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HRM3703 Assignment 6; Actual Questions
With Answers 2025
Compared to a high-luminosity main-sequence star, stars in the upper right of the
H-R diagram are - correct-answer-Cooler and larger in radius
Compared to a low-luminosity main-sequence star, stars in the lower left of the H-
R diagram are... - correct-answer-Hotter and smaller in radius
All stars are born with the same basic composition, yet stars can look quite
different from one another. Which two factors primarily determine the
characteristics of a star? - correct-answer-Its mass and its stage of life
Which of the following statements about spectral types of stars is not generally
true? - correct-answer-The spectral type of a star can be used to determine its
distance.
In the late 1800s, Kelvin and Helmholtz suggested that the Sun stayed hot due to
gravitational contraction. What was the major drawback to this idea? - correct-
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answer-It predicted that the Sun could shine for about 25 million years, but
geologists had already found that Earth is much older than this.
From center outward, which of the following lists the "layers" of the Sun in the
correct order? - correct-answer-core, radiation zone, convection zone,
photosphere, chromosphere, corona
Red arrows point outward, green arrows point inward. Long arrows are near the
center, short arrows near the outer surface.
The arrows in this diagram are meant to show how gravitational equilibrium works
in the Sun. What do the different colors and different arrow lengths represent? -
correct-answer-Green arrows represent gravity; red arrows represent pressure;
longer arrows represent a stronger push or pull.
What layer of the Sun are we seeing in this photo? - correct-answer-Photosphere
The dark spots in this photo (such as the one indicated by the arrow) represent
what we call: - correct-answer-Sunspots
HRM3703 Assignment 6; Actual Questions
With Answers 2025
Compared to a high-luminosity main-sequence star, stars in the upper right of the
H-R diagram are - correct-answer-Cooler and larger in radius
Compared to a low-luminosity main-sequence star, stars in the lower left of the H-
R diagram are... - correct-answer-Hotter and smaller in radius
All stars are born with the same basic composition, yet stars can look quite
different from one another. Which two factors primarily determine the
characteristics of a star? - correct-answer-Its mass and its stage of life
Which of the following statements about spectral types of stars is not generally
true? - correct-answer-The spectral type of a star can be used to determine its
distance.
In the late 1800s, Kelvin and Helmholtz suggested that the Sun stayed hot due to
gravitational contraction. What was the major drawback to this idea? - correct-
, 2|Page
answer-It predicted that the Sun could shine for about 25 million years, but
geologists had already found that Earth is much older than this.
From center outward, which of the following lists the "layers" of the Sun in the
correct order? - correct-answer-core, radiation zone, convection zone,
photosphere, chromosphere, corona
Red arrows point outward, green arrows point inward. Long arrows are near the
center, short arrows near the outer surface.
The arrows in this diagram are meant to show how gravitational equilibrium works
in the Sun. What do the different colors and different arrow lengths represent? -
correct-answer-Green arrows represent gravity; red arrows represent pressure;
longer arrows represent a stronger push or pull.
What layer of the Sun are we seeing in this photo? - correct-answer-Photosphere
The dark spots in this photo (such as the one indicated by the arrow) represent
what we call: - correct-answer-Sunspots
