Unit 5: The Universe

Front

What is the biggest star in the sky?

Back

The Sun is not the biggest star; there are larger stars like UY Scuti.

Front

True or False: Red Giants are hotter than White Dwarfs.

Back

False. White Dwarfs are hotter than Red Giants.

Front

What is a supernova?

Back

A supernova is the explosion that occurs at the death of a massive star.

Front

What does the H-R diagram show?

Back

The H-R diagram shows the relationship between temperature and brightness of stars.

Front

What is the name of the explosion at the death of a massive star?

Back

Supernova.

Front

Define a nebula.

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is a Black Hole?

Back

A Black Hole is a region in 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 a large size and a reddish color.

Front

What is the main component of stars?

Back

The main component of stars is hydrogen, which undergoes nuclear fusion to produce energy.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages: nebula, main sequence, red giant, supernova, and either neutron star or black hole.