Formation of the universe: What is the estimated age of the universe?

• 5 million years

• 100 billion years

• 13.8 billion years

• 1 trillion years

Formation of the universe: What is the theory that suggests the universe began as a singularity and has been expanding ever since?

• String Theory

• Steady State Theory

• Big Bang Theory

• Multiverse Theory

Formation of the universe: What is the name of the theory that suggests the universe began from a rapid expansion of a very high-density and high-temperature state?

• Big Bang Theory

• String Theory

• Steady State Theory

• Quantum Theory

Galaxies and their types: What type of galaxy is the Milky Way?

• Elliptical galaxy

• Black hole galaxy

• Spiral galaxy

• Irregular galaxy

Galaxies and their types: What is the name of the galaxy that is closest to the Milky Way?

• Triangulum Galaxy

• Whirlpool Galaxy

• Andromeda Galaxy

• Orion Galaxy

Galaxies and their types: What are the three main types of galaxies?

• Spiral, elliptical, and irregular

• Red, blue, green

• Round, square, triangle

• Big, medium, small

The Big Bang theory: What evidence supports the Big Bang theory?

• The cosmic microwave background radiation, the abundance of light elements, and the redshift of galaxies.

• The observation of black holes in the universe

• The discovery of dark matter and dark energy

• The existence of multiple universes

The Big Bang theory: What is the cosmic microwave background radiation and how does it support the Big Bang theory?

• It is the reflection of Earth's atmosphere, disproving the theory of the universe's early hot and dense state

• It is the result of recent cosmic explosions, contradicting the theory of a single Big Bang event

• It is the afterglow of the Big Bang, supporting the theory by providing evidence of the universe's early hot and dense state.

• It is the radiation emitted by black holes, challenging the theory of the Big Bang

The Big Bang theory: What is the estimated age of the universe according to the Big Bang theory?

• 100 million years

• 5 billion years

• 20 trillion years

• 13.8 billion years

The life cycle of stars: What is the first stage in the life cycle of a star?

• Formation of a black hole

• Expansion of a star

• Death of a star

• Formation of a protostar