Question 1

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

Accepted Answer

The Doppler effect can only determine th

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

A spectrum that displays no energy except at very specific wavelengths where intense radiation is observed 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 4

A star like the Sun emits 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 5

Atoms that have the same number of protons but a different number of neutrons are called ____.

Accepted Answer

A)  ions 
B)  elements 
C)  isotopes 
D)  molecules 
E)  nucleons 
A)  ions 
B)  elements 
C)  isotopes 
D)  molecules 
E)  nucleons

Question 6

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 7

During the first year of its operation, only 20% of the projects scheduled for the Hubble Space Telescope involved taking images and pictures of celestial objects. The remaining 80% of the telescope's time was devoted to observing the spectrum of celestial objects. 
Why do astronomers place such a high emphasis on looking at the spectrum of a celestial object rather than an image? Explain.

Accepted Answer

Some important information about the sha

Question 8

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

Accepted Answer

Binding energy is the amount of energy n

Question 9

What process in an isolated atom will make it absorb a photon?

Accepted Answer

An electron will move from one energy le

Question 10

The formula   $E = \sigma T ^ { 4 }$ expresses the relationship between Kelvin temperature and the amount of radiated energy. If a star is three times the temperature of the Sun, how many times more intense is the energy radiated from an equal-sized area of its surface? (Answer with a number only.

Accepted Answer

The answer of The formula   \(E = \sigma T...

Question 11

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 12

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

Accepted Answer

The answer of The _______________ is the amount of energy...

Question 13

A spectrum that displays a smooth variation in intensity over a range of wavelengths with breaks where no energy is observed at specific wavelengths 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 14

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

Accepted Answer

The answer of An object moving away from the observer...

Question 15

The lowest permitted energy level of an atom is called the neutral state.

Accepted Answer

A) True 
 B)False

Question 16

Absorption 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 17

The NASA Curiosity rover exploring Mars carries a number of scientific instruments, including a spectrograph (a device for recording a spectrum), and a high intensity laser. On several occasions, Curiosity has fired its laser at the surface of a rock sample, while observing the process with a spectroscope. The laser is intense enough to vaporize the atoms on the surface of the sample into a hot, excited gas. 
Why is this a useful technique for the rover to employ?

Accepted Answer

The vaporized material will contain the

Question 18

An atom that has lost or gained one or more electrons is called a(n) ____.

Accepted Answer

A)  ion 
B)  isotope 
C)  nucleus 
D)  molecule 
E)  electron 
A)  ion 
B)  isotope 
C)  nucleus 
D)  molecule 
E)  electron

Question 19

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 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

What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?

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

A spectrum that displays no energy except at very specific wavelengths where intense radiation is observed is a(n) ____ spectrum.

A star like the Sun emits a(n) ____ spectrum.

Atoms that have the same number of protons but a different number of neutrons are called ____.

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

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

What process in an isolated atom will make it absorb a photon?

As a blackbody becomes hotter it will radiate ____.

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

A spectrum that displays a smooth variation in intensity over a range of wavelengths with breaks where no energy is observed at specific wavelengths is a(n) ____ spectrum.

An object moving away from the observer will exhibit a(n) _______________ shift due to the Doppler effect.

The lowest permitted energy level of an atom is called the neutral state.

Absorption lines are produced by ____.

An atom that has lost or gained one or more electrons is called a(n) ____.

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

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

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