Lesson 10.3.2
10.3.2 Age and ultimate fate of the universe Quiz: Pearson Edexcel Physics, Unit 10
20 questions
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Lesson 10.3.2, Age and ultimate fate of the universe: 20 multiple choice questions for the Pearson Edexcel Physics (9PH0), Unit 10: Space, written with Revision Ninja.
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The 20 questions
-
How can the approximate age of the universe be estimated from the Hubble constant H0?
- 1 / H0
- H0
- H0 squared
- 1 / (H0 squared)
-
What is the unit of the Hubble constant H0?
- s^-1 Mpc^-1 km^2
- Mpc s^-1
- km s^-1 Mpc^-1
- km s^-1
-
How does dark matter influence the ultimate fate of the universe?
- Adds gravitational attraction
- Decreases mass density
- Repels distant galaxies
- Accelerates cosmic expansion
-
What is the ultimate fate of a universe with a density above the critical density?
- Infinite expansion
- Constant size
- It recollapses
- Thermal death
-
If the Hubble time 1/H0 is about 14 billion years for H0 = 70 km s^-1 Mpc^-1, which value is closest to the Hubble time for H0 = 50 km s^-1 Mpc^-1?
- about 2 billion years
- about 200 billion years
- about 20 billion years
- about 5 billion years
-
If the estimated value of the Hubble constant is doubled, what happens to the estimated age of the universe?
- It doubles
- It halves
- It stays constant
- It quadruples
-
What is the approximate Hubble time for H0 = 70 km s^-1 Mpc^-1?
- about 140 million years
- about 1.4 trillion years
- about 4.4 billion years
- about 14 billion years
-
Which quantity's uncertain value leads to conflicting estimates for the age of the universe?
- Rydberg constant
- Hubble constant
- Critical density
- Boltzmann constant
-
How does additional mass in the universe affect the likelihood of its eventual recollapse?
- Has no effect
- Increases likelihood
- Prevents recollapse
- Decreases likelihood
-
Which astronomical observations provided evidence that the expansion of the universe is accelerating?
- Type Ia supernovae
- Cepheid variable stars
- Galactic rotation curves
- Cosmic microwave background
-
In a flat universe containing no dark energy, how does the expansion rate change over time?
- Remains constant
- Decelerates continuously
- Accelerates continuously
- Reverses immediately
-
Why is 1/H0 only an approximation for the actual age of the universe?
- Expansion rate changes
- Mass is constant
- Gravity is zero
- Light speed varies
-
How does dark matter primarily influence the ultimate fate of the universe?
- By emitting radiation
- Through gravitational attraction
- By increasing temperature
- Through dark energy
-
What effect does stronger gravitational attraction have on the deceleration rate of cosmic expansion?
- Causes acceleration
- Increases deceleration
- Decreases deceleration
- No effect
-
How does a lower value of the Hubble constant affect the estimated age of the universe?
- Increases estimated age
- Decreases estimated age
- Halves estimated age
- Has no effect
-
Which two quantities are related by the Hubble constant in Hubble's law?
- Speed and distance
- Temperature and luminosity
- Mass and velocity
- Redshift and mass
-
A galaxy is at a distance that makes its recession speed 14000 km s^-1 with H0 = 70 km s^-1 Mpc^-1. What is its distance?
- 20 Mpc
- 70 Mpc
- 2000 Mpc
- 200 Mpc
-
Which quantity is the constant of proportionality in Hubble's law?
- v
- d
- H0
- z
-
A galaxy lies at 500 Mpc. With H0 = 70 km s^-1 Mpc^-1, what is its recession speed?
- 7000 km s^-1
- 35000 km s^-1
- 70000 km s^-1
- 3500 km s^-1
-
What physical unit is obtained when taking the reciprocal of the Hubble constant, 1/H0?
- Joules
- Seconds
- Kilograms
- Metres
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