PSU ASTRO 7N EXAM 2 |LATEST UPDATED
2026/2027 |A COMPLETE SOLUTION WITH
VERIFIED QUESTIONS AND ANSWERS |GET IT 100%
CORRECT |GRADED A+
Hydrogen and Helium
What gases make up the sun?
Magnetic Activity
What causes sunspots?
Helium-4
What is made from 4 protons during fusion in the sun?
Deuterium Nucleus (and released energy)
Step 1 of P-P Chain
What forms when two protons collide at very high speeds?
Helium-3 Nucleus
Step 2 of P-P Chain
When deuterium and a proton collide it makes this
Helium-4 Nucleus (and 2 protons and energy)
Step 3 of P-P Chain
Two Helium-3 nuclei combine to make this
Deuterium
1 proton and 1 neutron bound together
Helium-3
2 protons and 1 neutron
, Helium-4
2 protons and 2 neutrons
Core
Central part of sun
High density and temperature
Nuclear reactions occur here
Gamma rays are produced here
Radiative Zone
Region in sun
Photons are re-absorbed and re-emitted
Convective Zone
Region of the sun where gases circulate
Light takes a week to get through
Photosphere
The surface of the sun that we see
Chromosphere
Red/orange
We see through it
Flare
An eruption coming out of the sun due to magnetic activity
Prominence
Hoop-shaped eruption out of the sun due to magnetic activity
Corona
Outer layer of sun
Low density
Only visible during solar eclipses
2026/2027 |A COMPLETE SOLUTION WITH
VERIFIED QUESTIONS AND ANSWERS |GET IT 100%
CORRECT |GRADED A+
Hydrogen and Helium
What gases make up the sun?
Magnetic Activity
What causes sunspots?
Helium-4
What is made from 4 protons during fusion in the sun?
Deuterium Nucleus (and released energy)
Step 1 of P-P Chain
What forms when two protons collide at very high speeds?
Helium-3 Nucleus
Step 2 of P-P Chain
When deuterium and a proton collide it makes this
Helium-4 Nucleus (and 2 protons and energy)
Step 3 of P-P Chain
Two Helium-3 nuclei combine to make this
Deuterium
1 proton and 1 neutron bound together
Helium-3
2 protons and 1 neutron
, Helium-4
2 protons and 2 neutrons
Core
Central part of sun
High density and temperature
Nuclear reactions occur here
Gamma rays are produced here
Radiative Zone
Region in sun
Photons are re-absorbed and re-emitted
Convective Zone
Region of the sun where gases circulate
Light takes a week to get through
Photosphere
The surface of the sun that we see
Chromosphere
Red/orange
We see through it
Flare
An eruption coming out of the sun due to magnetic activity
Prominence
Hoop-shaped eruption out of the sun due to magnetic activity
Corona
Outer layer of sun
Low density
Only visible during solar eclipses
