HR Diagram 2

HR Diagram 2

Assessment

Flashcard

Science

8th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the HR Diagram?

Back

The HR Diagram (Hertzsprung-Russell Diagram) is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

2.

FLASHCARD QUESTION

Front

What spectral class is the sun classified in?

Back

The sun is classified as a main-sequence star in spectral class G.

3.

FLASHCARD QUESTION

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 in its core.

4.

FLASHCARD QUESTION

Front

What are the characteristics of spectral class O stars?

Back

Spectral class O stars are very hot (over 30,000 K), very bright, and are typically blue in color.

5.

FLASHCARD QUESTION

Front

How do main-sequence stars in spectral class M compare to those in spectral class B?

Back

Main-sequence stars in spectral class M are cooler and less bright than those in spectral class B.

6.

FLASHCARD QUESTION

Front

What is luminosity in the context of stars?

Back

Luminosity is the total amount of energy emitted by a star per unit time, often compared to the sun's luminosity.

7.

FLASHCARD QUESTION

Front

What is the temperature range for spectral class K stars?

Back

Spectral class K stars have temperatures ranging from about 3,900 K to 5,200 K.

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