Astronomy Ch 16 Quiz
What is the order of the layers of the sun?
1. Core 2. Radiation Zone 3. Convection Zone 4. Photosphere 5. Chromosphere 6. Corona
How long is the sunspot cycle?
11 years
When does the sunspot cycle repeat?
22 years
What is a net reaction?
4 protons 1 atom he-4 energy
The net result of the proton-proton chain is that _____ protons are fused into a nucleus of _______________________ , two _____________________ are emitted, and energy is released in the form of ___________________________.
4, helium, neutrinos, gamma ray
The two most abundant elements in the Sun make up about _____ percent of its composition (by number of atoms).
99.9
Convection Zone
a region where the material of the sun is in constant motion
Core
center of sun; nuclear reaction
Traveling outward from the surface, the main regions of the solar atmosphere are the _____________, the ________________, and the ________________.
chromosphere, transition zone, and corona
Below the solar surface, in order of increasing depth, lie the _____________ zone, the __________________ zone, and the _________________ .
convection zone, radiation zone, and corona
Sunspots appear dark because they are _____________________ than the surrounding gas of the photosphere.
cooler
What is seen on the surface of the sun (evidence of solar convection)
granulation
The second most abundant element in the Sun is __________________________.
helium
The temperature in the solar corona is extremely ______________ .
high
Corona
hot upper atmosphere
The most abundant element in the Sun is ___________________.
hydrogen
What is luminosity? What is this value for the sun?
is the total amount of energy emitted by a star, galaxy, or other astronomical object per unit time. the properties of size, mass, density, rotation rate, and temp. (total energy)
Energy is released in the proton-proton chain because mass is ______________________ in the process.
lost
Chromosphere
lower atmosphere
The entire solar luminosity is produced in the __________________ (give the region) of the Sun.
photosphere
Radiation Zone
solar energy transported towards the surface by radiation
Where does nuclear fusion happen?
the core
Photosphere
the surface of the sun; emits the radiation we see