Stars

Why are some B-class stars more luminous than others?

• They have more hydrogen to burn

• They have greater surface area

• They are on different segments of the main sequence

• They are younger

Why is star #4 less luminous than star #3?

• It has less surface area

• The star is just beginning its life cycle

• The star in not on the main sequence

• The star burns fuel more sowly

Why is star #1 more luminous than star #3

• Star is colder

• Star is smaller

• Star is hotter

• Star is closer

Why is star #5 is less luminous than star #3

• Star is located farther from the earth

• Star reflects less light from the sun

• Star is cooler

• Star is formed millions of years earlier

Which sentence compares the life cycle of low and high mass stars?

• Low-mass stars live longer than high-mass stars.

• High-mass stars live longer than low-mass stars.

• Low-mass stars die in more

• Low mass stars leave the main sequence sooner than high-mass stars

Why do low-mass stars have much longer life cycles than high-mass stars?

• They fuse heavier elements

• They experience much more gravity

• They are much more luminous

• They burn their fuel much more slowly.

Why do cores of low-mass stars transition from white dwarfs to black dwarfs?

• They expand

• They increase their gravity

• They cool

• They emit light

Which statement best describes frequency in relation to light?

• Frequency determines the speed of light

• Frequency determines the color of light

• Frequency determines the brightness of light

• Frequency determines the temperature of light

How does mass affect a star's life cycle?

• The greater a star's mass, the more fusion cycles it undergoes

• The greater a star's mass, the longer the life cycle.

• The greater the star's mass, the more likely it will become a white dwarf

• The greater a star's mass, the longer it takes to fuse its hydrogen

Which of these supports evidence for the Big Bang Theory?

• the intensity of the radiation emitted by the sun

• the location of the asteroid belt

• the abundance of hydrogen, helium and other light elements in the universe

• the fact that the inner planets are rocky, while the outer planets are gaseous