astro unit 2

What kind of radiation does the Earth's surface re-radiate after it absorbs sunlight? A) Radio. B) Infrared. C) X-rays. D) Ultraviolet. E) Microwave.

B

Where do mountains like the Himalayas come from? A) Rain of debris from meteorites and comets falls in some places more than others, and builds up into mountains. B) In some locations, plates of rock on the planet's surface press together and the plates rise together. C) The Earth is made of molten rock and metals, and regions with opposite electrical charges attract each other and form peaks. D) The Moon's gravity pulls some layers up into mountain ranges. E) The Earth formed by an irregular processes and that is just the way that it was shaped when the molten rock cooled into place.

B

Which characterizes the magnetosphere/strength of magnetic fields on Jupiter? A) a thousand times that on Earth so that it cannot have aurora B) ten times stronger than Earth so that it has aurora C) completely absent D) weaker than that on Earth, but it still has aurora E) the same as on Earth so that it has aurora

B

Which fact about comets is FALSE? A. Comets are a complex mix of ice and dust. B. Comets' tails disappear when they are closest to the Sun. C. Short period comets have orbital periods less than 200 years and have predictable orbits. D. In ancient history, the appearance of a comet was regarded as a sign that unpleasant events would occur. E. The dust tail of a comet is white, diffuse, and curved.

B

Which has the lowest average density? A) Venus B) Saturn C) the Moon D) Mercury E) Mars

B

Which of the following describes how the sky would appear for someone standing on the surface of Mercury? A) The sky would appear blue since Mercury's atmosphere is similar to Earth's. B) The sky would appear black since Mercury has next to no atmosphere. C) The sky would look blue at the zenith and black near the horizon. D) All of the above. E) None of the above.

B

Which of the following has the most significant (densest) atmosphere? A.Mercury B.Venus C.Mars D.Pluto E.Earth's Moon

B

Which of the following is typical of a Jovian planet? A) an average density about that of rock B) the presence of many moons C) an orbit inside the asteroid belt D) evidence for volcanic activity E) a hydrogen-poor composition

B

Which of the following moons is most volcanically active? A.Ganymede B.Io C.Callisto D.Titan E.Europa

B

Which of the following planets is never visible from Earth at midnight? A) Jupiter B) Venus C) Uranus D) Mars E) Saturn

B

Which planet has a temperature of 400 degrees Centigrade on the side facing the Sun and -180 degrees Centigrade on the side opposite the Sun? A.Venus B.Mercury C.Jupiter D.Earth E.Mars

B

Which statement about the rotation of the inner planets is true? A) All have rotation periods about equal to their periods to orbit the Sun. B) Venus rotates in the opposite direction from the three others. C) The rotation periods of all of them are the same, i.e. 1 Earth day. D) All rotate in the same direction. E) All have rotation periods of 365 Earth days.

B

Why are Uranus's rings darker in color (gray) than Saturn's or Jupiter's? A.they do not have as much nuclear activity in them, so they do not produce as much light. B.they have a lot of carbon/soot-like material in them. C.there is more sunlight incident on Uranus's rings because of its greater distance from the Sun. D.there is less sunlight incident on Uranus's rings because of its smaller distance from the Sun. E.they are blocking more light from the stars behind them.

B

Why do the orbits of the planets all lie in nearly the same plane? A) The Sun's gravity forced them into these orbits. B) The early solar nebula flattened into a disk. C) The angular momentum of the solar system was kept to a minimum this way. D) This happened purely by chance. E) Collisions between planetesimals destroyed all planets that would have been elsewhere.

B

Why does Mars have seasons? A. Mars has a very elliptical orbit that brings it very close to the Sun during summer, and far from the Sun during winter. B. Its axis is tilted relative to its orbital plane. C. Its orbit is circular. D. Mars has an atmosphere which deteriorates and regenerates on a yearly cycle. E. It rotates only a few times during each orbit around the Sun.

B

Why is Venus's day so long (a day-night cycle on Venus lasts for as long as 243 Earth day and night cycles)? A.No one knows the reason. B.Venus's rotation time is very long compared to the time it takes to go once around the Sun. C.Because Venus's year is longer than a year on Earth. D.Venus's rotation time is very short compared to the time it takes to go once around the Sun. E.Because Venus's year is shorter than a year on Earth.

B

Based on current evidence and understanding, what is the composition at the center of Neptune and in fact at the center of all the giant planets in the outer Solar System? A) there is no core; Neptune just has an atmosphere B) swiss cheese C) a solid, rocky core D) liquid core made of hydrochloric acid E) methane gas mixed with water

C

Given what we learned about the history of the solar system and the "heavy bombardment phase" that it went through, if a planet or a moon has very few craters on its surface, then which of the following is the most likely reason? A) The planet (or moon) has few craters because it was never bombarded by asteroids, comets or other minor solar system debris. B) The craters are present on the planet's (or moon's) surface but we do not have good images. C) The planet (or moon) did have impacts with asteroids and comets from space, but the craters from those impacts were eroded over time by some natural process. D) All of the above. E) None of the above.

C

How is Pluto now classified by astronomers? A.as a planet B.as a comet C.as a dwarf planet D.as a star E.as an asteroid

C

If not a single solid sheet, then the ring system of Saturn is best described as: A. rapidly expanding gas with various different chemical compositions. B. randomly moving particles that will soon disperse in all directions. C. individually orbiting particles that are clustered around certain orbits. D. just an illusion. E. randomly moving particles that frequently collide, so that the force of collision quickly pushes the rings apart.

C

Io, Europa, Ganymede, and Callisto are called the "Galilean" satellites because: A.They are named after Galileo's daughters. B.The "Galileo" spacecraft discovered them. C.Galileo was the first to identify them as moons of Jupiter. D.They were discovered the year Galileo died. E."Jupiter" was originally called "Galileo" in Greek.

C

Mercury is visible to us: A.only in the summer. B.only in the winter. C.only very briefly near sunrise or sunset. D.only during its new phase. E.only during the several hours around midnight.

C

The Huygens probe saw bright and dark regions on the surface of Titan. Based on the measurements that Huygens carried out while descending through Titan's atmosphere, what are these dark and bright regions likely to be made of? A) The dark and bright regions were mere illusions created by Titan's thick atmosphere. B) The bright regions are liquid water and the dark regions are volcanic ash. C) The dark regions are hydrocarbon mixtures and the bright areas are water ice. D) All of the above E) None of the above.

C

The Sun is at one focus of the elliptical orbit of the Earth around the Sun. What is at the other focus? A) The Moon. B) Jupiter. C) Nothing. D) Mars. E) The Earth.

C

The process of formation of the Solar System A) began about 10 million years ago. B) involved the Sun forming from the collapse of a large planet. C) took only a small fraction of the age of the Solar System. D) involved a spinning cloud of gas that remained spherical until after the planets and Sun formed. E) led to the formation of the most massive planets closest to the Sun and the least massive farthest away.

C

What general conclusion can we draw about the history of Martian geology? A) The northern and southern plains are of the same age. B) Water on the surface of Mars led to the many craters in its southern hemisphere. C) The southern hemisphere with its highlands and craters are much older surfaces than the crater-deficient northern hemisphere with its lowlands. D) The northern lowlands are much older surfaces than the southern regions, with its highlands and craters. E) Nothing meaningful can be deduced.

C

What was Kepler's Third Law? A) The cube of the time period of the planet's orbit is proportional to the square of its average distance from the Sun (P3 is proportional to a2). B) The time period for an orbit of a planet is proportional to the cube of its average distance from Sun (in other words P is proportional to a3). C) The square of the time period for an orbit of a planet is proportional to cube of its average distance from Sun (in other words P2 is proportional to a3). D) The closer a planet is to the Sun, the longer a time it takes for it to complete one orbit around the Sun. E) The farther away a planet is from the Sun, the shorter a time it takes for it to complete one orbit around the Sun.

C

Which Terrestrial planet has the lowest density atmosphere (i.e. none)? A) Earth B) Mars C) Mercury D) Venus E) Jupiter

C

Which fact about comets is FALSE? A) Comets are a complex mix of ice and dust. B) In ancient history, the appearance of a comet was regarded as a sign that unpleasant events would occur. C) Comets' tails disappear when they are closest to the Sun. D) The dust tail of a comet is white, diffuse, and curved. E) Short period comets have orbital periods less than 200 years and have predictable orbits.

C

Which is smallest? A) Jupiter's moon Ganymede B) Saturn's moon Titan C) Saturn's moon Encledus D) Mercury E) Earth

C

Which of the following could be the reason that Mars has only a thin atmosphere? A. The atmosphere is spread over a very large area. B. The gravitational pull from Earth caused Mars to lose some of its atmosphere. C. The gravity on Mars was insufficient to hold a thick atmosphere and hence the gases in the atmosphere escaped over time. D. All of the above. E. None of the above

C

Which of the following is TRUE? A.Mercury has a very thick atmosphere made mostly of carbon dioxide. B.Venus has no volcanos on its surface. C.Mercury rotates exactly one and a half times for every one revolution around the Sun. D.The runaway greenhouse effect causes the present temperatures on Mars to exceed those on Earth. E.The average surface temperature of Venus is about 30 degrees Fahrenheit.

C

Which of the following is typical of a Jovian planet? A.an orbit inside the asteroid belt B.a hydrogen-poor composition C.the presence of many moons D.an average density about that of rock E.evidence for volcanic activity

C

Based on current evidence and understanding, what is the composition at the center of Neptune and in fact at the center of all the giant planets in the outer Solar System? A.swiss cheese. B.liquid core made of hydrochloric acid C.methane gas mixed with water. D.a solid, rocky core. E.There is no core; Neptune just has an atmosphere.

D

Comparing Mercury to the Earth's Moon: A.Mercury is more than 100 times the mass of Earth's Moon. B.Mercury is only about 1/100th the mass of Earth's Moon C.they both take the same time to complete one orbit around the Sun. D.they both have little atmosphere and a similarly cratered surface. E.Since Mercury has so many active volcanoes, the craters on its surface have almost all been wiped away, while the Moon's craters remain.

D

How does Pluto's mass compare with that of Earth's Moon? A. Pluto is roughly 7 times more massive that the Moon. B. Pluto's mass is roughly 1/20th the mass of the Moon. C. They both have the same mass. D. The Moon is roughly 7 times more massive than Pluto. E. The Moon's mass is roughly 1/20th the mass of Pluto.

D

How is Pluto now classified by astronomers? A) as an asteroid B) as a comet C) as a star D) as a dwarf planet E) as a planet

D

Mars has a mass that is 1/10th the mass of the Earth and a radius that is 1/2 the radius of Earth. Compare the force of gravity on Mar's surface to that on the surface of Earth using the proportional relationship F is proportional to M/R2. A. Gravity on Mars is 4 times stronger than on Earth. B.Gravity on Mars is 10 times stronger than on Earth. C.Gravity on Mars is equal to gravity on Earth. D.Gravity on Mars is 4/10ths as strong as on Earth. E.Gravity on Mars is 1/10th as strong as on Earth.

D

Planet A has an orbit with a semi-major axis of 1 Astronomical Units. Planet B has an orbit with a semi-major axis of 4 Astronomical Units. How does the orbital period compare between the two planets? Use P2 = a3 to estimate. A. Planet B has an orbital period 4 times shorter than Planet A. B. Planet B has an orbital period 64 times longer than Planet A. C. Planet B has an orbital period 4 times longer than Planet A. D. Planet B has an orbital period 8 times longer than Planet A. E. Planet B has an orbital period 64 times shorter than Planet A.

D

Saturn is about 10 times as far from the Sun as Earth is (a = 10 AU, roughly). About how many times does Earth orbit the Sun in the time it takes Saturn to orbit just once? Remember P2 is proportional to a3. A.12 B.0.5 C.60 D.32 E.1

D

The Oort Cloud is thought to be: A.The cloud of gas and dust from which our solar system formed. B.A cloud of debris that occasionally encounters the Earth, causing a meteor shower. C.A planetary nebula surrounding the second nearest star to the solar system. D.A spherical cloud of comets surrounding the solar system. E.A cloud of asteroids moving between the orbits of Mars and Jupiter.

D

The Oort Cloud is thought to be: A) A cloud of asteroids moving between the orbits of Mars and Jupiter. B) A cloud of debris that occasionally encounters the Earth, causing a meteor shower. C) The cloud of gas and dust from which our solar system formed. D) A spherical cloud of comets surrounding the solar system. E) A planetary nebula surrounding the second nearest star to the solar system.

D

The escape velocity needed for an atom in the atmosphere of a planet to escape the gravitational pull of the planet is larger if: A. the mass of the planet is smaller B. the radius of the planet is larger C. the temperature of the gas in the atmosphere is higher D. the mass of the atom is larger E. the planet is closer to the Sun

D

What is the leading theory to explain why the dinosaurs became extinct? A) a massive drought B) a more intelligent species replaced that population C) destruction of the ozone layer D) the aftermath of a giant asteroid impact E) dinosaurs were just too large to survive

D

Which of the following are the terrestrial planets? A) Mercury, Venus, Earth, Mars, Pluto B) Mercury, Earth, Uranus, Neptune C) Earth, Mars, Jupiter, Saturn D) Mercury, Venus, Earth, Mars E) Earth only

D

Which of the following statements is TRUE? A. Saturn has small- and medium-sized moons, but no large ones. B. Jupiter's solid surface lies just below the cloud layers visible from Earth. C. Neither Uranus or Neptune have ring systems. D. The Great Red Spot is an anti-cyclone on Jupiter E. There is no evidence to suggest that either Jupiter or Saturn has a rocky core.

D

Which planet is very hot because of an extreme greenhouse effect? A) Mars B) Earth C) Jupiter D) Venus E) Mercury

D

Why is Venus's day so long (a day-night cycle on Venus lasts for as long as 243 Earth day and night cycles)? A) No one knows the reason. B) Because Venus's year is shorter than a year on Earth. C) Because Venus's year is longer than a year on Earth. D) Venus's rotation time is very long compared to the time it takes to go once around the Sun. E) Venus's rotation time is very short compared to the time it takes to go once around the Sun.

D

Without greenhouse gases, the Earth's surface temperature would be: A.Unchanged. B.Hotter in the summer and cooler in the winter. C.Hotter in the winter and cooler in the summer. D.33 degrees Centigrade cooler. E.33 degrees Centigrade warmer.

D

A comet's nucleus is composed of: A.dust, dry ice, and water ice. B.methane and hydrocarbons C.just iron D.gases, including mostly hydrogen and helium. E.iron and silicates.

A

A planet is in orbit around the Sun. The semimajor axis of the orbit is 4 Astronomical Units (AU). Use P2 = a3 to calculate the period of the orbit in years. A) 8.0 years B) 64 years C) 4.0 years D) 16.0 years E) 135 years

A

Based on what we see in panoramic images, why do you think Moon is likely NOT to have an atmosphere? A) If the Moon had an atmosphere, it would scatter sunlight in all directions and the lunar sky would look bright. B) If the Moon had an atmosphere, the light from the Sun would heat the atoms in the atmosphere and the atmosphere would start glowing. C) If the Moon had an atmosphere, then humans wouldn't have been able to land on its surface. D) If the Moon had an atmosphere, then Earth couldn't have an atmosphere since the two atmospheres would interact with each other. E) Only in the absence of an atmosphere would the moon be able to reflect light from the Sun, thereby making it visible from Earth.

A

How many Earth years does it take Pluto to orbit the Sun? A.248 B.0.2 C.0.5 D.2012 E.10

A

How many Earth years does it take Pluto to orbit the Sun? A) 248 B) 0.2 C) 10 D) 0.5 E) 2012

A

A planet is in orbit around the Sun with a period of 5 years. What is the semimajor axis of its orbit (average distance from the Sun) in AU? Use P2 = a3 to estimate. A.1.24 AU B.8.65 AU C.123 AU D.25.0 AU E.2.92 AU

E

The Sun is at one focus of the elliptical orbit of the Earth around the Sun. What is at the other focus? A.Nothing. B.Jupiter. C.The Moon. D.The Earth. E.Mars.

A

To a space probe near the surface of Mercury, how would the sky appear? A) black, both during the day and at night B) black during the day and blue at night C) blue during the day and black at night, like Earth D) blue all the time since Mercury is so close to the Sun E) pink during the day and black at night

A

What is the main constituent of the atmosphere of Venus? A) carbon dioxide B) helium C) oxygen D) nitrogen E) hydrogen

A

Which has the lowest average density? A.Saturn B.Venus C.Mars D.Mercury E.the Moon

A

Which is smallest? A.Saturn's moon Encledus B.Saturn's moon Titan C.Jupiter's moon Ganymede D.Earth E.Mercury

A

Which of the following are the jovian planets? A.Jupiter, Saturn, Uranus, Neptune B.Mercury, Jupiter, and Saturn C.Uranus, Neptune, and Pluto D.Mercury, Venus, Earth, Mars E.Earth, Mars, Jupiter, Saturn

A

Which of the following does NOT happen to any of the material in the protoplanetary disk? A.it is sucked in to a black hole at the center of our Solar System B.it gets incorporated into the star at the center, the Sun C.it is accreted onto planets in the Solar System D.it first falls into small irregularities and later these clumps grow into larger structures E.it is blown out by the solar wind

A

Which of the following is an accurate description of the KT event? A) Living forms, notably the dominant ones such as the dinosaurs, were driven to extinction by the aftermath of the impact more than the impact itself. B) The extinction of dinosaurs happened because of the asteroid hitting directly on their head. C) The KT impact was the result of a collision of a previous moon of Earth with the Earth and led to extinction of many species. D) The KT impact produced Earth's moon. E) The impacting asteroid hit the Earth at the region that had the maximum human population.

A

Which of the following is true? A) The Earth moves slower in its orbit when it is farthest from the Sun. B) The Earth moves slower in its orbit when it is closer to the Sun. C) Jupiter takes longer to pass once around the Sun than the most distant planet, Pluto, does. D) The Earth's orbit around the Sun is a perfect circle. E) Mercury takes more than 1 year to orbit the Sun. (It is the closest planet to the Sun.)

A

Which of the following statements is FALSE? A) In our solar system, only Saturn has a ring system. B) The surface of Europa is completely covered by water ice. C) The planet Uranus is blue-green and virtually featureless. D) Io has a noticeable lack of impact craters on its surface. E) Much water ice is found on Saturn's moons.

A

Which planet is able to retain the largest (by radius and by volume) atmosphere? A. Jupiter B. Venus C. Earth D. Mercury E. Mars

A

A comet's nucleus is composed of: A) just iron B) dust, dry ice, and water ice. C) iron and silicates. D) methane and hydrocarbons E) gases, including mostly hydrogen and helium.

B

A planet is in orbit around the Sun. The semimajor axis of the orbit is 5 Astronomical Units (AU). Use P2 = a3 to calculate the period of the orbit in years. A) 135 years B) 11.2 years C) 0.2 years D) 125 years E) 5 years

B

How do most craters on moons form? A.by tectonic activity B.impact of asteroids C.running water D.by volcanic activity E.earthquakes

B

How many Earth years does it take Uranus to orbit the Sun? A.0.48 B.84 C.1 D.2.4 E.0.27

B

Planet A has an orbit with a semi-major axis of 2 Astronomical Units. Planet B has an orbit with a semi-major axis of 8 Astronomical Units. How does the orbital period compare between the two planets? Use P2 = a3 to estimate. A) Planet B has an orbital period 4 times longer than Planet A. B) Planet B has an orbital period 8 times longer than Planet A. C) Planet B has an orbital period 64 times shorter than Planet A. D) Planet B has an orbital period 64 times longer than Planet A. E) Planet B has an orbital period 4 times shorter than Planet A.

B

The Greenhouse effect : A) cannot exist on Venus because Venus has no atmosphere . B) is larger on Venus than on Earth. C) is sometimes larger on Venus than on Earth and sometimes smaller. D) is smaller on Venus than on Earth. E) on Venus leads to a lower temperature on Venus's surface than it would have otherwise.

B

Based on what we see in panoramic images, why do you think Moon is likely NOT to have an atmosphere? A.Only in the absence of an atmosphere would the moon be able to reflect light from the Sun, thereby making it visible from Earth. B.If the Moon had an atmosphere, the light from the Sun would heat the atoms in the atmosphere and the atmosphere would start glowing. C.If the Moon had an atmosphere, then humans wouldn't have been able to land on its surface. D.If the Moon had an atmosphere, then Earth couldn't have an atmosphere since the two atmospheres would interact with each other. E.If the Moon had an atmosphere, it would scatter sunlight in all directions and the lunar sky would look bright.

E

Craters on Venus: A.are much smaller in size than those on Earth, Moon, and Mars. B.are caused by erosion due to liquid water, not to impact of comets and asteroids. C.are never apparent because of the large amounts of volcanic activity. D.are much larger in size than those on Earth, Moon, and Mars. E.are about the same in size and structure to those on Earth, Moon, and Mars.

E

How many Earth years does it take Uranus to orbit the Sun? A) 1 B) 2.4 C) 0.27 D) 0.48 E) 84

E

Mercury has a mass that is 1/20th the mass of the Earth and a radius that is 1/3 the radius of Earth. Compare the force of gravity on Mercury's surface to that on the surface of Earth using the proportional relationship F is proportional to M/R2. A) Gravity on Mercury is 30 times stronger than on Earth. B) Gravity on Mercury is equal to gravity on Earth. C) Gravity on Mercury is 3 times stronger than on Earth. D) Gravity on Mercury is 3/20th as strong as on Earth. E) Gravity on Mercury is 9/20ths as strong as on Earth.

E

Several of the tributary canyons of the Valles Marineris on Mars are thought to be formed: A.when water coming from the volcanoes started flowing through the planet. B.from impacts with irregularly shaped comets and asteroids. C.from a chemical reaction between iron oxide and water. D.when strong wind currents along the equatorial region started blowing out sand. E.when ground water, escaping from opening cracks, flowed and cut a channel through the surface beneath.

E

Several of the tributary canyons of the Valles Marineris on Mars are thought to be formed: A) when water coming from the volcanoes started flowing through the planet. B) from a chemical reaction between iron oxide and water. C) from impacts with irregularly shaped comets and asteroids. D) when strong wind currents along the equatorial region started blowing out sand. E) when ground water, escaping from opening cracks flowed cutting a channel through the surface beneath.

E

The deepest canyon in the solar system is on the planet: A.Earth B.Jupiter C.Mercury D.Venus E.Mars

E

The escape velocity needed for an atom in the atmosphere of a planet to escape the gravitational pull of the planet is larger if: A.the temperature of the gas in the atmosphere is higher B.the mass of the atom is smaller C.the radius of the planet is larger D.the planet is farther from the Sun E.the mass of the planet is larger

E

The planets of the solar system were formed: A.by the accumulation of many comets B.by a near collision between the Sun and a nearby star C.by the collapse of a single higher mass star into a black hole D.as condensations/accretions of hot gases ejected from the Sun E.as individual condensation/accretion centers in a rotating solar nebula

E

What chemical compound(s) give(s) Uranus its blue color? A) liquid water B) hydrogen and helium C) iron oxide D) ozone E) methane

E

What object is this? A.the planet Uranus B.the planet Jupiter C.the dwarf planet Pluto D.Saturn's moon Titan E.the planet Neptune

E

Which characterizes the magnetosphere/strength of magnetic fields on Jupiter? A.the same as on Earth so that it has aurora B.completely absent C.weaker than that on Earth, but it still has aurora D.a thousand times that on Earth so that it cannot have aurora E.ten times stronger than Earth so that it has aurora

E

Which fact about Mars is true? A.There are no volcanoes on Mars. B.No spacecraft has ever landed on Mars. C.There was never water on the surface of Mars. D.It is always warmer than freezing on Mars surface. E.Mars has a thinner atmosphere than Earth does.

E

Which fact about Mars is true? A) There are no volcanoes on Mars. B) No spacecraft has ever landed on Mars. C) There was never water on the surface of Mars. D) It is always warmer than freezing on Mars's surface. E) Mars has a thinner atmosphere than Earth does.

E

Which feature of Neptune is most responsible for its blue color? A) auroral activity due to its strong magnetic field B) excess energy emitted by the interior C) large oceans covering most of the surface D) winds blowing at speeds almost that of sound E) methane in its atmosphere

E

Which is largest? A) Pluto B) Mercury C) Saturn's moon Iapetus D) Saturn's moon Mimas E) Jupiter's moon Ganymede

E

Which of the following does not have a significant atmosphere? A) Jupiter's moon Callisto B) Venus C) Saturn's moon Titan D) Jupiter E) Earth's Moon

E

Which of the following moons has no craters because they are wiped out by movement of ice on the surface? A) Venus's moon Ganymede B) Callisto, in orbit around Jupiter C) Earth's Moon D) Miranda, in orbit around Uranus E) Europa, in orbit around Jupiter

E

Which of the following would be an accurate description of the Great Red Spot? A.The red spot has formed at the interface between two adjacent bands. B.The red spot is a solid feature on the gaseous surface of Jupiter. C.The red spot rotates like a whirlpool. D.All of the above. E.Both A and C.

E

Which feature of Neptune is most responsible for its blue color? A.auroral activity due to its strong magnetic field B.large oceans covering most of the surface C.methane in its atmosphere D.excess energy emitted by the interior E.winds blowing at speeds almost that of sound

c

Where do mountains like the Himalayas come from? A.The Earth is made of molten rock and metals, and regions with opposite electrical charges attract each other and form peaks. B.The Earth formed by an irregular processes and that is just the way that it was shaped when the molten rock cooled into place. C.The Moon's gravity pulls some layers up into mountain ranges. D.In some locations, plates of rock on the planet's surface press together and the plates rise together. E.Rain of debris from meteorites and comets falls in some places more than others, and builds up into mountains.

d