DOL #2 Life Cycle of a Star 1-16-25

1. Which of the following best describes the current phase of the Sun and its future?

• A.) The Sun is a red giant and will become a super red giant.
• B. ) The Sun is a main sequence star and will become a red giant.
• C.) The Sun is a super red giant and will explode in a supernova.
• D. ) The Sun is a red dwarf and will shrink into a black hole.

Tags

NGSS.HS-ESS1-1

2. Which of the following best explains how a star's luminosity (brightness) is related to its energy?

• A.) A star with higher energy produces less light and appears dimmer.
• B.) A star with lower energy produces more light and appears brighter.
• C. ) A star's luminosity depends on its energy; stars with more energy shine brighter.
• D. ) A star's luminosity is unrelated to its energy and depends only on its size.

3. What is the main difference between a supernova and a black hole?

• A.) A supernova is the explosion of a dying star, while a black hole is a region in space with gravity so strong that nothing can escape it.
• B.) A black hole explodes with bright light, while a supernova pulls everything around it into its center.
• C.) A supernova happens after a star is born, while a black hole is the first stage of a star's life cycle.
• D.) A black hole and a supernova are the same thing, just called by different names.

4. Rank the following star colors by increasing surface temperature:

• Yellow, orange, red, white, blue
• Red, orange, yellow, white, blue
• Blue, white, yellow, orange, red
• Red, yellow, orange, white, blue

5. Part A Why might classes O, B, and A be more rare to find among the stars based on their temperature and color classification?

• They are the smallest stars.
• They are the youngest stars.
• They are the hottest stars.
• They are the oldest stars.

Tags

NGSS.HS-ESS1-3

Part B Provide a detailed explanation of why classes O, B, and A stars might be more rare based on their temperature and color classification. Consider factors such as their life cycle, energy output, and prevalence in the universe.