Unit 5: Universe Review

Front

What category does our Sun belong to?

Back

Main Sequence

Front

How does the abundance of hydrogen and helium support the Big Bang theory?

Back

Hydrogen and helium are in the same proportion throughout the universe.

Front

How is our Sun classified compared to other stars?

Back

Medium-sized with an average temperature.

Front

What can be said about the movement of two stars observed from Earth?

Back

Both stars are moving away from us.

Front

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

Back

It will explode and become a supernova.

Front

What is a supernova?

Back

A supernova is a powerful and luminous explosion of a star.

Front

What are the two most abundant elements in the universe?

Back

Hydrogen and helium.

Front

What is the significance of the Main Sequence in stellar classification?

Back

It is the stage where stars spend most of their lifetime, fusing hydrogen into helium.

Front

What is a black hole?

Back

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

Front

What is a red giant?

Back

A red giant is a late stage in the life cycle of a star, characterized by expansion and cooling.