question

"Ionized" hydrogen gas means that Select one: a. the protons and the electrons are together making neutral atoms b. the electrons have been ripped away from their protons c. the hydrogen atoms have fused to form helium nuclei d. the electrons and protons combine to form neutrons

answer

b

question

Einstein's formula E = mc2 relates how the matter in the sun is converted into pure energy to support the sun. The letter c is the Select one: a. Chandrasekhar limit b. charge of an electron c. speed of light d. cost of the energy

answer

c

question

Every second, the sun is converting 700 million tons of hydrogen gas into Select one: a. 700 million tons of helium b. 695 million tons of helium c. 700 million tons of hot hydrogen plasma d. 695 million tons of hot hydrogen plasma

answer

b

question

Most of the visible light we see coming from the sun originates from the Select one: a. magnetic field. b. sunspots. c. photosphere. d. chromosphere. e. corona.

answer

c

question

Our sun is "powered" by the fusion of hydrogen atoms into Select one: a. iron atoms b. bigger hydrogen atoms c. helium atoms d. carbon atoms

answer

c

question

Sunspots Select one: a. are regions where material is rising from below the photosphere. b. produce spicules. c. are generally found near the poles of the sun during sunspot maximum. d. are cooler than their surroundings. e. are the result of convection.

answer

d

question

The sun is a Select one: a. more than 100 times the diameter of the Earth b. able to hold more than a million Earths c. 300,000 times the mass of the Earth d. All of the above

answer

d

question

The sun's magnetic field is evident in the looped shapes of Select one: a. solar flares. b. prominences. c. sunspots. d. granules. e. the corona.

answer

b

question

The two most abundant elements in the sun are Select one: a. carbon and hydrogen. b. hydrogen and helium. c. sulfur and iron. d. nitrogen and oxygen. e. carbon and nitrogen.

answer

b

question

Which of the following is closest to the core temperature of the sun? Select one: a. 5800 Kelvin b. 1,000,000 Kelvin c. 15,000,000 Kelvin d. 300,000 Kelvin e. None of the above

answer

c

question

According to Phil, the Earth needs this to support life Select one: a. liquid water at the surface b. atmosphere c. magnetic field d. All of the above

answer

d

question

Although it is only a tiny fraction of the Earth's atmosphere, this chemical compound plays a large role in the Earth's "Greenhouse Effect". Select one: a. carbon dioxide b. water c. carbon monoxide d. sulfur dioxide

answer

a

question

The atmosphere of the Earth is approximately Select one: a. 50% oxygen, 50% nitrogen b. 78% nitrogen, 21% oxygen, 1%argon c. almost entirely oxygen d. 60% nitrogen, 20% oxygen, 20% carbon dioxide

answer

b

question

The atmosphere of the Earth is said to extend to Select one: a. 50 km aboove the Earth surface b. 100 km above the Earth surface c. to the Karman Line d. Both b and c are correct

answer

d

question

The continents move at about Select one: a. one inch per month b. the same rate your fingernails grow, 2 cm per year c. one centimeter per day d. one mm per year

answer

b

question

The crust of the Earth is made from lower density rock, which means that it floats on the Mantle. How are oceanic and continental crusts different? Select one: a. the oceanic crusts have more metals and are lower density than the continental crust b. there is no difference between the different crusts except name c. the oceanic crust is thicker than the continental crust d. the oceanic crusts are thinner than continental crusts

answer

d

question

The Earth core is actually comprised of two parts Select one: a. a solid outer core and liquid inner core b. a solid rocky inner core and a liquid metal out core c. a solid inner core made of iron and a liquid outer core made of nickel d. a solid metal inner core and a liquid metal outer core e. a solid metal inner core of nickel and a liquid outer core made of iron

answer

d

question

The Earth magnetic field is generated in the molten outer core of the Earth and Select one: a. protects the Earth from the solar wind by deflecting most of it b. is nearly aligned with the Earth axis c. traps some of the Solar wind particles and produces the Auroras d. All of the above

answer

d

question

The four rocky, denser planets that are closer to our sun are known as the Select one: a. metal giants b. terrestrial planets c. silicon giants d. gas giants e. water planets

answer

b

question

Which of the following is not a reason that the Earth's core is hot? Select one: a. frictional heating as denser material sinks toward the core b. radioactive decay of elements like uranium c. residual heat left over from the formation d. the heat of the sun shining on the Earth

answer

d

question

According to Phil, will we be able to have Moon base soon Select one: a. Yes, a teenager somewhere will be the first colonist on the Moon b. No, it will be too hard to build a base c. No, we will be sending robots to mine the Moon d. Yes, but it will be at least 100 years from now

answer

a

question

Craters near the North Pole of the Moon are in perpetual darkness and evidence suggests extensive deposits of Select one: a. water ice b. carbon dioxide ice c. methane d. liquid water

answer

a

question

One noticeable feature on the far side of the moon (the side we cannot normally see) is Select one: a. secret moonbase b. enormous crater c. distinctive lack of maria d. distinctive red color of the lunar soil e. extensive network of maria

answer

c

question

Rocks from the lunar Maria are ___________ Million years old. Select one: a. 3.0 to 3.5 b. 1.0 to 2.0 c. 4.0 to 4.5 d. 2.0 - 2.5

answer

a

question

The best theory whcih explains the origin of the moon is known as the Select one: a. Planetary adoption hypothesis b. Daughter theory c. Giant impact hypothesis d. Venus capture theory

answer

c

question

The first mission to see the far side of the Moon was Select one: a. Rosetta Mission in 2013 b. Project Gemini in 1964 c. Luna 3 mission in 1959 d. Sputnik mission in 1957 e. Apollo 9 mission in 1969

answer

c

question

The Moon (the one that orbits the Earth) is the _______________ biggest moon in the solar system. Select one: a. fourth b. third c. second d. fifth

answer

d

question

The Moon is tidally locked to the Earth which means that Select one: a. one face of the Moon always faces the Earth b. the Tidal forces of the Moon cause the Earth to slow down c. the Moon has tides like the Earth d. the Moon does not rotate but one face always faces the star Polaris

answer

a

question

The near side of the Moon (the part we can see) has two surface types: the heavily cratered highlands and Select one: a. the smooth, dark maria b. the smooth, bright highlands c. the heavily cratered, dark maria d. the smooth, dark highlands

answer

a

question

The rays that emanate from the crater Tycho in teh Moon's Southern hemisphere stretch for Select one: a. 500 km b. 100 km c. 150 km d. 2500 km e. 1500 km

answer

e

question

If you were to stand on Mercury's surface, how long would it take for the noon sun to come back to noon again (one synodic day)? Select one: a. 118 days b. 59 days c. 176 days d. 88 days

answer

c

question

In 1965, astronomers used Doppler radar to determine that in contrast to Mercury's Year (88 days), Mercury rotates once every _______. Select one: a. 88 days b. 59 days c. 24 hours d. 176 days e. 365 days

answer

b

question

Mercury has almost no atmosphere, and being close to the sun means that the surface temperature can reach Select one: a. -20 degrees Celsius b. more than 400 degrees Celsius c. about 0 degrees Celsius d. nearly 100 degrees Celsius

answer

b

question

Mercury orbits closer to the sun than the Earth, and from the our point of view on the Earth never reaches a separation of more than ______ degrees from the sun. Select one: a. 14 b. 7 c. 5 d. 42 e. 28

answer

e

question

Mercury's craters are named after Select one: a. artists b. scientists c. philosophers d. presidents

answer

a

question

Mercury's iron core might be as much as ___________ percent of its radius. Select one: a. 50 b. 90 c. 25 d. 75

answer

d

question

One thing that is special about Mercury's orbit than all of the other planets is that it is Select one: a. the most elliptical orbit of the planets b. further from the sun than Venus at perihelion c. further from the sun than Venus at aphelion d. almost exactly a circle e. inclined to the ecliptic by 18 degrees

answer

a

question

The one thing that cannot be found on Mercury's surface is Select one: a. wrinkle ridges (rupes) b. enormous craters c. dust d. water ice e. an atmosphere

answer

e

question

The reason why craters might be larger on Mercury is Select one: a. they are hit with bigger meteorites b. the strong gravitational field of Mercury speeds them up c. Mercury is protected by the large mass of the sun d. the speed of Mercury in orbit is higher than the other planets

answer

d

question

Water ice is found in the bottom of deep craters called "cold traps", located Select one: a. at a Mercury latutude of 10 degrees South b. near the Mercury equator c. the Mercury poles d. at a Mercury latutude of 10 degrees North

answer

c

question

Does Venus have a magnetic field? Select one: a. no, because it has a rapid rotation b. no, because of its slow rotation c. yes, because of its slow rotation d. yes, because of its rapid rotation

answer

b

question

How has the solar wind affected the atmosphere of Venus? Select one: a. energized the lighter molecules, taking them away b. energized the lighter molecules so that they formed ozone c. energized the heavy molecules, taking them away d. energized the heavy molecules, converting them to sulfuric acid

answer

a

question

One day on Venus (synodic period from noon to noon) is Select one: a. about 12 Earth hours b. about 1 Earth year c. about 243 Earth days d. about 1 Earth day

answer

c

question

The last time Venus passed in front of the sun was 2012. The next time this event will occur is in the year Select one: a. 2051 b. 2021 c. 2117 d. 2017

answer

c

question

The rains of Venus are composed of droplets of _________, but the high temperature means that the liquid droplets never make it to the planet surface. Select one: a. carbon dioxide b. sulfuric acid c. methane d. lead e. liquid water

answer

b

question

The surface of Venus is hot enough to melt lead, about Select one: a. 240 degrees Celsius b. 200 degrees Celsius c. 100 degrees Celsisus d. 460 degrees Celsius e. 420 degrees Celsius

answer

d

question

Venus appears to a relatively new surface with relatively few craters. What is a possible explanation for the resurfacing of Venus as recently as 500 million years ago? Select one: a. the trapped heat from the sun b. heavy bombardment of material c. Venus was molten until about 500 million years ago d. volcanic activity that completely covered the surface with lava flows

answer

d

question

Venus has a much thicker atmosphere than Earth. The composition is almost entirely carbon dioxide. The surface pressure of Venus is about _________ times that of the surface of Earth Select one: a. 90 b. 4 c. 10 d. 2 e. 1/2

answer

a

question

Venus has phases and changes size as we see it from Earth.In which of these phases would Venus appear brightest as seen from Earth? Select one: a. waxing gibbous b. third quarter c. waxing crescent d. first quarter e. full

answer

c

question

When we see Venus pass in front of the sun, it is called a Select one: a. transit event b. solar eclipse c. lunar eclips d. Venus eclipse

answer

a

question

Which of the following explains why Venus appears so bright to us? Select one: a. the thick cloud layer reflects most of the sun's light b. it reflects some of its light back toward the sun c. it always appears full from the Earth d. the Venus atmosphere is nearly a perfect absorber of light, "a perfect blackbody"

answer

a

question

Jupiter (and Saturn as well) is mostly made of Select one: a. iron and rocky material b. carbon dioxide c. ammonia and methane d. hydrogen and helium e. nitrogen

answer

d

question

Jupiter is rotating faster than any of the other planets. Jupiter's rotation period is about Select one: a. about 3 Earth hours b. about 10 Earth hours c. same as Earth, 24 hours d. about 2 Earth hours e. about 12 Earth hours

answer

b

question

Jupiter is the diameter of 11 Earths and could fit _________ Earths within its volume. Select one: a. 11 b. more than 1,000 c. about 100 d. more than 1,000,000 e. 121

answer

b

question

Jupiter's intense magnetic field is generated in the Select one: a. liquid hydrogen layer b. gaseous hydrogen in the outer layers c. metallic hydrogen mantle d. solid inner core

answer

c

question

Liquid metallic hydrogen is found in the mantle region of Jupiter and is formed when hydrogen atoms are pushed together under intense pressure so that they can Select one: a. combine chemically with methand and ammonia to form complex organic compounds b. crystallize into a block of hydrogen ice c. form helium through nuclear fusion d. share electrons like a metal and conduct electricity

answer

d

question

Technically speaking the Great Red Spot on Jupiter is a vortex of rapidly moving gases called a Select one: a. swirly b. hurricane c. tornado d. anti-cyclone

answer

d

question

The Belts and Zones on Jupiter occur as heat is escaping the planet by Select one: a. Convection b. Conduction c. All of the above d. Radiation

answer

a

question

The red in Jupiter's coloring is probably due to cyanide-like molecules Select one: a. that absorb red and allow blue to pass undisturbed b. that absorb blue and allow red to pass undisturbed c. that absorb and emit blue light d. that absorb and emit red light

answer

b

question

The temperature of the metallic hydrogen is about Select one: a. 10,000 Kelvin, hotter than the surface of the sun b. 100 Kelvin, below the freezing point of water c. 1,000 Kelvin, above the melting point of lead d. 10,000,000 Kelvin, hot enough to fuse hydrogen like the sun e. 100,000 Kelvin

answer

a

question

Jupiter is a failed star. Jupiter was close to becoming a star like the sun. Select one: True False

answer

false

question

Although Saturns rings are about 250,000 km in diameter, the thickness of the rings on average are about Select one: a. 10 m b. 1 km c. 100 km d. 100 m

answer

a

question

Saturn has a rotational period of Select one: a. 10.5 houra b. 365 days c. 12 hours d. 24 hours

answer

a

question

The average density of Saturn is Select one: a. about the same as Earth b. is greater than Jupiter c. less than that of water on Earth d. less than any other planet e. Both c and d are correct

answer

e

question

The Cassini mission carried a special probe called the Huygens probe which landed on the moon Select one: a. Mimas b. Enceladus c. Iapetus d. Titan e. Europa

answer

d

question

The first astronomer to correctly identify that Saturn had a ring system around it was Select one: a. Kepler b. Newton c. Huygens d. Galileo

answer

c

question

The gap between the A ring and the B ring is known as the Select one: a. A-B ring gap b. Encke gap c. band gap d. Cassini division

answer

d

question

The moons Prometheus and Pandora are special because they keep the particles in which of Saturn's rings together? Select one: a. C b. D c. B d. F e. A

answer

d

question

There is a very interesting storm at the North Pole of Saturn. It is about 20,000 km across and persistent. The storm has the shape of a Select one: a. square b. star c. ellipse d. hexagon

answer

d

question

Which of Saturn's rings are closest to the planetary body? Select one: a. F b. B c. A d. C e. D

answer

e

question

Which of the following makes Titan special? Select one: a. it is the only moon in the solar system with an atmosphere b. cryovolcanoes that spew liquid water c. liquid methane lakes d. all of the above e. weathering of the surface

answer

d

question

According to Phil, if we could somehow find a way to look inside Uranus we might find these floating deep inside, somewhat like icebergs in the oceans of Earth. They form when hydrocarbons are crushed by intense pressure inside the planet. Select one: a. iron crystals b. diamonds c. nickel crystals d. sulfuric acid crystals

answer

b

question

According to Phil, the clouds of Uranus are made of all EXCEPT Select one: a. water b. hydrogen sulfide c. ammonia d. methane

answer

a

question

Sustained winds in Neptune's atmosphere have been measured to be Select one: a. trick question, there are no winds b. over 2000 miles per hour c. nearly 1000 miles per hour d. nearly 100 miles per hour e. nearly 500 miles per hour

answer

b

question

The blue color of Uranus and Neptune is due to the presence of methane in the atmosphere which Select one: a. absorbs red light and reflects green and blue light b. absorbs and scatters red light c. absorbs and scatters blue light d. absorbs green and reflects red and blue light

answer

a

question

The magnetic fields of both Uranus and Neptune are unusual because they Select one: a. are generated by metallic hydrogen in the core b. are not aligned with the axis of rotation c. flip every 17 years d. are much stronger than Jupiter's magnetic field

answer

b

question

The moon of Neptune called Triton has a very weak atmosphere of nitrogen and geysers of Select one: a. liquid ammonia b. liquid carbon dioxide c. liquid nitrogen d. liquid salt water

answer

c

question

The tallest cliff in the Solar System is Verona Rupa which is found on the moon _______________. It would take you six minutes to fall from the top of it to the bottom. Select one: a. Miranda b. Umbriel c. Titania d. Ariel

answer

a

question

Uranus has the most extreme seasons in the solar system because Select one: a. it is tilted 98 degrees to the ecliptic plane b. the clouds solidify when Uranus approaches perihelion c. it has a retrograde revolution around the sun d. it has an extrememly eccentric orbit

answer

a

question

Uranus was the first planet to be discovered by telescope, in 1781, by Select one: a. Galileo Galilee b. Hans Lippershey c. Isaac Newton d. William Herschel

answer

d

question

Which of the following is NOT found in the interior of Uranus and Neptune Select one: a. solid rocky and metal core b. liquid hydrogen c. metallic hydrogen mantle d. water, ammonia and methane ice mantle

answer

c

question

absorption je kada: a; gledas direktno kroz cloud b; gledas samo u gas cloud c; gledas direkt u izvor svetlosti bez gledanja u cloud

answer

a

question

emission je kada: a; gledas direktno kroz cloud b; gledas samo u gas cloud c; gledas direkt u izvor svetlosti bez gledanja u cloud

answer

b

question

An atom that is excited Select one: a. is also ionized. b. can emit a photon when the electron moves to a higher energy level. c. can emit a photon when the electron moves to a lower energy level. d. has had its electron moved to the lowest energy level. e. is an isotope.

answer

c

question

Differential rotation of the sun is Select one: a. the equatorial regions of the sun rotating more rapidly than the polar regions. b. heating in the chromosphere and corona that makes them hotter than the photosphere. c. the magnetic dynamo inside the sun. d. the origin (and subsequent disappearance of) sunspots first near the poles then closer to the sun's equator as the sunspot cycle progresses. e. the rotation of the sun's southern and northern hemispheres in opposite directions.

answer

a

question

Granulation is caused by Select one: a. sunspots. b. the solar wind flowing away from the corona. c. rising and sink gases below the photosphere. d. shock waves in the corona. e. the heating in the chromosphere.

answer

c

question

Most of the visible light we see coming from the sun originates from the Select one: a. sunspots. b. magnetic field. c. photosphere. d. chromosphere. e. corona.

answer

c

question

one star has a temperature of 10,000 K and another star has a temperature of 5,000 K. Compared to the cooler star, how much more energy per second will the hotter star radiate from each square meter of its surface? Select one: a. 625 times b. 16 times c. 25 times d. 1 ´ 1016 times e. 2 times

answer

b

question

The energy of a photon is directly proportional to the light's Select one: a. intensity. b. speed. c. frequency. d. wavelength.

answer

c

question

The lowest energy level in an atom is Select one: a. the absolute zero temperature. b. the energy level from which the Paschen series of hydrogen originates. c. responsible for Doppler shifts. d. the ionization level. e. the ground state.

answer

e

question

The neutral hydrogen atom consists of Select one: a. one proton and one neutron. b. one proton and one electron. c. an isotope and an ion. d. one proton, one neutron, and one electron. e. one proton.

answer

b

question

The two most abundant elements in the sun are Select one: a. carbon and hydrogen. b. sulfur and iron. c. hydrogen and helium. d. nitrogen and oxygen. e. carbon and nitrogen.

answer

c

question

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K? Select one: a. The stars are hot enough that most of the hydrogen is ionized and the atoms can not absorb energy. b. These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state. c. Stars of this temperature are too cool to produce an absorption spectrum. d. There is no hydrogen in stars this hot. e. Stars of this temperature are too hot to produce an absorption spectrum.

answer

a

question

You are standing near a railroad track and a train is moving toward you at 60 mph and blowing its horn. What will you notice as the train moves past you? Select one: a. The horn will get quieter as the train moves toward you. b. As the train approaches, the horn will sound lower in pitch than when the train is moving away. c. The horn will get louder as the train moves away from you. d. There will be no change in the pitch of the horn as it moves by. e. As the train approaches, the horn will sound higher in pitch than when the train is moving away.

answer

e

question

Compared to the Earth, the moon is no longer geologically active because Select one: a. it does not have water on its surface. b. its radioactive elements were never abundant. c. it is rotating too slowly. d. it is much smaller in mass. e. its crust is too thin.

answer

d

question

How rapidly a planet loses its atmosphere depends on the planet's I. escape velocity (determined by mass and radius) II. atmospheric composition III. temperature IV. rotation period Select one: a. I, II, & III b. I & II c. I, II, III, & IV d. III & IV e. II, III, & IV

answer

a

question

In the development of a terrestrial planet, the stage of ____ when dense material settled to the core and less dense to the outer parts. Select one: a. flooding b. glaciation c. cratering d. differentiation e. accretion

answer

d

question

Motion of the plates of Earth's crust is thought to be due to Select one: a. tides in the oceans. b. the solar wind. c. friction between wind and the land surface. d. convection from the hot interior. e. Earth's magnetic field.

answer

d

question

That the moon has no magnetic field implies that Select one: a. the interior of the moon is too hot to produce a magnetic field. b. the moon is spinning too slowly to produce a magnetic field. c. the moon's core contains little if any molten iron. d. the moon is moving further from Earth. e. the crust of the moon is so thick that the magnetic field can not get out of the interior.

answer

c

question

The extreme size of volcanoes on Mars indicates that Select one: a. Mars has a much thicker crust than Earth. b. water once flowed in streams on Mars. c. large moving plates have not formed on Mars. d. a and c e. a, b, and c

answer

d

question

The geology of Venus appears to be dominated by Select one: a. strip mining. b. erosion by flowing water. c. volcanism. d. impact cratering. e. plate tectonics.

answer

c

question

The greenhouse effect produces excess heat in a planet's atmosphere by Select one: a. trapping infrared radiation from escaping into space. b. trapping ultraviolet light in the upper atmosphere of the planet. c. trapping light gases from escaping into space. d. clouds blocking the surface from receiving any infrared radiation.

answer

a

question

The Himalayan Mountains are rugged, jagged peaks and the Appalachians are smooth and rolling. Why is there a difference? Select one: a. The Himalayas are much older and the rocks have begun breaking off. b. The Himalayas are volcanic mountains and the Appalachians are not. c. The Appalachians are much older and have been smoothed by erosion. d. The Appalachians are younger and just started to be thrust upward by plate tectonics. e. a and d

answer

c

question

The lunar maria are Select one: a. less than one billion years old. b. the smooth plateaus of the lunar highlands. c. older than the lunar highlands. d. the lava plains of the lunar lowlands. e. moving plates of lunar crust.

answer

d

question

The surface of Venus has been studied Select one: a. using radar maps made from Earth. b. using radar maps made from satellites orbiting Venus. c. using spacecraft that have landed on the surface of Venus. d. all of the above e. only b and c

answer

d

question

What do astronomers generally believe about the origin of Mars' moons? Select one: a. They formed with the planet out of the protoplanetary material. b. They formed elsewhere and were captured at a later time. c. They were ejected from Mars during its formation. d. They were once a single moon and a later catastrophic event broke them in two.

answer

b

question

Which hypothesis concerning the formation of the Moon makes predictions that best fit the observed lunar data? Select one: a. The condensation hypothesis b. The capture hypothesis c. The large impact hypothesis d. The fission hypothesis e. The regolith hypothesis

answer

c

question

Which of the terrestrial planets has the most difficult time retaining an atmosphere? Select one: a. Venus b. Mercury c. Earth d. Mars

answer

b

question

Why does Mars have seasons similar to the Earth? Select one: a. The shape of Mars' orbit is the same as the Earth's. b. Mars' rotational axis is tilted relative to its orbit like the Earth's. c. Mars has the same size as the Earth. d. Mars is roughly the same distance from the sun as Earth.

answer

b

question

____ is a very long and deep canyon on Mars. Select one: a. Phobos b. Valles Marineris c. Ishtar Terra d. Lobate Scarp e. Tharsis Bulge

answer

b

question

At Jupiter's very center is probably a small core of Select one: a. heavy element (rock and iron) core b. helium c. hydrogen d. Both A and B

answer

a

question

Both Jupiter and Saturn Select one: a. have liquid metallic hydrogen in their interiors. b. have rings. c. emit more energy than they absorb from the sun. d. have belt and zone circulation. e. all of the above

answer

e

question

Europa has few craters because Select one: a. it has erased craters nearly as fast as they have formed. b. it does not have a solid surface. c. it keeps one face always pointed toward Jupiter which screens it from incoming meteorites. d. its surface is not strong enough to support craters. e. it is protected from impacts by Jupiter's gravity.

answer

a

question

Jupiter does not have Select one: a. convection occurring in its atmosphere. b. a dynamo effect. c. any rings. d. a hot interior. e. crustal plates on its surface.

answer

e

question

Some narrow rings of Saturn are seen in space probe photos to be caused by Select one: a. gravitational interactions between ring particles. b. the magnetic field which holds them in place. c. small shepherd moons that orbit inside and outside the rings d. a spiral density wave which confines them.

answer

c

question

The magnetic fields of Uranus and Neptune are peculiar in that they are Select one: a. highly inclined to their planet's axis of rotation. b. very weak (virtually zero). c. produced by the solar wind. d. produced by disturbances caused by the orbits of the moons. e. all of the above

answer

a

question

The reddish particles in Jupiter's ring are less than 1 percent as reflective as Saturn's whiter particles. Saturn's ring particles are thought to be ____while Jupiters are thought to be ______ Select one: a. icy; also icy b. rock; also rock c. rocky; icy d. icy; rocky

answer

d

question

The Roche limit is the Select one: a. minimum mass of an object in the solar system that would be classified as a planet. b. distance from Earth at which we loose radio communication with a satellite. c. distance from a planet within which a moon cannot hold itself together. d. distance from the sun within which a planet can not retain an atmosphere. e. maximum separation distance between the sun and a given planet.

answer

c

question

The ____ of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles. Select one: a. hydrosphere b. Schwarzschild radius c. magnetosphere d. aurora e. corona

answer

c

question

Uranus and Neptune appear blue or blue-green because Select one: a. their atmospheres absorb blue light very efficiently. b. their solid air-less surfaces are this color c. their surfaces are covered with liquid water with no atmosphere d. traces of methane in their atmospheres absorb red light very efficiently.

answer

d

question

Uranus and Neptune do not contain liquid metallic hydrogen because they Select one: a. do not contain enough hydrogen. b. have magnetic fields that are much too weak. c. rotate too slowly. d. are not massive enough. e. are too far from the sun.

answer

d

question

What causes the geological activity seen on some of the inner moons of Jupiter? Select one: a. The strong magnetic field of Jupiter heats the surface of the inner moons. b. Tidal friction as a result of being so close Jupiter heats their interiors. c. Constant collisions with space debris provide a power source for geological activity. d. Solar radiation reflected of Jupiter's surface provides a power source for geological activity.

answer

b

question

What type of geological activity is seen on Neptune's moon Triton? Select one: a. Plate tectonics and earthquakes are a common occurrence on Triton. b. Geysers of liquid nitrogen are seen erupting from its surface. c. Volcanoes of molten lava, similar to Earth, have been seen there. d. Geysers of liquid water are seen erupting from its surface.

answer

b

question

Which of the following are found on Triton? Select one: a. craters b. flooded basins c. atmospheric clouds d. a tenuous but measurable nitrogen atmosphere e. all of the above

answer

e

question

Which of these Galilean satellites is most geologically active? Select one: a. Io b. Callisto c. Ganymede d. Europa

answer

a

question

Why is Saturn's moon Titan able to retain an atmosphere?..... Select one: a. It is so close to Saturn that Saturn's gravity retains Titan's atmosphere. b. Titan only contains light gases which are easy to retain. c. Titan is biologically active. d. Titan has a large enough mass and is cold enough.

answer

d

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