8th Stars & Galaxies

Front

Sunspots are dark splotches on the Sun. Which statement is true?

Back

They are extremely hot, but cooler than the surrounding areas of the Sun. They are associated with areas of high magnetic field lines.

Front

Which of these are not associated with the active Sun? Coronal Mass Ejections CME, Prominences, Solar Flares, Granulation

Back

Granulation

Front

On the H-R diagram, the Sun lies

Back

about the middle of the main sequence

Front

Energy is produced within a star's core by the process of

Back

nuclear fusion

Front

Why does the Sun appear brighter than the star Rigel to an observer on Earth?

Back

closer than Rigel

Front

What is the general relationship between the temperature and the luminosity of main sequence stars?

Back

As temperature increases, luminosity increases.

Front

What elements make up most of the sun’s mass?

Back

hydrogen and helium

Front

What does this diagram show? Options: the morphological classification of galaxies, the evolutionary sequence of galaxies, the color classification of stars, the life cycle sequence of stars

Back

the life cycle sequence of stars

Front

An average star’s life would follow which order: white dwarf, main sequence, giant; main sequence, white dwarf, giant; main sequence, giant, white dwarf; giant, main sequence, white dwarf?

Back

main sequence, giant, white dwarf

Front

What color are the hottest stars?

Back

blue