HR Diagrams

Front

What is the process by which a star changes over its lifetime?

Back

Life cycle

Front

Order the components of the universe from largest to smallest: universe, galaxy, solar system, star, planet.

Back

Universe, galaxy, solar system, star, planet

Front

What happens to stars as we move to the left on the HR diagram?

Back

Stars get hotter

Front

What color are the coolest stars?

Back

Red

Front

What percentage of all stars are main sequence stars?

Back

Ninety percent

Front

What is the HR diagram used for?

Back

To classify stars based on their luminosity, temperature, and evolutionary stage.

Front

What type of star is the Sun classified as?

Back

Main sequence star

Front

What are the two main axes of the HR diagram?

Back

Luminosity (vertical axis) and temperature (horizontal axis).

Front

What is a white dwarf?

Back

A small, dense star that is the remnants of a low-mass star after it has exhausted its nuclear fuel.

Front

What is a supergiant star?

Back

A very large star that is much brighter than a main sequence star and has a short lifespan.