Star Test 2024 Trout AA

Name.....First then last

Which of the following best describes a star? A star is a celestial body ---

• composed of rock and metal with a very high density
• that is too big to be an asteroid, but too small to be a planet.
• that rotates on an axis and revolves around the Sun
• composed of gases that emit light due to nuclear reactions

Based on this diagram which type of stars would belong to spectral class M and have the lowest luminosity?

• Main Sequence Stars
• Giants
• Super Giants
• White Dwarfs

Based on this diagram which type of stars would belong to spectral class B and have the highest temperature and lowest luminosity?

• Main Sequence Stars
• Giants
• Super Giants
• White Dwarfs

Use the Hertzsprung-Russell Diagram to answer the following question. Betelgeuse is a _____

• Hot and Bright Star
• Cool and Bright Star
• Hot and Dim Star
• Cool and Dim Star

Use the Hertzsprung-Russell Diagram to answer the following question. Sirius B is a _____

• Hot and Bright Star
• Cool and Bright Star
• Hot and Dim Star
• Cool and Dim Star

What is the reason that a main sequence star changed to a red giant?

• Helium runs out
• Hydrogen runs out
• The star explodes
• I have no idea

Use the Hertzsprung-Russell Diagram to answer the following question. Zeta Eridoni is a _____

• Hot and Bright Star
• Cool and Bright Star
• Hot and Dim Star
• Cool and Dim Star

Use the Hertzsprung-Russell Diagram to answer the following question. Barnard's star is a _____

• Hot and Bright Star
• Cool and Bright Star
• Hot and Dim Star
• Cool and Dim Star

Black holes are best described as:

• space fillers
• holes
• a place in space where gravity pulls so much even light can't get out
• gravity bombs