Big Bang Theory

What is a galaxy?

• A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter.

• A collection of planets orbiting a single star.

• A large cloud of gas and dust in space without any stars.

• A small group of stars that are gravitationally bound together.

What is the estimated age of the Universe?

• 10 billion years old

• 13.8 billion years old

• 15 billion years old

• 12 billion years old

What is the role of dark energy in the universe?

• It is responsible for the accelerated expansion of the universe.

• It causes the universe to contract over time.

• It has no effect on the universe's expansion.

• It is a form of matter that makes up most of the universe.

What did the universe look like at the beginning according to the Big Bang Theory?

• The universe was much hotter and smaller.

• The universe was cold and vast.

• The universe was filled with dark matter only.

• The universe was stable and unchanging.

What is the significance of redshift in astronomy?

• It indicates that galaxies are moving away from us.

• It shows the temperature of stars.

• It measures the brightness of celestial objects.

• It determines the distance of planets from Earth.

What is the Milky Way?

• A type of star

• A planet in our solar system

• The galaxy that contains our solar system.

• A black hole in space

What happens to galaxies over time according to the Big Bang Theory?

• Galaxies are moving away from us.

• Galaxies are merging into larger structures.

• Galaxies are becoming more stable and static.

• Galaxies are collapsing into black holes.

What is the observable universe?

• The part of the universe that we can see and measure.

• The entire universe including all galaxies and stars.

• Theoretical concepts of the universe beyond our reach.

• The universe as it existed at the moment of the Big Bang.

What does the Big Bang Theory explain?

• The origin of the universe.

• The formation of black holes.

• The evolution of species.

• The structure of DNA.

What is NOT true about the Big Bang Theory?

• It is the scientific explanation of how life began on Earth and evolved over time.

• It describes the expansion of the universe from a singularity.

• It suggests that the universe is approximately 13.8 billion years old.

• It explains the formation of galaxies and cosmic structures.