Star Life Cycle
Star Life Cycle 2
Galaxy Characteristics
Hertzsprung-Russell diagram
HR diagrams
100
Which type of star ends its life cycle in the form of a neutron star or a black hole?
High-Mass Star
100
All stars start out as...
Protostars-
stellar nebula
100
Flat galaxies that form with no spiral structures and have no ability to form new stars due to the decrease in gas and dust are categorized as what type of galaxy?
A. Irregular
B. Spiral
C. Regular
D. Elliptical
D. Elliptical Galaxy
100
- What features of stars are plotted on the Hertzsprung-Russell diagram?
Luminosity and Temperature
100
Put the colors of stars in order from HOTTEST to COOLEST.
Blue, White, Yellow, Orange, Red
200
What determines the life path a star will take?
Mass
200
Where are stars "born"?
Star forming nebulas
200
What galaxy would be classified as an irregular galaxy?
a. 
b. 
c. 
d.
Irregular Galaxy
200
Which of the following statements does not accurately describe the Hertzsprung-Russell diagram?
- A. Bright stars are located at the top of the diagram.
- B. Dim stars are located at the bottom of the diagram.
- C. Hot stars are located on the left side of the diagram.
- D. Cool stars are located on the left side of the diagram.
- D. Cool stars are located on the left side of the diagram.
200
Based on this diagram, which type of stars would belong to spectral class M and have the highest luminosity?
Supergiants
300
Which stage in the life cycle of a high-mass star is characterized by the star collapsing and throwing its outer layers into space?
Super Nova
300
What type of stars go supernova?
High mass stars (only red SUPERgiants)
300
Which of the following galaxies is most like our own galaxy, the Milky Way?
A. 
B
C. 
D. 
Spiral Galaxy
300
What band on the HR-Diagram represents the area where most stars live their life?
A. the upper-left quadrant
B. the lower-left quadrant
C. the upper-right quadrant
D. the diagonal band that runs from the upper-left to the lower-right
D. the diagonal band that runs from the upper-left to the lower-right
300
Based on the above diagram, which type of stars belong to spectral class K and have the lowest luminosity?
Main Sequence
400
At the end of its life cycle, a high-mass star sometimes leaves behind an invisible object in which gravity is so strong that radiation cannot escape. What do we call this object?
Black Hole
400
What will our sun eventually turn into?
Red giant in about 5.5 billion years
400
Which of the following statements BEST describes the difference between a spiral galaxy and an elliptical galaxy?
A. A spiral galaxy consists of mostly young starts with arms radiating out from the center. An elliptical galaxy contains middle-aged stars and does not have a definite shape.
B. An elliptical galaxy has young stars and is circular in shape. A spiral galaxy has young stars and does not have a definite shape.
C. An elliptical galaxy consists of mostly young starts with arms radiating out from the center. A spiral galaxy contains old stars and is circular in shape.
D. A spiral galaxy consists of mostly young starts with arms radiating out from the center. An elliptical galaxy contains old stars and is circular in shape.
D. A spiral galaxy consists of mostly young starts with arms radiating out from the center. An elliptical galaxy contains old stars and is circular in shape.
400
Describe a star located at the top left corner of an HR diagram.
Bright and hot
400
Zeta Eridani
500
What kind of star becomes a giant when fusion slows down, the outer atmosphere of the star expands, luminosity increases, and the star begins to fuse helium into carbon?
Low-Mass Star, Main Sequence Average Star
500
What process occurs throughout most of a star’s lifetime?
Nuclear Fusion
500
What Arm is the Milky Way Solar System on?
ORION
500
What percent of stars are in the main sequence stage of life and why?
90% because stars spend most of their lives in this stage.
500
Barnard's Star