Stars presentation

Multiple Choice

What is light?

• an electromagnetic wave that moves matter

• an electromagnetic wave that transfers energy that doesn't require a medium

• a wave that requires a medium to transfer energy.

• a physical wave that moves mass from one place to another

Multiple Choice

What are small packets of light called?

• atoms

• photons

• neutrons

• electrons

Multiple Choice

What is the speed of light?

• 186,000 miles per second

• 1 billion miles per second

• 1,600,000C

• Constant G

Multiple Choice

Which spectral type of stars has the strongest hydrogen Balmer lines and what is their approximate surface temperature?

• A-type stars, about 10,000 K

• G-type stars, about 5,800 K

• M-type stars, below 3,700 K

• O-type stars, above 30,000 K

Multiple Choice

Which of the following statements about the classification of stars by their spectra is correct?

• It was developed at Harvard College Observatory in the late nineteenth century.

• It was first proposed by Annie Jump Cannon alone.

• It only involved male astronomers.

• It classified stars based on their luminosity only.

Multiple Choice

Using the H-R diagram, what is the hottest, most luminous star type?

• Blue Stars, O class

• Yellow stars, G class

• Red stars, M class

• White stars, F class

Multiple Choice

On the Hertzsprung-Russell diagram, main-sequence stars are typically found along which part of the diagram?

• The red curve

• The top region

• The right region

• The bottom region

Multiple Choice

Which luminosity class indicates main-sequence stars?

• Ia

• III

• V

• IV

Multiple Choice

Which of the following statements about the center of mass in a binary star system is correct?

• It is always at the midpoint between the two stars.

• It is closer to the less massive star.

• It is closer to the more massive star.

• It is outside the system.

Multiple Choice

During a total eclipse in an eclipsing binary system, the dimmer but larger star passes in front of the more luminous but smaller star. What is the result observed?

• The system becomes brighter.

• The system remains unchanged.

• The system becomes so dim it almost disappears.

• The system changes color.

Multiple Choice

Which star is the brightest star in the night sky?

• The Sun

• Betelgeuse

• Sirius

• Polaris