Cosmos Test Review (Galaxies, Life Cycle of a Star, H-R Diagram)

Front

What color are very hot stars?

Back

Blue

Front

What type of galaxy contains the least amount of gas and dust and old stars, and looks like a flattened ball?

Back

Elliptical Galaxy

Front

What is the previous stage for Alpha Centauri B?

Back

Protostar

Front

What is the H-R Diagram used for?

Back

It is used to classify stars based on their luminosity, color, temperature, and evolutionary stage.

Front

What does a star's color indicate about its temperature?

Back

A star's color indicates its temperature; blue stars are the hottest, while red stars are the coolest.

Front

What is a Nebula?

Back

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

Front

What is a Main Sequence star?

Back

A Main Sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium.

Front

What is a Black Dwarf?

Back

A Black Dwarf is a theoretical stellar remnant that occurs when a white dwarf has cooled sufficiently that it no longer emits significant heat or light.

Front

What is the difference between a brighter star and a dimmer star?

Back

A brighter star emits more light and energy than a dimmer star.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages such as Nebula, Main Sequence, Red Giant, Supernova, and either Neutron Star or Black Hole.