TEKS 8.8A Universe Test Review PER 4

Front

What does the Hertzsprung-Russell Diagram illustrate?

Back

The Hertzsprung-Russell Diagram illustrates the relationship between the luminosity, temperature, and spectral classification of stars.

Front

How do Vega and Barnard's Star compare in terms of temperature and brightness?

Back

Vega is hotter and brighter than Barnard's Star.

Front

What type of galaxy is characterized by spiral arms?

Back

A spiral galaxy.

Front

Which spectral class of stars has the lowest luminosity?

Back

Spectral class M stars, which are main sequence stars.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.

Front

Is the following chemical equation balanced according to the Law of Conservation of Mass? 3 H2 + N2 → 2 NH3

Back

Yes, it is balanced according to the Law of Conservation of Mass.

Front

Where is Earth’s solar system located within the Milky Way galaxy?

Back

Near the end of an arm of the Milky Way galaxy.

Front

What is the significance of the spectral classification of stars?

Back

Spectral classification categorizes stars based on their temperature and the characteristics of their light spectrum.

Front

What are the main components of a spiral galaxy?

Back

The main components of a spiral galaxy include a central bulge, spiral arms, and a halo of stars and dark matter.

Front

What is the difference between main sequence stars and giant stars?

Back

Main sequence stars are in a stable phase of hydrogen burning, while giant stars have exhausted hydrogen in their cores and have expanded.