CFA SC.8.E.5.5

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made up of gas that give off light

• faint dots of light that can be seen from Earth’s surface

• objects that form in the outer parts of the solar system

What information do we need to calculate the absolute magnitude of a star?

• color and temperature of the star

• color and composition of the star

• apparent magnitude and distance from Earth of the star

• color and distance from Earth of the star

Which one of these conclusions can be drawn based on the graph?

• Absolute magnitude is not related to the color of a star.

• Blue stars are farther from Earth than red stars.

• Large stars are generally more luminous than smaller stars.

• A blue star will appear brighter from Earth’s surface than a red star.

Which one of these conclusions can be drawn based on the graph?

• Absolute magnitude is not related to the color of a star.

• Blue stars are farther from Earth than red stars.

• Blue stars are generally more luminous than red stars.

• A blue star will appear brighter from Earth’s surface than a red star.

One physical property of a star is apparent magnitude. Which of the following is used in determining the apparent magnitude of a star?

• A. the constellation the star is in

• B. the distance the star is from Earth

• C. the number of times the star rotates

• D. the number of prominences the star makes