Question 1

The Hertzsprung-Russell diagram shows astronomers the relationship between

Accepted Answer

A) size and temperature represented by the spectral class. 
B) luminosity and temperature represented by the spectral class. 
C) magnitude and size represented by the spectral class. 
D) spectral class and composition. 
A) size and temperature represented by the spectral class. 
B) luminosity and temperature represented by the spectral class. 
C) magnitude and size represented by the spectral class. 
D) spectral class and composition.

Question 2

The reaction known as the ____________ chain reaction involves the fusion of hydrogen atoms to form helium for our Sun.

Accepted Answer

A) electron-electron 
B) neutron-neutron 
C) proton-proton 
D) electron-proton 
A) electron-electron 
B) neutron-neutron 
C) proton-proton 
D) electron-proton

Question 3

What provides the energy of a nova? What provides the energy of a supernova?

Accepted Answer

Novae develop when mass passes from one

Question 4

In the Big Crunch model, the Universe

Accepted Answer

A) contracts rapidly. 
B) alternately explodes and implodes. 
C) will expand indefinitely. 
D) alternately expands and contracts, like an accordion. 
A) contracts rapidly. 
B) alternately explodes and implodes. 
C) will expand indefinitely. 
D) alternately expands and contracts, like an accordion.

Question 5

The Sun's layer that produces the energy is the

Accepted Answer

A) radiative zone. 
B) convective zone. 
C) sun spot. 
D) solar core. 
A) radiative zone. 
B) convective zone. 
C) sun spot. 
D) solar core.

Question 6

What is the difference between a quasar and a pulsar?

Accepted Answer

A) The most distant objects detectable within the Universe are known as quasars and absorb enormous amounts of nebula. The reflection of energy from rotating neutron stars that arrive on Earth are known as pulsars. 
B) The most distant objects detectable within the Universe are known as quasars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as pulsars. 
C) A pulsar and quasar are the same object but named by different researchers. 
D) The most distant objects detectable within the Universe are known as pulsars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as quasars. 
A) The most distant objects detectable within the Universe are known as quasars and absorb enormous amounts of nebula. The reflection of energy from rotating neutron stars that arrive on Earth are known as pulsars. 
B) The most distant objects detectable within the Universe are known as quasars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as pulsars. 
C) A pulsar and quasar are the same object but named by different researchers. 
D) The most distant objects detectable within the Universe are known as pulsars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as quasars.

Question 7

An astronomer classifies nebulae that have distinct geometry by dividing the nebulae into

Accepted Answer

A) two main types, as either absorption nebulae or reflection nebulae. 
B) two main types based on their predominate radiation characteristics as either emission nebulae or absorption nebulae. 
C) two main types based on their predominate radiation characteristics as either emission nebulae or reflection nebulae. 
D) three main types based on their predominate radiation characteristics as either emission, absorption, or reflection nebulae. 
A) two main types, as either absorption nebulae or reflection nebulae. 
B) two main types based on their predominate radiation characteristics as either emission nebulae or absorption nebulae. 
C) two main types based on their predominate radiation characteristics as either emission nebulae or reflection nebulae. 
D) three main types based on their predominate radiation characteristics as either emission, absorption, or reflection nebulae.

Question 8

What are the differences between black-, white-, and red-dwarf stars in terms of their size, mass, temperature, formation mechanism, and life cycle stage?

Accepted Answer

Astronomers have found numerous examples

Question 9

Is it possible for a planet to safely orbit a black hole?

Accepted Answer

A) No. 
B) Beyond the event horizon, planets can orbit a black hole just as they do other celestial bodies. 
C) Within the event horizon, planets can orbit a black hole just as they do other celestial bodies. 
D) Only if the planet orbiting the black hole has a mass greater than a supergiant star. 
A) No. 
B) Beyond the event horizon, planets can orbit a black hole just as they do other celestial bodies. 
C) Within the event horizon, planets can orbit a black hole just as they do other celestial bodies. 
D) Only if the planet orbiting the black hole has a mass greater than a supergiant star.

Question 10

Edwin Hubble classified galaxies into four basic types based on their shape. Those types are

Accepted Answer

A) spiral, barred spiral, elliptical, and irregular. 
B) circular, barred spiral, elliptical, and irregular. 
C) spiral, banned spiral, spherical, and irregular. 
D) spiral, banned spiral, spherical, and irregular 
A) spiral, barred spiral, elliptical, and irregular. 
B) circular, barred spiral, elliptical, and irregular. 
C) spiral, banned spiral, spherical, and irregular. 
D) spiral, banned spiral, spherical, and irregular

Question 11

A square meter at the top of Earth's atmosphere, aligned perpendicular to the Sun's rays at a distance of 1 AU from the Sun, receives 1,362 watts. Researchers refer to this number, 1,362 watts/m², as the ____________ constant because it has varied by less than 0.2% over the last 400 years.

Accepted Answer

A) lithium 
B) solar 
C) gravity 
D) fission 
A) lithium 
B) solar 
C) gravity 
D) fission

Question 12

A ____________ dwarf is in the same size range as a white dwarf but is much cooler in temperature.

Accepted Answer

A) red 
B) green 
C) black 
D) blue 
A) red 
B) green 
C) black 
D) blue

Question 13

What objects do you encounter in your daily life that provide evidence that our Sun is not a first-generation star; meaning that it was not one of the first stars that formed after the Universe came into existence? Explain your answer.

Accepted Answer

By studying stellar spectra, astronomers

Question 14

A supermassive black hole is

Accepted Answer

A) a nebula. 
B) created during galaxy formation and contains the mass of hundreds of stars. 
C) a product of galaxy formation and contains the mass of hundreds of stars within the volume of a single star. 
D) a product of galaxy formation and contains the mass of millions of stars within the volume of a single star or less. 
A) a nebula. 
B) created during galaxy formation and contains the mass of hundreds of stars. 
C) a product of galaxy formation and contains the mass of hundreds of stars within the volume of a single star. 
D) a product of galaxy formation and contains the mass of millions of stars within the volume of a single star or less.

Question 15

Outbursts of glowing gas and plasma emerging from the Sun's surface, following the magnetic field lines back to the surface, look like particularly huge arcs of plasma and are known as

Accepted Answer

A) solar bursts. 
B) solar prominence. 
C) hotspots. 
D) solar flares. 
A) solar bursts. 
B) solar prominence. 
C) hotspots. 
D) solar flares.

Question 16

The property of a star that is most important in determining if it will end its life cycle as a white dwarf, a neutron star, or a black hole is its

Accepted Answer

A) temperature. 
B) composition. 
C) mass. 
D) location. 
A) temperature. 
B) composition. 
C) mass. 
D) location.

Question 17

Our Universe is a ____________-dimensional mesh composed of stringlike filaments and screenlike walls, whose long dimensions are on the order of ____________ light-years.

Accepted Answer

A) three; 1 to 10 
B) two; 30 to 300 
C) two; 3 to 30 
D) three; 30 to 300 
A) three; 1 to 10 
B) two; 30 to 300 
C) two; 3 to 30 
D) three; 30 to 300

Question 18

Which type of stars appear at the bottom of the Hertzsprung-Russell diagram shown below?

Accepted Answer

A) white dwarfs 
B) main sequence 
C) supergiants 
D) red giants 
A) white dwarfs 
B) main sequence 
C) supergiants 
D) red giants

Question 19

What are the two most abundant elements that make up the composition of the Sun?

Accepted Answer

A) lithium and magnesium 
B) iron and steel 
C) nitrogen and oxygen 
D) hydrogen and helium 
A) lithium and magnesium 
B) iron and steel 
C) nitrogen and oxygen 
D) hydrogen and helium

Question 20

What important forces balance each other within a star as it reaches its equilibrium condition?

Accepted Answer

A) inward pull of gravity and outward pressure 
B) outward pressure and stabilization 
C) outward pressure and absorption 
D) inward pull of gravity and balance 
A) inward pull of gravity and outward pressure 
B) outward pressure and stabilization 
C) outward pressure and absorption 
D) inward pull of gravity and balance

Exam 23: The Sun, Stars, and Deep Space

The Hertzsprung-Russell diagram shows astronomers the relationship between

The reaction known as the ____________ chain reaction involves the fusion of hydrogen atoms to form helium for our Sun.

What provides the energy of a nova? What provides the energy of a supernova?

In the Big Crunch model, the Universe

The Sun's layer that produces the energy is the

What is the difference between a quasar and a pulsar?

An astronomer classifies nebulae that have distinct geometry by dividing the nebulae into

What are the differences between black-, white-, and red-dwarf stars in terms of their size, mass, temperature, formation mechanism, and life cycle stage?

Is it possible for a planet to safely orbit a black hole?

Edwin Hubble classified galaxies into four basic types based on their shape. Those types are

A square meter at the top of Earth's atmosphere, aligned perpendicular to the Sun's rays at a distance of 1 AU from the Sun, receives 1,362 watts. Researchers refer to this number, 1,362 watts/m², as the ____________ constant because it has varied by less than 0.2% over the last 400 years.

A ____________ dwarf is in the same size range as a white dwarf but is much cooler in temperature.

What objects do you encounter in your daily life that provide evidence that our Sun is not a first-generation star; meaning that it was not one of the first stars that formed after the Universe came into existence? Explain your answer.

A supermassive black hole is

Outbursts of glowing gas and plasma emerging from the Sun's surface, following the magnetic field lines back to the surface, look like particularly huge arcs of plasma and are known as

The property of a star that is most important in determining if it will end its life cycle as a white dwarf, a neutron star, or a black hole is its

Our Universe is a ____________-dimensional mesh composed of stringlike filaments and screenlike walls, whose long dimensions are on the order of ____________ light-years.

Which type of stars appear at the bottom of the Hertzsprung-Russell diagram shown below?

What are the two most abundant elements that make up the composition of the Sun?

What important forces balance each other within a star as it reaches its equilibrium condition?

The Earth in Context

The Way the Earth Works: Plate Tectonics

Patterns in Nature: Minerals

Up From the Inferno: Magma and Igneous Rocks

A Surface Veneer: Sediments and Sedimentary Rocks

A Process of Change: Metamorphism and the Rock Cycle

Crags, Cracks, and Crumples: Crustal Deformation and Mountain Building

A Violent Pulse: Earthquakes

Deep Time: How Old Is Old

A Biography of Earth

Riches in Rock: Energy and Mineral Resources

Shaping the Earths Surface: Landscapes, the Hydrologic Cycle, and Mass Wasting

Freshwater: Streams, Lakes, and Groundwater

Extreme Realms: Desert and Glacial Landscapes

Ocean Waters: the Blue of the Blue Marble

Marine Geology: the Study of Ocean Basins and Coasts

The Air We Breathe: Introducing Earths Atmosphere

Winds of the World: the Earths Major Weather Systems

Thunderstorms, Tornadoes, and Local Weather Systems

Climate and Climate Change

Our Solar System and Beyond

Our Neighborhood in Space

Prelude: Welcome to Earth Science

Filters

Our Universe is a -dimensional mesh composed of stringlike filaments and screenlike walls, whose long dimensions are on the order of light-years.