Q5 & Q6 Summer 2024 Astronomy 1

Which of these is true about the Big Bang Theory?

• The Big Bang Theory states that the universe has always existed in its current form.
• The Big Bang Theory suggests that the universe is shrinking over time.
• The Big Bang Theory suggests that the universe will end by falling into a black hole.

• The Big Bang Theory explains the early development of the universe as starting from a single point and expanding over time.

Before the Big Bang, there was only

• an undefined void of inescapable terror.

• particles.

• energy.

• empty space.

How long after the Big Bang were nuclei of hydrogen and helium atoms formed?

• Around 10 minutes
• Approximately 5 minutes
• Approximately 3 minutes
• After 1 hour

How cool did the universe have to become for hydrogen and helium atoms to form?

• 4000 Celsius

• 2000 Celsius

• 3000 Celsius

• 5000 Celsius

After 100 million years, atoms of gas came together to form

• Stars

• Fundamental forces like gravity

• Heavier elements

• a structured universe

Who proposed the Big Bang Theory?

• Georges Lemaître
• Albert Einstein
• Isaac Newton
• Geoffrey Leibnitz

Which of these are evidence that support the Big Bang Theory?

• Abundance of hydrogen and helium

• Discovery of dark matter
• Existence of black holes
• Redshifted light spectra

• Cosmic microwave background radiation

The frequencies of spectral lines are unique to each element - like a

• a siren

• fingerprint

• special effect

• serial number

What does the red shift of light spectra in distant galaxies tell us?

• The red shift of light spectra in distant galaxies tells us that those galaxies are stationary.
• The red shift of light spectra in distant galaxies tells us that those galaxies are moving towards us.
• The red shift of light spectra in distant galaxies tells us that those galaxies are rotating.
• The red shift of light spectra in distant galaxies tells us that those galaxies are moving away from us.

What is cosmic microwave background radiation?

• radiation

  from the early universe seen everywhere

• the radiation reflected by planetary objects that illuminate galaxies

• A type of radiation emitted by black holes
• radiation emitted by distant stars called quasars