Unit 5: Universe Pre-Test

Front

What are giants in the context of stars?

Back

Giants are a category of stars that are larger and more luminous than main-sequence stars but smaller than supergiants.

Front

What is the significance of the Big Bang in the universe's expansion?

Back

The Big Bang marks the beginning of the universe, and it initiated the expansion that continues today.

Front

Define the term 'Universe'.

Back

The universe is the vast space that contains all matter, energy, galaxies, stars, and planets.

Front

What happens to a massive star after it becomes a supergiant?

Back

After a supergiant, a massive star will explode in a supernova.

Front

What are supergiants?

Back

Supergiants are among the largest stars in the universe, significantly more massive than the Sun.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion that occurs at the end of a massive star's life cycle.

Front

What is the difference between a galaxy and the universe?

Back

A galaxy is a collection of stars, gas, dust, and dark matter bound together by gravity, while the universe encompasses all galaxies and everything else.

Front

What is the main sequence in stellar classification?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What is a black hole?

Back

A black hole is a region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is a planetary nebula?

Back

A planetary nebula is an astronomical object formed from the outer layers of a star that has shed its material at the end of its life cycle.