Unit 5: The Universe Test Review

Front

What is the H-R Diagram used for?

Back

The H-R Diagram (Hertzsprung-Russell Diagram) is used to classify stars based on their luminosity, color, temperature, and evolutionary stage.

Front

Where is Polaris located on the H-R Diagram?

Back

Polaris is located with the Super Giants on the H-R Diagram.

Front

What type of galaxy is characterized by having no defined pattern or shape?

Back

An irregular galaxy has no defined pattern or shape.

Front

What is a galaxy?

Back

A galaxy is a group of single stars, star systems, star clusters, dust, and gas pulled together by gravity.

Front

Which star has an Absolute Magnitude of -8?

Back

Betelgeuse has an Absolute Magnitude of -8.

Front

What determines the color of a star?

Back

The color of a star is determined by its temperature.

Front

What are the main types of galaxies?

Back

The main types of galaxies are spiral, elliptical, and irregular.

Front

What is the significance of Absolute Magnitude in astronomy?

Back

Absolute Magnitude measures the intrinsic brightness of a star, allowing astronomers to compare the true brightness of stars regardless of their distance from Earth.

Front

How does temperature affect a star's color?

Back

Hotter stars emit more blue light and appear blue, while cooler stars emit more red light and appear red.

Front

What is the relationship between a star's mass and its lifespan?

Back

Generally, more massive stars have shorter lifespans because they burn through their nuclear fuel more quickly.