Question 1

Absolute zero is

Accepted Answer

A)  zero degrees Celsius. 
B)  the temperature at which atoms have no remaining energy from which we can extract heat. 
C)  the temperature at which water freezes. 
D)  both a and c 
E)  none of the above 
A)  zero degrees Celsius. 
B)  the temperature at which atoms have no remaining energy from which we can extract heat. 
C)  the temperature at which water freezes. 
D)  both a and c 
E)  none of the above B

Question 2

Blue stars are emit most of their energy at shorter wavelengths than red stars..

Accepted Answer

A) True 
 B)False  True

Question 3

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

Accepted Answer

A)  50 nm 
B)  500 nm 
C)  300 nm 
D)  1.8*1011 nm 
E)  180 nm 
A)  50 nm 
B)  500 nm 
C)  300 nm 
D)  1.8*1011 nm 
E)  180 nm A

Question 4

The lowest energy level in an atom is

Accepted Answer

A)  the absolute zero temperature. 
B)  the ground state. 
C)  the ionization level. 
D)  responsible for Doppler shifts. 
E)  the energy level from which the Paschen Series of hydrogen originates. 
A)  the absolute zero temperature. 
B)  the ground state. 
C)  the ionization level. 
D)  responsible for Doppler shifts. 
E)  the energy level from which the Paschen Series of hydrogen originates.

Question 5

If light from a star passes from an excited low density gas seen against the dark background of space to your telescope and spectroscope,____ spectrum results.

Accepted Answer

A)  a dark (absorption)line 
B)  a bright (emission)line 
C)  continuous 
A)  a dark (absorption)line 
B)  a bright (emission)line 
C)  continuous

Question 6

If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope,____ spectrum on the continuous spectrum results.

Accepted Answer

A)  a dark (absorption)line 
B)  a bright (emission)line 
C)  continuous 
A)  a dark (absorption)line 
B)  a bright (emission)line 
C)  continuous

Question 7

The two most abundant elements in the sun are

Accepted Answer

A)  nitrogen and oxygen. 
B)  hydrogen and helium. 
C)  sulfur and iron. 
D)  carbon and hydrogen. 
E)  carbon and nitrogen. 
A)  nitrogen and oxygen. 
B)  hydrogen and helium. 
C)  sulfur and iron. 
D)  carbon and hydrogen. 
E)  carbon and nitrogen.

Question 8

An atom that is excited

Accepted Answer

A)  is also ionized. 
B)  is an isotope. 
C)  has had its electron moved to the lowest energy level. 
D)  can emit a photon when the electron moves to a lower energy level. 
E)  can emit a photon when the electron moves to a higher energy level. 
A)  is also ionized. 
B)  is an isotope. 
C)  has had its electron moved to the lowest energy level. 
D)  can emit a photon when the electron moves to a lower energy level. 
E)  can emit a photon when the electron moves to a higher energy level.

Question 9

The nucleus of the hydrogen atom consists of a single neutron.

Accepted Answer

A) True 
 B)False

Question 10

Which one of the hydrogen atoms below is EMITTING light? The electron jumps from the ...

Accepted Answer

A)  second energy level to first (most bound) 
B)  third energy level to fourth 
C)  fourth energy level to fifth 
D)  second energy level to third 
E)  first energy level to second 
A)  second energy level to first (most bound) 
B)  third energy level to fourth 
C)  fourth energy level to fifth 
D)  second energy level to third 
E)  first energy level to second

Question 11

NARRBEGIN: Diagram 07-01
Diagram 7-1   NARREND
-In Diagram 7-1,which of the transitions would absorb a photon with the smallest energy?

Accepted Answer

A)  Transition 1 
B)  Transition 2 
C)  Transition 3 
D)  Transition 4 
E)  Transition 5 
A)  Transition 1 
B)  Transition 2 
C)  Transition 3 
D)  Transition 4 
E)  Transition 5

Question 12

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star.The stars have the same radial velocities away from the earth.

Accepted Answer

A)  larger than. 
B)  the same as 
C)  smaller than 
D)  not enough information to answer 
A)  larger than. 
B)  the same as 
C)  smaller than 
D)  not enough information to answer

Question 13

The sun has a surface temperature of approximately 5,800 K.At what wavelength does the maximum energy radiated by the sun occur?

Accepted Answer

A)  5,800 nm 
B)  300 nm 
C)  174 nm 
D)  520 nm 
E)  3,000 nm 
A)  5,800 nm 
B)  300 nm 
C)  174 nm 
D)  520 nm 
E)  3,000 nm

Question 14

In the diagram below,draw the transition that would emit a photon with the smallest wavelength.

Accepted Answer

a line fro

Question 15

A(n)____ contains two or more atoms that are bound together by sharing electrons with each other.

Accepted Answer

A)  nucleus 
B)  ion 
C)  proton 
D)  electron cloud 
E)  molecule 
A)  nucleus 
B)  ion 
C)  proton 
D)  electron cloud 
E)  molecule

Question 16

The ____________________ of a star can be determined from its color.

Accepted Answer

The answer of The ____________________ of a star can be...

Question 17

When the electrons in an atom are in their lowest possible energy levels,the atom is said to be in its ____________________ state.

Accepted Answer

The answer of When the electrons in an atom are...

Question 18

Two white dwarf stars are the same size,but one has a surface temperature twice as hot as the other.The hotter star will radiate ...

Accepted Answer

A)  half as much energy per second as the cooler star. 
B)  the same amount of energy per second as the cooler star. 
C)  four times as much energy per second as the cooler star. 
D)  sixteen times as much energy per second as the cooler star. 
A)  half as much energy per second as the cooler star. 
B)  the same amount of energy per second as the cooler star. 
C)  four times as much energy per second as the cooler star. 
D)  sixteen times as much energy per second as the cooler star.

Question 19

The number of ____ in the nucleus determines what element the nucleus is.

Accepted Answer

A)  protons 
B)  electrons 
C)  neutrons 
D)  None of these determines the element 
E)  All of these determines the element 
A)  protons 
B)  electrons 
C)  neutrons 
D)  None of these determines the element 
E)  All of these determines the element

Question 20

The constant $\sigma$ in the Stefan-Boltzmann law is equal to   ,so that 5.67*10 - 4 J of energy is radiated each second by one square meter of a star whose temperature is 10,000 $\degree$K.How much energy is radiated each second by one square meter of a star whose temperature is 5,000  $\degree$?

Accepted Answer

A)  5.67*10 - 2 J 
B)  5.67*10 - 3 J 
C)  5.67*10 - 4 J 
D)  1.42*10 - 4 J 
E)  1.42*10 - 1 J 
A)  5.67*10 - 2 J 
B)  5.67*10 - 3 J 
C)  5.67*10 - 4 J 
D)  1.42*10 - 4 J 
E)  1.42*10 - 1 J

Exam 7: Atoms and Spectra

Absolute zero is

Blue stars are emit most of their energy at shorter wavelengths than red stars..

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

The lowest energy level in an atom is

If light from a star passes from an excited low density gas seen against the dark background of space to your telescope and spectroscope,____ spectrum results.

If continuous spectrum light from a star passes through a cool low density gas on its way to your telescope and spectroscope,____ spectrum on the continuous spectrum results.

The two most abundant elements in the sun are

An atom that is excited

The nucleus of the hydrogen atom consists of a single neutron.

Which one of the hydrogen atoms below is EMITTING light? The electron jumps from the ...

NARRBEGIN: Diagram 07-01 Diagram 7-1 NARREND -In Diagram 7-1,which of the transitions would absorb a photon with the smallest energy?

The wavelength of the hydrogen line from level 1 to level 2 in a hot star is ____________ the wavelength of the same line in a cool star.The stars have the same radial velocities away from the earth.

The sun has a surface temperature of approximately 5,800 K.At what wavelength does the maximum energy radiated by the sun occur?

In the diagram below,draw the transition that would emit a photon with the smallest wavelength.

A(n)____ contains two or more atoms that are bound together by sharing electrons with each other.

The ____________________ of a star can be determined from its color.

When the electrons in an atom are in their lowest possible energy levels,the atom is said to be in its ____________________ state.

Two white dwarf stars are the same size,but one has a surface temperature twice as hot as the other.The hotter star will radiate ...

The number of ____ in the nucleus determines what element the nucleus is.

Here and Now

A Users Guide to the Sky

Cycles of the Moon

The Origin of Modern Astronomy

Gravity

Light and Telescopes

The Sun

The Family of Stars

The Interstellar Medium

The Formation and Structure of Stars

Stellar Evolution

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Active Galaxies and Supermassive Black Holes

Modern Cosmology

The Origin of the Solar System

Earth: the Standard of Comparative Planetology

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus,neptune,and the Kuiper Belt

Meteorites,asteroids,and Comets

Astrobiology: Life on Other Worlds

Filters