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Temperature of Stars Quiz

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Questions and Answers

What category of stars is the hottest?

O (correct)

Which group of stars appears light yellow to orange?

F through K (correct)

O through A

What type of objects are cooler than 2500 degrees and are not considered stars?

Brown dwarfs (correct)

M-class stars

O-class stars

G yellow dwarf stars

How is star temperature and color tracked based on observed photon intensity?

Photon intensity Signup and view all the answers

Why do hotter objects emit shorter wavelengths of light?

They increase energy output Signup and view all the answers

What is the primary tool used to categorize and sort stars based on their spectra?

Stellar classification Signup and view all the answers

How do astronomers measure the temperature of stars?

In Kelvin Signup and view all the answers

What happens to our sun closer to the end of its life?

It expands into a red giant Signup and view all the answers

What process fuels stars in their cores?

Nuclear fusion reactions Signup and view all the answers

What characteristic of a star determines the speed of nuclear fusion reactions in its core?

Size Signup and view all the answers

What determines the spectrum of electromagnetic energy re-emitted by a blackbody?

The object's temperature Signup and view all the answers

Which of the following is true about the peak of a blackbody curve for a star?

It is often located within or near the visible spectrum Signup and view all the answers

According to Wien's Law, what happens to the emitted wavelength as the temperature of an object increases?

The emitted wavelength decreases Signup and view all the answers

What is the relationship between the temperature of a star and the color it appears?

Hotter stars appear blue, and cooler stars appear red Signup and view all the answers

What information can astronomers determine from the wavelength of light emitted by a star on a blackbody curve?

The star's temperature Signup and view all the answers