astro 1-exam 3 | COMPLETE EXAM QUESTIONS AND
ACCURATE ANSWERS (2025) |ALREADY PASSED!!
what is the sun comprised of? - (ANSWER)73% hydrogen 25% helium
why is the sun stable? - (ANSWER)outward force of gas pressure; inward force of
gravity
fields as diverse as business, law, and mathematics. These disciplines not only have distinct areas of focus but also require unique approaches to assessment, with each exam testing different cognitive abilities, analytical
skills, and subject-specific knowledge. In this essay
Where does the gas pressure in the sun come from? - (ANSWER)nuclear fusion
reactions in the core at temperatures of 15 million degrees
What is the diameter of the sun compared to earth? mass? luminosity (compared
to 100W lightbulbs? - (ANSWER)diameter-109x; mass-333,000; luminosity- 4 x
10^24
What percent of mass in the solar system comes from the sun? - (ANSWER)99.9%
how long has the sun been shining? how much longer will it shine? -
(ANSWER)4.5 billion years; 5.5 billion years
what are sunspots? - (ANSWER)slightly cooler regions on the sun's surface
what causes sunspots? how long are their cycles? - (ANSWER)magnetic activity
preventing hot material from rising to that region. they have 11 year cycles
, what comprises helium-4? What does it release? What is it called? - (ANSWER)4
protons combine to make helium-4 (2 protons, 2 neutrons); produces gamma
rays; it is called the proton-proton chain
fields as diverse as business, law, and mathematics. These disciplines not only have distinct areas of focus but also require unique approaches to assessment, with each exam testing different cognitive abilities, analytical
skills, and subject-specific knowledge. In this essay
What is the first step in Nuclear fusion? - (ANSWER)two protons stick together
and one changes into a neutron to produce deuterium (1 proton and 1 neutron)
What is the second step in Nuclear fusion? - (ANSWER)deuterium plus proton
makes helium-3 (2 protons and 1 neutron bound together)
What is the third step in nuclear fusion? - (ANSWER)two helium-3 molecules
combine to make helium-4 and 2 protons
When is energy created in Nuclear fusion? - (ANSWER)in every step
Where does the energy in Nuclear fusion come from? - (ANSWER)E= mc^2
because the mass of helium is 4 less than the mass of 4 protons
What are the layers of the sun from inside to out? - (ANSWER)core, radiative
zone, connective zone, photosphere, chromosphere, flare, prominence, corona,
solar wind
What is the core of the sun like? - (ANSWER)at center; high density and
temperature; where nuclear reactions occur and gamma rays produced
ACCURATE ANSWERS (2025) |ALREADY PASSED!!
what is the sun comprised of? - (ANSWER)73% hydrogen 25% helium
why is the sun stable? - (ANSWER)outward force of gas pressure; inward force of
gravity
fields as diverse as business, law, and mathematics. These disciplines not only have distinct areas of focus but also require unique approaches to assessment, with each exam testing different cognitive abilities, analytical
skills, and subject-specific knowledge. In this essay
Where does the gas pressure in the sun come from? - (ANSWER)nuclear fusion
reactions in the core at temperatures of 15 million degrees
What is the diameter of the sun compared to earth? mass? luminosity (compared
to 100W lightbulbs? - (ANSWER)diameter-109x; mass-333,000; luminosity- 4 x
10^24
What percent of mass in the solar system comes from the sun? - (ANSWER)99.9%
how long has the sun been shining? how much longer will it shine? -
(ANSWER)4.5 billion years; 5.5 billion years
what are sunspots? - (ANSWER)slightly cooler regions on the sun's surface
what causes sunspots? how long are their cycles? - (ANSWER)magnetic activity
preventing hot material from rising to that region. they have 11 year cycles
, what comprises helium-4? What does it release? What is it called? - (ANSWER)4
protons combine to make helium-4 (2 protons, 2 neutrons); produces gamma
rays; it is called the proton-proton chain
fields as diverse as business, law, and mathematics. These disciplines not only have distinct areas of focus but also require unique approaches to assessment, with each exam testing different cognitive abilities, analytical
skills, and subject-specific knowledge. In this essay
What is the first step in Nuclear fusion? - (ANSWER)two protons stick together
and one changes into a neutron to produce deuterium (1 proton and 1 neutron)
What is the second step in Nuclear fusion? - (ANSWER)deuterium plus proton
makes helium-3 (2 protons and 1 neutron bound together)
What is the third step in nuclear fusion? - (ANSWER)two helium-3 molecules
combine to make helium-4 and 2 protons
When is energy created in Nuclear fusion? - (ANSWER)in every step
Where does the energy in Nuclear fusion come from? - (ANSWER)E= mc^2
because the mass of helium is 4 less than the mass of 4 protons
What are the layers of the sun from inside to out? - (ANSWER)core, radiative
zone, connective zone, photosphere, chromosphere, flare, prominence, corona,
solar wind
What is the core of the sun like? - (ANSWER)at center; high density and
temperature; where nuclear reactions occur and gamma rays produced
