Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
What was the prevailing belief among cosmologists about the universe for many years?
the universe was static and infinite
the universe was expanding
the universe was finite and dynamic
the universe was contracting
|
What does the red shift in the light spectrum from distant galaxies indicate?
the galaxies are stationary
the galaxies are moving away from us
the galaxies are moving towards us
the galaxies are rotating
|
What does a blue shift in the light spectrum of nearby galaxies suggest?
the galaxies are moving closer to us
the galaxies are not moving
the galaxies are moving away from us
the galaxies are expanding
|
What is the relationship between a galaxy's recessional velocity and its distance from Earth?
exponential
inversely proportional
logarithmic
directly proportional
|
What conclusion can be drawn from the proportional relationship between recessional velocity and distance?
the universe is expanding
the universe is contracting
the universe is static
the universe is infinite
|
In Hubble's law, what does the symbol 'v' represent?
distance to the galaxy
hubble constant
speed of light
recessional velocity
|
If a galaxy is located 75 Mpc away and the Hubble constant is 70 km s-1 Mpc-1, what is its recessional velocity?
10,500 km s-1
7,500 km s-1
1,050 km s-1
5,250 km s-1
|
What does the expansion of the universe, as demonstrated by Hubble's law, imply about the universe's origin?
the universe has always existed
the universe had a beginning
the universe is infinitely old
the universe is contracting
|
What is the term for the speed at which a galaxy moves away from us?
|
Explain the significance of Edwin Hubble's observations in the context of the prevailing belief about the universe at the time.
|
Describe the relationship between a galaxy's recessional velocity and its distance from Earth, as discovered by Hubble.
|
A galaxy is observed to be 100 Mpc away from Earth. If Hubble's constant is estimated to be 70 km s-1 Mpc-1, calculate the recessional velocity of the galaxy.
700 km s-1
7 km s-1
70,000 km s-1
7,000 km s-1
|
If a galaxy is moving away from Earth at a recessional velocity of 5,000 km s-1, using Hubble's constant of 50 km s-1 Mpc-1, what is the galaxy's distance from Earth?
100 Mpc
200 Mpc
150 Mpc
250 Mpc
|