HR Diagrams Stars EM Spectrum

Which of the following best identifies a difference between apparent magnitude and luminosity in stars?

• The luminosity of a star will remain constant over the life of a star, but its apparent magnitude will change daily.

• Two stars can have the same luminosity but different apparent magnitudes, depending on how far away they are.

• The measurement of the luminosity of a star depends on the position of the observer; apparent magnitude does not.

• Luminosity is always given as a numerical value; apparent magnitude has no numeric value.

The Hertzsprung-Russell diagram is used for classifying stars based on the relationship between their brightness and their temperature and color. A diagram is provided.

Which of the following is a trend among the main sequence stars?

• The larger stars emit light that is blue.

• Stars dimmer than the Sun are of class O or B

• The hotter the star, the more brightly it burns.

• Most of the stars are white or red.

Tags

NGSS.HS-ESS1-3

Which of the following is NOT a physical property commonly used by scientist to classify stars?

• Apparent magnitude

• Absolute magnitude (luminosity)

• Temperature

• State of matter

What is a large cloud of hot gas and dust called? It is the birthplace of stars?

• black hole

• nebula

• neutron star

• luminosity

An object with the mass of four suns squeezed into 10 km where nothing (not even light) can escape its gravity is called a

• black hole

• neutron star

• white dwarf

• electron cloud

A Hertzsprung-Russell diagram is provided.

In comparison to the Sun, which of the following best describes Betelgeuse?

• Smaller in diameter

• Brighter and hotter

• Less bright, but hotter

• Cooler and brighter

Mia has created a chart listing the brightness of stars as seen by an observer on Earth. Which of the following is the best title for this chart?

• Color

• Apparent Magnitude

• Size (diameter)

• Absolute magnitude (luminosity)

Jose is looking at stars with his farther and notices some of the stars are brighter than others. Jose's father tells him that the brightness of a star is one way that scientists determine the star's magnitude. What other property, which Jose and his father might observe, is used by scientists to classify stars?

• The star's rotation

• The constellation the star is in

• The star's color

• The gas that makes up the star

A Hertzsprung-Russell diagram is provided. This diagram shows important information about the properties of stars.

Elissa's teacher has provided her with a Hertzsprung-Russell diagram and a table showing the colors of several stars. Elissa could best identify the hottest star on the table by looking for the star that is what color?

• Red

• Yellow

• White

• Blue

What color stars are the hottest in temperature?

• Orange

• White

• Red

• Blue