Cosmology and the Big Bang Quiz

Who observed that distant galaxies show a redshift in their spectra, indicating that they are moving away from us?

• Edwin Hubble

• Vesto Slipher

• Georges Lemaître

• Alexander Friedmann

What did Georges Lemaître propose based on the redshifts observed in distant galaxies?

• The Universe is contracting

• The Universe is shrinking

• The Universe is static

• The Universe is expanding

What did Edwin Hubble and Milton Humason observe about the relationship between the distance and redshift of galaxies?

• The closer a galaxy was, the slower it appeared to recede from us

• The farther away a galaxy was, the faster it appeared to recede from us

• The closer a galaxy was, the faster it appeared to recede from us

• The farther away a galaxy was, the slower it appeared to recede from us

What did the discovery of the cosmic microwave background radiation confirm?

• The existence of parallel universes

• The existence of black holes

• The Big Bang model of the Universe's early behavior

• The existence of dark matter

What does the redshift of distant galaxies and the cosmic background radiation tell us about the Universe?

• The Universe is expanding

• The Universe is contracting

• The Universe is shrinking

• The Universe is static

What does it mean when we say the Universe is expanding?

• The space itself is expanding, carrying galaxies along with it

• The space itself is shrinking, pulling galaxies along with it

• The galaxies are moving away from each other

• The galaxies are moving towards each other

What did the discovery of the cosmic microwave background radiation help astronomers determine about the age of the Universe?

• The Universe is 10 billion years old

• The Universe is 5 billion years old

• The Universe is 13.82 billion years old

• The Universe is 20 billion years old

What did the Big Bang model predict about the elements in the Universe?

• The elements would not exist in the early Universe

• The ratios of elements compared to hydrogen would match what is observed in the Universe

• The elements would be concentrated in certain regions of the Universe

• The elements would be evenly distributed throughout the Universe

What does the lookback time in cosmology refer to?

• The time it takes for light to travel from the Andromeda galaxy to Earth

• The time it takes for light to travel from the Moon to Earth

• The time it takes for light to travel from the Sun to Earth

• The time it takes for light to travel from distant galaxies to Earth

What did the observations of distant galaxies and the cosmic microwave background radiation help confirm about the Big Bang model?

• The model's predictions about the size and shapes of large structures in the cosmos

• The model's predictions about the elements in the Universe

• The model's predictions about the expansion of the Universe

• The model's predictions about the age of the Universe