Unit 4 Flashcardizz Review: The Universe

Front

What are the characteristics of the MOST luminous stars?

Back

The MOST luminous stars are large and hot.

Front

What is the difference between a Law and a Theory in science?

Back

A Law is a fact, while a Theory is reasoning based on evidence.

Front

What do we call the force of gravity pulling down on an object?

Back

Weight.

Front

Which type of star has a high temperature and a high luminosity?

Back

Blue Giant.

Front

Is the surface temperature of white dwarf stars higher or lower than red super giants?

Back

Higher.

Front

What is luminosity in the context of stars?

Back

Luminosity is the total amount of energy emitted by a star per unit of time.

Front

What is the relationship between a star's size and its luminosity?

Back

Generally, larger stars are more luminous than smaller stars.

Front

What is the main sequence in stellar classification?

Back

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a low or medium mass star after it has exhausted its nuclear fuel.

Front

What is a red giant?

Back

A red giant is a luminous giant star of low or intermediate mass that has exhausted the supply of hydrogen in its core.