An object that acts as a blackbody emits photons because ____.
A spectrum that displays a smooth variation in intensity of all wavelengths without any breaks is a(n) ____ spectrum.
The photons coming from blackbody radiation create a(n) ____ spectrum.
The type of element is determined by the number of ____.
The arrangement of permitted orbits is ____.
The photons coming from an excited gas create a(n) ____ spectrum.
Photons of light can be absorbed by an atom of an element ____.
Blackbody radiation is caused by an object’s ____.
An atom must emit a photon when a(n) ____.
A hot object that is glowing orange will become redder as it cools.
As a blackbody becomes hotter it will radiate ____.
If the photons from blackbody radiation pass through a cool gas, a(n) ____ spectrum is produced.
The wavelength of maximum intensity is useful in measuring the ____.
Nuclear fusion within the Sun proceeds step-by-step in a series of reactions called the neutron–neutron chain.
The Babcock model of the solar magnetic cycle explains the sunspot cycle as primarily a consequence of the Sun’s ____.
Galileo proposed that the Sun is a rotating sphere after he ____.
What occurs on the surface of the Sun during a solar cycle minimum?
Granules on the Sun’s photosphere can be several thousand kilometers across.
Astronomers often record solar images in the ____ part of the electromagnetic spectrum because the gaseous layers high in the Sun’s atmosphere are very hot and emit most of their light at short wavelengths.
The corona is so dim that it is not visible in Earth’s daytime sky.
The temperature of the Sun is determined by measuring the __________ of sunlight.
What is the approximate average temperature of the Sun’s surface?
During the first reaction of the proton-proton chain of nuclear fusion, a weak force causes one of the protons to transform into a neutron and emit ____.
What causes granulation on the photosphere?
In order for nuclear fusion to occur, atomic nuclei must overcome the ____ by colliding violently.
During nuclear fusion, four hydrogen nuclei fuse into how many helium?
Which is the correct order of the Sun’s atmospheric layers, from the innermost to outermost?
Sunspots are parts of active solar regions dominated by magnetic fields that encompass all layers of the Sun’s atmosphere.