Physics 121- Quiz 7 and answers already
passed 2025
If a star is on the main sequence, it is actively fusing hydrogen into helium. -
correct answer ✔True
If a star is in hydrostatic equilibrium - correct answer ✔pressure from the
core is exactly balanced by gravity pulling inward.
The Sun's spectral type and temperature are - correct answer ✔G2; 5800 K
The Sun's absorption lines tell us - correct answer ✔which elements are
present in the Sun's atmosphere.
The Sun's "surface" is its - correct answer ✔photosphere.
The Sun's corona is actually much hotter than the layers below it (except the
core). - correct answer ✔True
The Sun's differential rotation produces - correct answer ✔Sunspots
Although sunspots are cooler than surrounding regions, it would still be
brighter than the full Moon in the night sky. - correct answer ✔True
The Sun's radiative zone takes up the majority of its volume. (i.e. more than
50%) - correct answer ✔False
passed 2025
If a star is on the main sequence, it is actively fusing hydrogen into helium. -
correct answer ✔True
If a star is in hydrostatic equilibrium - correct answer ✔pressure from the
core is exactly balanced by gravity pulling inward.
The Sun's spectral type and temperature are - correct answer ✔G2; 5800 K
The Sun's absorption lines tell us - correct answer ✔which elements are
present in the Sun's atmosphere.
The Sun's "surface" is its - correct answer ✔photosphere.
The Sun's corona is actually much hotter than the layers below it (except the
core). - correct answer ✔True
The Sun's differential rotation produces - correct answer ✔Sunspots
Although sunspots are cooler than surrounding regions, it would still be
brighter than the full Moon in the night sky. - correct answer ✔True
The Sun's radiative zone takes up the majority of its volume. (i.e. more than
50%) - correct answer ✔False
