Test Bank Introductory Statistics 10th Edition
Verified Questions, Answer Key, Chapter 1–15
Exam Prep Guide, and Complete Study Resource
Farthest Galaxies - ANSWERSModern telescopes see galaxies up to 10 billion light-years.
Solar System Size - ANSWERSOrbits cover area of a typical college campus.
Element Formation - ANSWERSElements formed by nuclear fusion in stars.
Nuclear Fusion - ANSWERSCombining lighter nuclei to form heavier nuclei.
Cosmic Calendar - ANSWERSBig Bang on January 1; Earth formed in September.
Light Travel Time - ANSWERSLight takes 8.4 minutes from Sun to Earth.
Galaxy Recession Velocities - ANSWERSGalaxy B is 6 times farther than Galaxy A.
Youngest Galaxies - ANSWERSFurthest galaxies appear youngest after Big Bang.
New Horizons Spacecraft - ANSWERSImages from Pluto took 4.6 hours to arrive.
Star Material Recycling - ANSWERSNew stars form from ejected gas of previous stars.
Sun Composition - ANSWERSSun mainly consists of hydrogen and helium.
,Dark Matter Evidence - ANSWERSUnexpected galaxy rotation velocities indicate dark matter.
Universe Definition - ANSWERSAll material, space, and energy that exists.
Orientation at Poles - ANSWERSSouth Pole person appears upside down to North Pole.
Universe Expansion - ANSWERSAcceleration suggests presence of dark energy.
Hydrogen Formation - ANSWERSHydrogen formed during the Big Bang.
Milky Way Galaxy - ANSWERSDisk-shaped, 50,000 light-years radius, 100 billion stars.
Observable Universe Galaxies - ANSWERSEstimated to contain billions of galaxies.
Number of stars in our galaxy - ANSWERSRoughly (within a factor of 10) the same as the
number of stars in our galaxy.
Number of stars compared to galaxies - ANSWERSRoughly a thousand times more than the
number of stars in our galaxy.
Naked eye visibility - ANSWERSAbout as many as the number of stars we see in the sky with our
naked eyes.
Grains of sand comparison - ANSWERSAbout as many as the number of grains of sand on all the
beaches on Earth.
Concept of infinity - ANSWERSInfinity.
,Human civilization on cosmic calendar - ANSWERSAbout 10 seconds.
Dinosaurs extinction on cosmic calendar - ANSWERSIn the last 2 days of the year.
Discovery of solar system - ANSWERS1 second ago.
Speed at Earth's equator - ANSWERSApproximately 1,700 km/hr.
Solar system orbit duration - ANSWERS230 million years.
Heavier elements formation - ANSWERS2% when the universe was 1/3 its current age.
Speed comparison of celestial bodies - ANSWERSEarth's speed of rotation on its axis, typical
speeds of stars in the local solar neighborhood relative to us, Earth's speed of revolution about
the Sun, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds
of very distant galaxies relative to us.
Mass distribution in Milky Way - ANSWERSIn the halo (above/below the disk).
Determining mass distribution - ANSWERSStudying the rotation of the galaxy.
Galaxies moving away - ANSWERSMore space expands between us and the distant galaxies.
Hubble's discovery - ANSWERSAll galaxies outside the Local Group are moving away from us,
and the farther away they are, the faster they're going.
, Raisin cake analogy - ANSWERSMore distant raisins would be moving away from you faster.
Seconds in one year - ANSWERSAbout 30 million (30,000,000, or 3 × 10^7).
Older universe conclusion - ANSWERSAlan would say that the universe is OLDER.
Sun formation - ANSWERSThe Sun formed long after our galaxy formed.
Dominant energy in universe - ANSWERSDark Energy.
Distance of Jupiter from the Sun - ANSWERS778 million km (7.78 × 10^8 km).
Light travel time to Mars - ANSWERSAbout 12.7 minutes.
Distance of 1 light-year - ANSWERSThe distance light travels in one year.
Light-year - ANSWERSDistance light travels in one year, about 9.46 trillion km.
Galactic Center - ANSWERSThe rotational center of a galaxy, often containing a supermassive
black hole.
Proxima Centauri - ANSWERSNearest stellar neighbor to the Sun, 4.2 light-years away.
Speed of Light - ANSWERS300,000 km/s, the fastest speed in the universe.
Observable Universe - ANSWERSRegion of the universe we can see, estimated at 14 billion years
old.
Verified Questions, Answer Key, Chapter 1–15
Exam Prep Guide, and Complete Study Resource
Farthest Galaxies - ANSWERSModern telescopes see galaxies up to 10 billion light-years.
Solar System Size - ANSWERSOrbits cover area of a typical college campus.
Element Formation - ANSWERSElements formed by nuclear fusion in stars.
Nuclear Fusion - ANSWERSCombining lighter nuclei to form heavier nuclei.
Cosmic Calendar - ANSWERSBig Bang on January 1; Earth formed in September.
Light Travel Time - ANSWERSLight takes 8.4 minutes from Sun to Earth.
Galaxy Recession Velocities - ANSWERSGalaxy B is 6 times farther than Galaxy A.
Youngest Galaxies - ANSWERSFurthest galaxies appear youngest after Big Bang.
New Horizons Spacecraft - ANSWERSImages from Pluto took 4.6 hours to arrive.
Star Material Recycling - ANSWERSNew stars form from ejected gas of previous stars.
Sun Composition - ANSWERSSun mainly consists of hydrogen and helium.
,Dark Matter Evidence - ANSWERSUnexpected galaxy rotation velocities indicate dark matter.
Universe Definition - ANSWERSAll material, space, and energy that exists.
Orientation at Poles - ANSWERSSouth Pole person appears upside down to North Pole.
Universe Expansion - ANSWERSAcceleration suggests presence of dark energy.
Hydrogen Formation - ANSWERSHydrogen formed during the Big Bang.
Milky Way Galaxy - ANSWERSDisk-shaped, 50,000 light-years radius, 100 billion stars.
Observable Universe Galaxies - ANSWERSEstimated to contain billions of galaxies.
Number of stars in our galaxy - ANSWERSRoughly (within a factor of 10) the same as the
number of stars in our galaxy.
Number of stars compared to galaxies - ANSWERSRoughly a thousand times more than the
number of stars in our galaxy.
Naked eye visibility - ANSWERSAbout as many as the number of stars we see in the sky with our
naked eyes.
Grains of sand comparison - ANSWERSAbout as many as the number of grains of sand on all the
beaches on Earth.
Concept of infinity - ANSWERSInfinity.
,Human civilization on cosmic calendar - ANSWERSAbout 10 seconds.
Dinosaurs extinction on cosmic calendar - ANSWERSIn the last 2 days of the year.
Discovery of solar system - ANSWERS1 second ago.
Speed at Earth's equator - ANSWERSApproximately 1,700 km/hr.
Solar system orbit duration - ANSWERS230 million years.
Heavier elements formation - ANSWERS2% when the universe was 1/3 its current age.
Speed comparison of celestial bodies - ANSWERSEarth's speed of rotation on its axis, typical
speeds of stars in the local solar neighborhood relative to us, Earth's speed of revolution about
the Sun, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds
of very distant galaxies relative to us.
Mass distribution in Milky Way - ANSWERSIn the halo (above/below the disk).
Determining mass distribution - ANSWERSStudying the rotation of the galaxy.
Galaxies moving away - ANSWERSMore space expands between us and the distant galaxies.
Hubble's discovery - ANSWERSAll galaxies outside the Local Group are moving away from us,
and the farther away they are, the faster they're going.
, Raisin cake analogy - ANSWERSMore distant raisins would be moving away from you faster.
Seconds in one year - ANSWERSAbout 30 million (30,000,000, or 3 × 10^7).
Older universe conclusion - ANSWERSAlan would say that the universe is OLDER.
Sun formation - ANSWERSThe Sun formed long after our galaxy formed.
Dominant energy in universe - ANSWERSDark Energy.
Distance of Jupiter from the Sun - ANSWERS778 million km (7.78 × 10^8 km).
Light travel time to Mars - ANSWERSAbout 12.7 minutes.
Distance of 1 light-year - ANSWERSThe distance light travels in one year.
Light-year - ANSWERSDistance light travels in one year, about 9.46 trillion km.
Galactic Center - ANSWERSThe rotational center of a galaxy, often containing a supermassive
black hole.
Proxima Centauri - ANSWERSNearest stellar neighbor to the Sun, 4.2 light-years away.
Speed of Light - ANSWERS300,000 km/s, the fastest speed in the universe.
Observable Universe - ANSWERSRegion of the universe we can see, estimated at 14 billion years
old.
