ASTRO 7N EXAM 2 COMPREHENSIVE
ASSESSMENT 2026 TESTED QUESTIONS
◉ Magnetic Activity. Answer: What causes sunspots?
◉ Helium-4. Answer: What is made from 4 protons during fusion in
the sun?
◉ Deuterium Nucleus (and released energy). Answer: Step 1 of P-P
Chain
What forms when two protons collide at very high speeds?
◉ Helium-3 Nucleus. Answer: Step 2 of P-P Chain
When deuterium and a proton collide it makes this
◉ Helium-4 Nucleus (and 2 protons and energy). Answer: Step 3 of
P-P Chain
Two Helium-3 nuclei combine to make this
◉ Deuterium. Answer: 1 proton and 1 neutron bound together
◉ Helium-3. Answer: 2 protons and 1 neutron
,◉ Helium-4. Answer: 2 protons and 2 neutrons
◉ Core. Answer: Central part of sun
High density and temperature
Nuclear reactions occur here
Gamma rays are produced here
◉ Radiative Zone. Answer: Region in sun
Photons are re-absorbed and re-emitted
◉ Convective Zone. Answer: Region of the sun where gases circulate
Light takes a week to get through
◉ Photosphere. Answer: The surface of the sun that we see
◉ Chromosphere. Answer: Red/orange
We see through it
◉ Flare. Answer: An eruption coming out of the sun due to magnetic
activity
, ◉ Prominence. Answer: Hoop-shaped eruption out of the sun due to
magnetic activity
◉ Corona. Answer: Outer layer of sun
Low density
Only visible during solar eclipses
◉ Luminosity. Answer: The true brightness of the star
The absolute power output
◉ Brightness. Answer: Apparent output of something observed at a
certain distance
◉ Inverse-Square Law. Answer: B=L/(4pi(d^2))
◉ 4. Answer: If star A is (X) times as luminous as star B, then stars A
and B would appear equally bright if star A were 2 times as far away
as star B
◉ Parallax Method. Answer: D=1/p
D= Distance in parsecs
p= Parallax angle in arc seconds (1/3600)
ASSESSMENT 2026 TESTED QUESTIONS
◉ Magnetic Activity. Answer: What causes sunspots?
◉ Helium-4. Answer: What is made from 4 protons during fusion in
the sun?
◉ Deuterium Nucleus (and released energy). Answer: Step 1 of P-P
Chain
What forms when two protons collide at very high speeds?
◉ Helium-3 Nucleus. Answer: Step 2 of P-P Chain
When deuterium and a proton collide it makes this
◉ Helium-4 Nucleus (and 2 protons and energy). Answer: Step 3 of
P-P Chain
Two Helium-3 nuclei combine to make this
◉ Deuterium. Answer: 1 proton and 1 neutron bound together
◉ Helium-3. Answer: 2 protons and 1 neutron
,◉ Helium-4. Answer: 2 protons and 2 neutrons
◉ Core. Answer: Central part of sun
High density and temperature
Nuclear reactions occur here
Gamma rays are produced here
◉ Radiative Zone. Answer: Region in sun
Photons are re-absorbed and re-emitted
◉ Convective Zone. Answer: Region of the sun where gases circulate
Light takes a week to get through
◉ Photosphere. Answer: The surface of the sun that we see
◉ Chromosphere. Answer: Red/orange
We see through it
◉ Flare. Answer: An eruption coming out of the sun due to magnetic
activity
, ◉ Prominence. Answer: Hoop-shaped eruption out of the sun due to
magnetic activity
◉ Corona. Answer: Outer layer of sun
Low density
Only visible during solar eclipses
◉ Luminosity. Answer: The true brightness of the star
The absolute power output
◉ Brightness. Answer: Apparent output of something observed at a
certain distance
◉ Inverse-Square Law. Answer: B=L/(4pi(d^2))
◉ 4. Answer: If star A is (X) times as luminous as star B, then stars A
and B would appear equally bright if star A were 2 times as far away
as star B
◉ Parallax Method. Answer: D=1/p
D= Distance in parsecs
p= Parallax angle in arc seconds (1/3600)
