Question 1

The arrangement of permitted orbits is ____.

Accepted Answer

A)  the same for each neutron 
B)  unique for each electron 
C)  the same for all elements 
D)  the same for all molecules 
E)  unique for each element 
A)  the same for each neutron 
B)  unique for each electron 
C)  the same for all elements 
D)  the same for all molecules 
E)  unique for each element E

Question 2

A continuous spectrum is created by a hot ionized gas.

Accepted Answer

A) True 
 B)False  False

Question 3

An object that acts as a blackbody emits photons because ____.

Accepted Answer

A)  thermal energy excites electrons to the ground state 
B)  electrons in the atoms of the object jump to lower energy levels 
C)  electrons in the atoms of the object jump to higher energy levels 
D)  atoms in the object collide, changing the motion of charged particles 
E)  atoms in the object have absorbed photons from an external source 
A)  thermal energy excites electrons to the ground state 
B)  electrons in the atoms of the object jump to lower energy levels 
C)  electrons in the atoms of the object jump to higher energy levels 
D)  atoms in the object collide, changing the motion of charged particles 
E)  atoms in the object have absorbed photons from an external source D

Question 4

The star Betelgeuse appears red; the star Rigel appears blue. What accounts for this difference?

Accepted Answer

A)  Betelgeuse and Rigel have different chemical compositions. 
B)  Betelgeuse is moving away from Earth, Rigel is moving toward Earth. 
C)  Betelgeuse is moving toward Earth, Rigel is moving away from Earth. 
D)  The surface of Betelgeuse is hotter than the surface of Rigel. 
E)  The surface of Betelgeuse is cooler than the surface of Rigel. 
A)  Betelgeuse and Rigel have different chemical compositions. 
B)  Betelgeuse is moving away from Earth, Rigel is moving toward Earth. 
C)  Betelgeuse is moving toward Earth, Rigel is moving away from Earth. 
D)  The surface of Betelgeuse is hotter than the surface of Rigel. 
E)  The surface of Betelgeuse is cooler than the surface of Rigel.

Question 5

What physical situation is necessary to create an absorption spectrum?

Accepted Answer

Blackbody radiation creates a continuous

Question 6

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 7

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 8

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 9

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 10

Photons of light can be absorbed by an atom of an element ____.

Accepted Answer

A)  if they match one of several possible wavelengths that are absorbed by that element 
B)  if they match one of several possible wavelengths that are absorbed by all elements 
C)  if they match the only particular wavelength that can be absorbed by that element 
D)  if they match the only particular wavelength that can be absorbed by all elements 
E)  no matter what wavelength they have 
A)  if they match one of several possible wavelengths that are absorbed by that element 
B)  if they match one of several possible wavelengths that are absorbed by all elements 
C)  if they match the only particular wavelength that can be absorbed by that element 
D)  if they match the only particular wavelength that can be absorbed by all elements 
E)  no matter what wavelength they have

Question 11

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

Accepted Answer

The Answer of Wien's Law and the Doppler effect and is...

Question 12

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 13

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 14

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

Accepted Answer

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

Question 15

Blackbody radiation is caused by an object's ____.

Accepted Answer

A)  chemical structure 
B)  binding energy 
C)  excitation level 
D)  absolute zero 
E)  thermal agitation 
A)  chemical structure 
B)  binding energy 
C)  excitation level 
D)  absolute zero 
E)  thermal agitation

Question 16

The number of protons in the nucleus determines which element it is.

Accepted Answer

A) True 
 B)False

Question 17

Explain how the structure of the atom creates binding energy, and what limits there are on the amount of binding energy an electron can have.

Accepted Answer

The Coulomb force is an attractive force

Question 18

The position of an absorption or emission line is useful in determining the ____.

Accepted Answer

A)  temperature of an object 
B)  distance to an object 
C)  chemical composition of an object 
D)  motion of an object across the observer's line of sight 
E)  motion of an object toward or away from the observer 
A)  temperature of an object 
B)  distance to an object 
C)  chemical composition of an object 
D)  motion of an object across the observer's line of sight 
E)  motion of an object toward or away from the observer

Question 19

A hot blackbody emits a(n) _______________ spectrum.

Accepted Answer

continuous

Question 20

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

Exam 7: Atoms and Spectra

The arrangement of permitted orbits is ____.

A continuous spectrum is created by a hot ionized gas.

An object that acts as a blackbody emits photons because ____.

The star Betelgeuse appears red; the star Rigel appears blue. What accounts for this difference?

What physical situation is necessary to create an absorption spectrum?

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

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

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

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

Photons of light can be absorbed by an atom of an element ____.

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

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

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

Blackbody radiation is caused by an object's ____.

The number of protons in the nucleus determines which element it is.

Explain how the structure of the atom creates binding energy, and what limits there are on the amount of binding energy an electron can have.

The position of an absorption or emission line is useful in determining the ____.

A hot blackbody emits a(n) _______________ spectrum.

Most of the mass of an atom is ____.

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