Deck 26: The Solar System

Question 1

A spinning cloud of interstellar gas tends to

A)disperse.
B)flatten.
C)turn into a sphere.
D)condense.

Answer 1

B

Question 2

What is the evidence that the Sun is a relatively new star in the universe?

Answer 2

Spectroscopic investigations show that the Sun contains traces of heavy elements that couldn't have been manufactured in its interior. The heavy elements are evidence that the Sun is formed of material that must have composed older stars that have since exploded. The very oldest stars show little or no heavy elements. Newer stars were formed from the ashes of older stars.

Question 3

Consider a huge rotating cloud of particles in space that gravitate together to form an increasingly dense ball. As the cloud shrinks in size, it

A)rotates slower.
B)rotates faster.
C)rotates at the same rate.

Answer 3

B

Question 4

The solar wind blows in a direction

A)away from the Sun.
B)toward the Sun.
C)coplanar to the plane of the solar system
D)primarily along the Sun's polar axis

Question 5

Evidence of the solar wind on Earth is the

A)meteor showers in the upper atmosphere.
B)solar sunspots.
C)preponderance of hurricanes at lower latitudes.
D)higher ocean tides in winter.
E)Aurora Borealis.

Question 6

Nebular theory pertains to the formation of

A)the solar system.
B)a galaxy.
C)the asteroid belt.
D)the Earth.

Question 7

A cloud of interstellar gas is held together by

A)the gravitational force.
B)infrared radiation.
C)electromagnetism.
D)All of the above.

Question 8

Each second, the burning Sun's mass

A)decreases.
B)increases.
C)remains unchanged.

Question 9

About how deep is the photosphere?

A)300 meters
B)500 meters
C)300 km
D)500 km

Question 10

The best evidence that the Sun is a newcomer in the universe is

A)the existence of heavy elements in its composition.
B)its relatively slow rate of spin.
C)its high temperature as revealed by its color.
D)its position in the galaxy.
E)its very existence in spite of its high burning rate.

Question 11

The ecliptic

A)occurs during a solar or lunar eclipse.
B)is the average distance between the Sun and Earth.
C)is the plane of Earth's orbit.
D)refers to the gases from which our solar system formed.

Question 12

How long does it take for Earth to revolve around the Sun?

A)one day
B)one week
C)one month
D)one year

Question 13

In what region of the Sun are most of X-rays generated?

A)The inner core
B)The photosphere
C)The chronosphere
D)The corona

Question 14

The age of the Sun is about

A)7000 years.
B)5.5 million years.
C)5.5 billion years.
D)5.5 trillion years.
E)more than 5.5 trillion years

Question 15

The Sun tends to bloat outward by nuclear fusion, and contract due to

A)gravitation.
B)nuclear fission.
C)mass decrease.
D)its relatively slow spin.
E)reduced gaseous pressures.

Question 16

Distinguish between a star and a planet. Which glows, or do they both glow?

Question 17

When a contracting hot ball of stellar gas spins into a disk shape, it cools faster due to

A)increased convection currents.
B)increased radiation transfer.
C)decreased insulation.
D)increased surface area to volume.
E)eddy currents.

Question 18

What aspect of the Sun's behavior wraps and distorts the solar magnetic field?

A)The differential spin between the equatorial and polar regions
B)Sunspot activity due to differential heat dispersion
C)Plasma fluxes within the core
D)The cycle of the reversal of the magnetic poles

Question 19

In what region of the Sun is solar energy generated?

A)The outer surface
B)The inner surface
C)The mid-interior
D)The inner core.

Question 20

With daytime temperatures that can reach 430°C, why is nighttime on Mercury so cold?

A)Because the year is so short, there isn't enough time for the heat to build up in the equatorial regions.
B)With very little atmosphere, heat is quickly lost back into space.
C)The weak gravitational field doesn't retain the daytime's heat.
D)The solar winds quickly dissipate all heat on the planet's dark side.

Question 21

The predominant gas in the atmosphere of Mars is

A)oxygen.
B)nitrogen.
C)water vapor.
D)carbon dioxide.
E)methane.

Question 22

What is the cause of Jupiter's slight flattening, which results in an equatorial diameter 6% greater than its polar diameter?

A)Its rapid spin cycle
B)Its massive gravitational pull
C)Nuclear fission within its core
D)Its frequent reversal of its magnetic poles

Question 23

Why is Jupiter the largest planet in the solar system?

A)Because that's just the way it happened.
B)Being the oldest planetary core, it had more time than the other planets to accumulate enough gas around itself before solar winds blew interplanetary dust away.
C)Due to a massive collision with another protoplanet
D)Because of its distance from the Sun, the gravitational attraction between it and the Sun is perfectly balanced so as to create a density that results in the largest size of any planet.

Question 24

In what region of Mars is microscopic life most likely to exist?

A)At the poles, where ice caps may harbor microorganisms.
B)At the equator, where temperatures are most moderate.
C)Deep within the planet's core.
D)Beneath the planet's surface, where melting water may pool.

Question 25

No greenhouse effect occurs on Mercury because of no

A)daily spin.
B)atmosphere.
C)relatively cool regions.
D)plant life.
E)terrestrial radiation.

Question 26

What is the cause of Jupiter's extremely high-energy radiation belts?

A)An enormous magnetic field that captures high energy particles.
B)The capture of a high number of metallic asteroids.
C)Tidal forces due to the interaction between Jupiter and its moons.
D)The remnants of a massive collision between Jupiter and another large body.

Question 27

What constitutes over half of Jupiter's volume?

A)Oceans of liquid hydrogen
B)Oceans of liquid methane
C)Its rocky solid core
D)The massive Mons Majora Range

Question 28

Pretend you are on a morning time mission on the surface of Venus. When looking out the spacepod window you are likely to see

A)the Sun rising in the West.
B)the Sun rising in the East.
C)fierce windstorms everywhere you look.
D)thick and still smog-like cloud cover.

Question 29

of Jupiter's atmosphere?

A)Hydrogen
B)Helium
C)Methane
D)Ammonia

Question 30

Venus and Earth started out with roughly the same amount of water. While Earth still has water in abundance, all of Venus' was lost. Where did it go?

A)It chemically combined with CO_2. to form H₂CO₃.
B)Ultraviolet rays split the hydrogen from the oxygen components, and the hydrogen escaped into space.
C)It all evaporated into space due to the intense daytime heat of 470°C.
D)Scientists are still trying to determine this.

Question 31

How do the wind speeds of the Martian atmosphere compare with those of Earth?

A)About the same as Earth's
B)About one tenth of Earth's
C)About 50% of Earth's
D)About ten times more than Earth's

Question 32

How much greater is the atmospheric pressure of Jupiter than Earth's? More than

A)ten times.
B)one hundred times.
C)ten thousand times.
D)a million times.

Question 33

The predominant gas in the atmosphere of Earth is

A)oxygen.
B)nitrogen.
C)water vapor.
D)carbon dioxide.
E)methane.

Question 34

Which body in the solar system has the highest level of volcanic activity?

A)Jupiter
B)Earth
C)Mars
D)Io

Question 35

The percentage of the Earth's surface covered by ocean is about

A)50%.
B)60%.
C)70%.
D)80%.
E)85%.

Question 36

Temperature differences between nighttime and daytime on Earth are relatively small due to

A)polar regions absorbing most solar energy.
B)Earth being 70% water.
C)Earth's relatively high daily spin rate and shortness of nighttime.
D)seasonal fluctuations and Earths magnetic field.

Question 37

The predominant gas in the atmosphere of Venus is

A)oxygen.
B)nitrogen.
C)water vapor.
D)carbon dioxide.
E)methane.

Question 38

Why is Mars' greenhouse effect negligible compared to that of Earth's?

A)Its mass is only one-ninth of Earth's.
B)Greenhouse gas emissions were greatly curtailed according to the International Mars Greenhouse Gas Reduction Treaty of 2003.
C)The Martian atmosphere is much thinner and retains little heat.
D)Martian carbon dioxide contains a rare isotope with little ability to trap heat.

Question 39

The carbon dioxide cycle is important to Earth because it

A)helps sustain the planet's plant base.
B)has been recognized by the Nobel Prize award committee.
C)and the oceans are critical in moderating and regulating the Earth's temperatures.
D)prevents the gradual buildup of oxygen, which would eventually lead to a combustible atmosphere.

Question 40

The planet with a mass most like Earth's is

A)Mercury.
B)Venus.
C)Mars.
D)Saturn.
E)Neptune.

Question 41

The planet that is most tipped to its orbital plane is

A)Mars.
B)Jupiter.
C)Saturn.
D)Uranus.
E)Neptune.

Question 42

Compared to the density of water, the density of Saturn is

A)less.
B)more.
C)about the same.

Question 43

Is the rate of Earth's rotation increasing or decreasing?

A)It is increasing
B)It is decreasing
C)It is remaining relatively steady.
D)It is increasing and decreasing in cyclic fashion.

Question 44

What aspect of Titan may hold clues as to what Earth was like before life arose here?

A)Its intense volcanic activity
B)Its expansive liquid oceans
C)The rate of radioactive decay of its inner core
D)An intriguing soup of organic molecules

Question 45

The materials that compose most of Titan are completely different than those that compose Earth. Therefore, what were scientist surprised to see from space-probe images in a 2005 landing?

A)Some indications that an ancient civilization may have inhabited Titan approximately 500,000 years ago
B)A landscape similar to Earth's
C)An utterly alien landscape, unlike anything seen on Earth
D)The image of a man's face on an equatorial mountain range.

Question 46

The parts of Saturn's rings with the greatest rotational speed are the

A)inner parts.
B)outer parts.
C)Neither, for all parts of Saturn's rings rotate equally.

Question 47

What is the likely cause of the 98° tilt of Uranus's axis?

A)A collision with a large body early in the solar system's evolution
B)Distorted magnetic poles due to its large molten iron core
C)Fluid wave dynamics due to its large molten core
D)Neptune's effect on Uranus' gravitational field

Question 48

On which body (other than Earth)is life in our solar system most likely to be found?

A)Mars
B)Venus
C)Europa
D)Scientific evidence suggests that life elsewhere in our solar system is not possible.

Question 49

If one had the opportunity to walk on Triton, Neptune's largest moon, what would you observe the geysers to be spewing?

A)Liquid nitrogen
B)Liquid hydrogen
C)Liquid oxygen
D)Liquid water

Question 50

Why should one not stare at the Sun during a partial eclipse?

A)Because, whether there is an eclipse or not, the Sun's intense radiation can easily damage our eyes.
B)Because the eclipse event itself creates a lensing effect, which greatly magnifies and intensifies the Suns rays.
C)Because Sunspots, which are excited by the eclipse event, can easily erupt during the eclipse.
D)Because Ultraviolet radiation is intensified during the event.
E)Because coronas and corneas are always a bad mix.

Question 51

What makes Europa the most likely place extraterrestrial life will be found in our solar system?

A)It has an ocean of liquid water, which is warmed by tidal force interaction with Jupiter, and may house underwater volcanic thermal vents.
B)It has an ocean of liquid water, and there is increasing evidence of phytoplankton activity, particularly as shown by ongoing spectral analysis.
C)It has a hydrogen ocean and moderate levels of oxygen in its atmosphere, which is gradually producing water through frequent lighting strikes.
D)Actually, Io is the most likely place to find life, due to its high level of volcanic activity.

Question 52

Compared to your weight on Earth, your weight on Jupiter would be about

A)2 times.
B)3 times.
C)100 times.
D)300 times.
E)3000 times.

Question 53

Why is the Moon still visible during a full lunar eclipse?

A)Earth's atmosphere acts as a lens that refracts light into the shadowed region.
B)There is a minor component of phosphorescent minerals distributed fairly evenly on the lunar surface.
C)The Moon's thin atmosphere acts as a mirror, reflecting light being cast from neighboring stars.
D)Background microwave radiation becomes excited during the lunar eclipse, and shifts towards visual light, which then slightly illuminates the eclipsed moon.

Question 54

Where did Saturn's rings likely come from?

A)Either a moon that never formed, or a moon destroyed by tidal forces
B)The decay of radioactive particles in the outer fringes of Saturn's upper atmosphere
C)Volcanic activity on its surface ejecting matter into space
D)The gravitational capture of micro-asteroids

Question 55

Which explanation best describes why Earth observers always see the same face of the moon?

A)The Moon's rate of spin matches the rate at which the Moon revolves around Earth.
B)The Moon does not rotate as it circles Earth.
C)We tend only to observe the Moon at night, not during the day.
D)Earth and Moon are partially gravity locked.

Question 56

Saturn's rings are composed of?

A)chunks of ice and rock.
B)methane gas.
C)hydrogen.
D)old satellites and other space junk lost from Earth's orbit and other space missions.

Question 57

Like Jupiter and Saturn, Neptune emits about 2.5 times as much heat energy as it receives from the Sun, although calculations show it should have already lost all of its original heat. What is the most likely explanation?

A)Unlike Uranus, it is still contracting.
B)Radioactive decay has kicked into overdrive, with runaway reactions taking place.
C)The basis for these calculations is currently being questioned by a new generation of scientists.
D)There are gravitational anomalies taking place, which may hold some clue as to where the heat may be coming from.
E)Uranus' gravity is creating a 'slingshot' effect, catapulting solar winds into Neptune's atmosphere in the form of as of yet undetected radiation.

Question 58

The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis once per

A)24 hours also.
B)half month.
C)month.
D)year.
E)none of these

Question 59

Neptune was discovered by irregularities in the orbit of

A)Jupiter.
B)Saturn.
C)Uranus.
D)Pluto.
E)Earth.

Question 60

The core of the Moon is

A)solid.
B)liquid.
C)gaseous.
D)Not enough information is known for an answer.

Question 61

Why is the Kuiper belt considered to be a zone of failed planet formation?

A)The dwarf planets found therein have yet to fully accrete all of the material in their orbital paths.
B)There is simply not enough material within the dwarf planet's orbital paths for any of them to ever add up to full planetary status.
C)Because none of the dwarf planets are massive enough to maintain an atmosphere.
D)Both A and B are reasonable.

Question 62

When the Moon assumes its characteristic thin crescent shape, the position of the Sun is

A)almost directly behind the Earth, so Earth is between the Sun and the Moon.
B)almost directly in back of the Moon.
C)at right angles to the line between the Moon and Earth.

Question 63

Distinguish between a solar eclipse and a lunar eclipse, and the reasons for each.

Question 64

Between which planets is the asteroid belt found?

A)Between Mars and Jupiter
B)Between Earth and Mars
C)Between Earth and Venus
D)Between Jupiter and Neptune

Question 65

When we see a half-moon, the position of the Sun is

A)almost directly behind the Moon.
B)almost directly behind the Earth.
C)at right angles to a line from Earth to the Moon.
D)about 45° from a line from Earth to the Moon.

Question 66

About how many tons of meteorites strike the Earth on a daily basis?

A)20 tons
B)200 tons
C)2,000 tons
D)20,000 tons

Question 67

Most meteors seen as shooting stars are about the size of

A)grains of sand.
B)baseballs.
C)small buildings.
D)very large buildings.
E)small continents.

Question 68

A small rock in interplanetary space is called a

A)meteor.
B)meteoroid.
C)meteorite.

Question 69

The gravity lock of the Moon to Earth is similar to the action of a

A)tidal wave.
B)giant pendulum.
C)master key.
D)magnetic compass.
E)spinning top.

Question 70

Asteroids orbit the

A)Sun.
B)Earth.
C)Moon.
D)all of these
E)none of these

Question 71

At about what frequency is Earth struck by a meteorite large enough (about 10 km in diameter)to cause mass extinctions?

A)About every 1 million years
B)About every 10 million years
C)About every 100 million years
D)This has yet to occur on Earth

Question 72

Only one side of the Moon faces Earth. Is this because the Moon spins about its axis, or doesn't spin about its axis? Defend your answer.

Question 73

When the Sun passes between the Moon and the Earth, we have

A)a solar eclipse.
B)a lunar eclipse.
C)met our end.

Question 74

The reason that the Moon takes on a crescent shape each month has to do with the

A)Earth's shadow.
B)Sun's position.
C)both of these
D)neither of these

Question 75

The reason we don't have solar and lunar eclipses monthly is because of the

A)relatively close distance of the Moon and Earth.
B)relatively long distance to the Sun.
C)tapering of the Sun's rays.
D)different orbital planes for Earth and the Moon.
E)23° tilt of the Earth's axis.

Question 76

When the alignment of the Sun, the Moon, and Earth produce a lunar eclipse, the body that is in between the other two is the

A)Sun.
B)Moon.
C)Earth.

Question 77

When the alignment of the Sun, the Moon, and Earth produce a solar eclipse, the body between the other two is the

A)Sun.
B)Moon.
C)Earth.

Question 78

Why do comet's tails always point away from the Sun?

A)Because of solar wind.
B)Because the inner planets cause the ice and other volatile materials to be pulled towards their orbits.
C)Because of the comet's interaction with dark matter.
D)Because when they move away from the Sun they begin to lose inertia.

Question 79

For what reason was Pluto demoted from full planetary status in 2006?

A)Because of objects as large or larger than Pluto in the Kuiper belt
B)Because Pluto resides outside of the zone that can truly be described as the solar system
C)Because Pluto was discovered to be a twin planet system
D)Because according to the standard definition, no planet can be smaller than the Earth's moon

Question 80

The fact that one side of the Moon always faces Earth is evidence that while revolving about the Earth it

A)does not rotate about its axis.
B)rotates about its axis.