Unit 4 Stars Test

Front

Which of these is NOT used by astronomers to calculate a star’s luminosity? Options: apparent brightness, parallax, distance

Back

samples collected from their surfaces

Front

What is plotted on an H-R diagram? Options: luminosity and temperature, luminosity and distance, temperature and distance, temperature and time

Back

luminosity and temperature

Front

What kind of stars are on the main sequence of an H-R diagram?

Back

stars fusing hydrogen into helium

Front

Which type of star would be found in the upper left area of an H-R diagram?

Back

A hot, blue, high luminosity main sequence star

Front

Which type of star would be found in the lower right area of an H-R diagram?

Back

A cool, red, low luminosity main sequence star

Front

When does a star become a giant or supergiant? Options: after all helium is burned up, when nuclear fusion begins, after a supernova, after core hydrogen is exhausted

Back

after core hydrogen is exhausted

Front

Which type of stars end their lives as a white dwarf? Options: low mass stars, high mass stars

Back

low mass stars

Front

Stars form in clouds that are massive enough for _________ to overcome thermal pressure

Back

gravity

Front

Which type of stars live longer? Options: low mass stars, high mass stars

Back

low mass stars

Front

Which types of stars burn brighter? Options: low mass stars, high mass stars

Back

high mass stars