Question 1

Emission lines are produced by ____.

Accepted Answer

A)  atoms that become ionized 
B)  electrons that transfer from a high energy level to a low energy level 
C)  electrons that transfer from a low energy level to a high energy level 
D)  the intensity of agitation of atoms in a hot gas 
E)  the motion of an object toward or away from the observer 
A)  atoms that become ionized 
B)  electrons that transfer from a high energy level to a low energy level 
C)  electrons that transfer from a low energy level to a high energy level 
D)  the intensity of agitation of atoms in a hot gas 
E)  the motion of an object toward or away from the observer

Question 2

A continuous spectrum is created by a hot ionized gas.

Accepted Answer

A) True 
 B)False

Question 3

A hot blackbody emits a(n) _______________ spectrum.

Accepted Answer

continuous

Question 4

Small differences in temperature between two stars produce small differences in the amount of energy they radiate.

Accepted Answer

A) True 
 B)False

Question 5

An atom must emit a photon when a(n) ____.

Accepted Answer

A)  electron moves from a lower to a higher energy level 
B)  proton moves from a lower to a higher energy level 
C)  proton moves from a higher to a lower energy level 
D)  electron moves from a higher to a lower energy level 
E)  atom becomes ionized 
A)  electron moves from a lower to a higher energy level 
B)  proton moves from a lower to a higher energy level 
C)  proton moves from a higher to a lower energy level 
D)  electron moves from a higher to a lower energy level 
E)  atom becomes ionized

Question 6

The photons coming from an excited gas create a(n) ____ spectrum.

Accepted Answer

A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization 
A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization

Question 7

An atom can only have orbits of certain sizes, called _______________ orbits.

Accepted Answer

The answer of An atom can only have orbits of...

Question 8

The amount of energy needed to pull an electron completely away from the nucleus is called the Coulomb energy.

Accepted Answer

A) True 
 B)False

Question 9

The _______________ effect changes the observed wavelength of an emitted photon if the source is moving toward or away from the observer.

Accepted Answer

The answer of The _______________ effect changes the observed wavelength...

Question 10

What is binding energy, and what physical effect causes it?

Accepted Answer

Binding energy is the amount of energy n

Question 11

Most of the mass of an atom is ____.

Accepted Answer

A)  in the electron cloud 
B)  spread evenly through the atom 
C)  made up of electrons 
D)  concentrated in the nucleus 
E)  concentrated in a disk around the nucleus 
A)  in the electron cloud 
B)  spread evenly through the atom 
C)  made up of electrons 
D)  concentrated in the nucleus 
E)  concentrated in a disk around the nucleus

Question 12

According to Wien's Law, a(n) ____.

Accepted Answer

A)  hotter object will emit more short wavelength (bluer) radiation 
B)  hotter object will emit more long wavelength (redder) radiation 
C)  cooler object will produce less photons 
D)  cooler object will produce more photons 
E)  object will produce the same number of photons at different temperatures 
A)  hotter object will emit more short wavelength (bluer) radiation 
B)  hotter object will emit more long wavelength (redder) radiation 
C)  cooler object will produce less photons 
D)  cooler object will produce more photons 
E)  object will produce the same number of photons at different temperatures

Question 13

Match between columns
                        Premises: The wavelength of maximum intensity depends on the surface temperature of the star.
The energy output of a surface is proportional to the temperature of the surface.
Each atom absorbs or emits a set of photon wavelengths unique to its element type.
The apparent change in the wavelength of a photon from a source caused by the relative motion of the source and the observer.
An excited atom in which an electron is raised to a higher orbit.

Accepted Answer

The Answer of agitation and collision of atoms and the is...

Question 14

A spectrum that displays a smooth variation in intensity of all wavelengths without any breaks is a(n) ____ spectrum.

Accepted Answer

A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization 
A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization

Question 15

An object that is a perfect absorber and emitter of radiation is called a(n) _______________.

Accepted Answer

blackbody,

Question 16

An absorption spectrum is created when blackbody radiation passes through a cool gas.

Accepted Answer

A) True 
 B)False

Question 17

As a blackbody becomes hotter it will radiate ____.

Accepted Answer

A)  less energy, at a longer wavelength of maximum intensity 
B)  less energy, at a shorter wavelength of maximum intensity 
C)  more energy, at a longer wavelength of maximum intensity 
D)  more energy, at a shorter wavelength of maximum intensity 
E)  more energy, at a constant wavelength of maximum intensity 
A)  less energy, at a longer wavelength of maximum intensity 
B)  less energy, at a shorter wavelength of maximum intensity 
C)  more energy, at a longer wavelength of maximum intensity 
D)  more energy, at a shorter wavelength of maximum intensity 
E)  more energy, at a constant wavelength of maximum intensity

Question 18

A(n) _______________ is an atom that has gained or lost one or more electrons.

Accepted Answer

The answer of A(n) _______________ is an atom that has...

Question 19

If the photons from blackbody radiator radiation pass through a cool gas, a(n) ____ spectrum is produced.

Accepted Answer

A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization 
A)  absorption 
B)  emission 
C)  continuous 
D)  Doppler 
E)  ionization

Question 20

The type of element is determined by the number of ____.

Accepted Answer

A)  protons in the atom 
B)  neutrons in the atom 
C)  electrons in the atom 
D)  electrons that have been removed from the atom 
E)  protons that have been removed from the atom 
A)  protons in the atom 
B)  neutrons in the atom 
C)  electrons in the atom 
D)  electrons that have been removed from the atom 
E)  protons that have been removed from the atom

Exam 7: Atoms and Spectra

Emission lines are produced by ____.

A continuous spectrum is created by a hot ionized gas.

A hot blackbody emits a(n) _______________ spectrum.

Small differences in temperature between two stars produce small differences in the amount of energy they radiate.

An atom must emit a photon when a(n) ____.

The photons coming from an excited gas create a(n) ____ spectrum.

An atom can only have orbits of certain sizes, called _______________ orbits.

The amount of energy needed to pull an electron completely away from the nucleus is called the Coulomb energy.

The _______________ effect changes the observed wavelength of an emitted photon if the source is moving toward or away from the observer.

What is binding energy, and what physical effect causes it?

Most of the mass of an atom is ____.

According to Wien's Law, a(n) ____.

A spectrum that displays a smooth variation in intensity of all wavelengths without any breaks is a(n) ____ spectrum.

An object that is a perfect absorber and emitter of radiation is called a(n) _______________.

An absorption spectrum is created when blackbody radiation passes through a cool gas.

As a blackbody becomes hotter it will radiate ____.

A(n) _______________ is an atom that has gained or lost one or more electrons.

If the photons from blackbody radiator radiation pass through a cool gas, a(n) ____ spectrum is produced.

The type of element is determined by the number of ____.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters