background stars? - CORRECT ANSWER stars appear
fixed on the celestial sphere
