Unit 1 Earth Science - The Big Bang Theory

Which of the following best describes the Doppler Effect?

• The phenomenon where waves become more intense as the source moves away from the observer.

• The change in the frequency of a wave as the source and observer move relative to each other

• The change in the amplitude of a wave when the source is moving at a constant speed.

• The change in the direction of a wave due to the motion of the observer.

Redshift in the context of astronomy refers to:

• A shift in the spectrum of light to longer wavelengths as an object moves away from the observer.

• A phenomenon where light waves are absorbed by a planet's atmosphere.

• A shift in the color of light when an object moves closer to the observer.

• A shift in the spectrum of light to shorter wavelengths as an object moves away from the observer.

What does the observation of the redshift in light from distant galaxies tell us about the universe?

• The universe is expanding, and galaxies are moving away from each other.

• The universe is shrinking over time.

• The universe is in a stable state with no changes.

• The expansion of the universe stopped billions of years ago.

Which of the following is a key piece of evidence supporting the Big Bang theory?

• The presence of black holes in every galaxy.

• The discovery of dark matter in distant galaxies.

• The cosmic microwave background radiation.

• The uniform distribution of stars across the universe.

Which of the following is not evidence supporting the Big Bang theory?

• The uniform distribution of elements such as hydrogen and helium in the universe.

• The observed redshift of distant galaxies.

• Cosmic microwave background radiation.

• The steady-state theory of the universe.

Cosmic microwave background radiation is:

• The leftover heat from the Big Bang, detectable in all directions of the universe.

• Radiation emitted by stars in the Milky Way galaxy.

• A type of radiation emitted by black holes.

• A signal created by galaxies interacting with each other

What does the theory of cosmic inflation propose about the early universe?

• The universe was static and did not change in size after the Big Bang.

• The universe expanded slowly at a steady rate after the Big Bang.

• The universe remained the same size for millions of years before expanding.

• The universe expanded at an extremely rapid rate in the first fraction of a second after the Big Bang.

Big Bang nucleosynthesis primarily explains the formation of which of the following elements in the early universe?

• Hydrogen and nitrogen

• Helium and helium

• Carbon and oxygen

• Iron and uranium

What occurred during the process of recombination in the early universe?

• Electrons and protons combined to form the first atoms

• Galaxies and stars first began to form from primordial gas clouds.

• Light elements like helium and lithium were formed from protons and neutrons.

• The universe expanded at an incredibly rapid rate.

What is the primary force responsible for the formation of galaxies?

• Gravitational force

• Nuclear force

• Electromagnetic force

• Weak force