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Lesson: The Big Bang and the Fate of the Universe

Sample Question Videos

Worksheet • 10 Questions • 1 Video

Q1:

Cosmic microwave background radiation was emitted as radiation just after the big bang. It has been traveling through space since then, and the expansion of the universe has caused the wavelength of the radiation to . We now detect the background radiation as radiation.

  • Agamma, increase, microwave
  • Bmicrowave, increase, radio wave
  • Cmicrowave, decrease, gamma
  • Dgamma, decrease, gamma
  • Emicrowave, increase, microwave

Q2:

Which of the following observations is considered to be evidence for the existence of dark matter?

  • AGalaxies have been observed to spin slower than expected.
  • BThe expansion of the universe has been observed to be accelerating.
  • CSupermassive black holes have been observed to exist at the center of every galaxy.
  • DThe redshift of distant galaxies has been observed to be proportional to their distance away from us.

Q3:

If the density of the universe is than a particular value, then the universe will continue expanding forever. This eventuality is known as the .

  • Aless, Big Rip
  • Bless, Big Splat
  • Cmore, Big Rip
  • Dmore, Big Crunch
  • Eless, Big Crunch

Q4:

Scientists have observed that the expansion of the universe is accelerating. Which of the following is thought to be the cause of this?

  • ADark energy
  • BThe cosmic microwave background
  • CDark matter
  • DGravity
  • EAntimatter

Q5:

Galaxies have been observed to spin much slower than expected. Which of the following is thought to be the cause of this?

  • AEach galaxy contains dark energy, which makes them spin slower.
  • BThere is more matter in each galaxy than can be accounted for by what we can observe. This matter is called dark matter.
  • CGravity is a repulsive force at large distances, therefore stars that are further away from the center of a galaxy orbit the galaxy slower.

Q6:

Which of the following elements was not present in the very early universe (before the formation of stars)?

  • AUranium
  • BHydrogen
  • CLithium
  • DHelium

Q7:

List the following events in chronological order:

  1. The formation of the Sun
  2. The formation of Earth
  3. The big bang
  4. The emission of cosmic microwave background radiation
  5. The discovery of the cosmic microwave background
  • Ac, d, a, b, e
  • Ba, b, c, d, e
  • Cc, a, b, d, e
  • Da, c, b, d, e
  • Ec, a, d, b, e

Q8:

Which element was the most common element present in the very early universe?

  • AHydrogen
  • BSodium
  • CHelium
  • DIron
  • ELithium

Q9:

If the density of the universe is than a particular value, it will stop expanding and begin to contract. This eventuality is known as the .

  • Amore, Big Crunch
  • Bmore, Big Sneeze
  • Cless, Big Crunch
  • Dless, big bang
  • Emore, Big Rip

Q10:

The graph shows the relative size of the universe over time, including two possible outcomes. Point 𝐴 marks the big bang.

What eventuality is marked by point 𝐡 ?

  • AThe Big Crunch
  • BThe Big Spin
  • CThe Big Rip
  • DThe Big Twist
  • EThe Big Yawn

What eventuality is marked by point 𝐢 ?

  • AThe Big Rip
  • BThe Big Bounce
  • CThe Big Crunch
  • DThe Big Sneeze
  • EThe Big Squash
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