Life Cycle of a Star Review 2

Front

What is the life cycle of a star?

Back

The life cycle of a star refers to the series of stages a star goes through from its formation in a nebula to its eventual death as a white dwarf, neutron star, or black hole.

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, where star formation begins.

Front

What happens during the main sequence stage of a star?

Back

During the main sequence stage, a star fuses hydrogen into helium in its core, producing energy that makes it shine.

Front

What is nuclear fusion?

Back

Nuclear fusion is the process of combining lighter atomic nuclei to form a heavier nucleus, releasing energy in the process.

Front

What is a red giant?

Back

A red giant is a late stage in the life cycle of a star, where it expands and cools after exhausting its hydrogen fuel.

Front

What is a white dwarf?

Back

A white dwarf is the remnant core of a low-mass star that has exhausted its nuclear fuel and shed its outer layers.

Front

How does a star's temperature change as it evolves?

Back

As a star evolves, its temperature can increase or decrease depending on its stage; for example, it gets hotter as it becomes a red giant.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes and stellar classifications, helping to understand star evolution.

Front

What is a supernova?

Back

A supernova is a powerful explosion that occurs at the end of a star's life cycle, often resulting in the formation of a neutron star or black hole.

Front

What is a neutron star?

Back

A neutron star is the collapsed core of a massive star that has undergone a supernova explosion, composed mostly of neutrons.