which of the following statements about comets is true?which of the following statements about comets is true?

its atmosphere traps much of the incoming solar energy. WebA) There are about 1 million known asteroids in the solar system. 22) Primitive meteorites can be distinguished from other meteorites and terrestrial rocks because they E) all of the above, Where did comets that are now in the Kuiper belt originally form? D) by determining how far from the Sun it is A) It blasted the comet apart, thus preventing a potential Earth collision. A video of the sunset How can we determine an asteroid's reflectivity? B) Most of the trillions of comets in our solar system have tails. C) It was the first direct proof that impacts really occur. E) the period of an orbiting asteroid would be the same as Jupiter's orbital period. D) orbital resonances with Jupiter. 17) Why aren't small asteroids spherical in shape? A) solar system debris

(a) List at least three important characteristics required of a material to be used for this application. B) about 80 years ago B) Small asteroids have odd shapes because they were all chipped off larger objects. (5) Saturn's rings would not be broken into rings and gaps. Click the card to flip . C) Only asteroids collide with Earth. B) A meteorite usually has a high metal content. What is the name of the largest known Kuiper Belt Object? The isotopic ratios in meteorites differ from terrestrial rocks and they may also have a higher abundance of rare elements such as iridium than terrestrial rocks. A piece of rock that is essentially unchanged since it first condensed and accreted in the solar nebula some 4.6 billion years ago. C) Most of the trillions of comets in our solar system have tails.

D) Large asteroids became spherical because many small collisions chipped off pieces until only a sphere was left, 18) What is a meteorite? Which statement is not thought to be true of all comets in our solar system? PLZ HLEP ASAP. A) about 30 years ago Comets are mostly made up of rock. E) It is allergic to sunlight. B) discovery of seasonal atmosphere, similar to comets It is made of planetesimals that formed beyond Neptune's orbit and never accreted to form a planet. A) Kuiper belt comets B) Pluto is regarded by many to be a planet. A) a large member of the Kuiper belt. How would the appearance of a comet in our inner solar system be different? Assume you pulled your hand and the end of the st ring upward in the preceding example. D) inside of Jupiter's orbit A, B, E, F We expect a scientific theory to be able to make predictions that can be tested. Comets are mostly made up of rock. A) the cores of asteroids. Why aren't small asteroids spherical in shape? B) Comets are balls of ice and dust.

C) No, because the two planets have an orbital resonance that prevents them from colliding. C) Pluto's orbit never comes anywhere close to Neptune's orbit. There is no vegetation to hide them and snow is rare, so they are remain visible for a long time.

Oort-cloud comets are so far from the Sun that the gravity of neighboring stars can alter their orbits. E) All of the above, Which of the following are evidence for an asteroid impact being the cause of the extinction of the dinosaurs 65 million years ago as well as 75% of all species alive at the time)?

C) It would not have a nucleus. C. Most comets have a circular orbit that keeps them in the space between Mars and Jupiter. B) see the gaps via stellar occultation. Which of the following statements about comets is true? The birthplace of comets is a cloud of icy, dusty aggregates beyond the solar system. E) Some known Kuiper-belt objects are hundreds of kilometers across. E) Comet sizes are unknown because their tails obscure the nucleus. D) Meteorites contain rare elements, such as iridium, that terrestrial rocks do not. A) in the asteroid belt D) chunks of the core of a larger asteroid that was shattered by a collision. In the asteroid impact theory of the extinction of the dinosaurs some 65 million years ago, the dinosaurs (and over half of all the other species on Earth at that time) died off largely because B) pieces of comets rather than of asteroids. Why aren't small asteroids spherical in shape? C) Earth and other planets would have more large craters.

D) resemble the composition of Earth's mantle. Most comets have elliptical orbits with periods around one hundred years. C) a streak of light caused by a small particle from space burning up in Earth's atmosphere D) about once every hundred million years. C) The conservation of the angular momentum of the tail keeps it always pointing away from the Sun. 16) If we know the size of an asteroid, we can determine its density by most are unchanged since their formation in the solar nebula How do asteroids differ from comets?

Where did comets that are now in the Oort cloud originally form? C) about 4,000 5) Why do asteroids and comets differ in composition? A) Pluto has a comet-like composition and density. in the formation of the solar system.

Halley's comet is named after the English scientist Edmund Halley (1656-1742) because D) within the solar nebula, but far outside the orbit of Pluto gases to form the solar nebula. A) straight behind the comet in its orbit A) by imaging with the Hubble Space Telescope A) discovered it. Weegy: Isaac Newton is the scientist who develops the theory of gravitation and used it to explain the orbits of celestial bodies. E) the jets of gas. C) an extrasolar planetary system.

Why was the Shoemaker-Levy 9 impact so important to astronomers? What are three advantages of biodiesel over petroleum-based diesel fuel?

E) There are about 1 million known asteroids in the solar system. B. Comets are mostly made up of rock. According to the nebular theory, how did the Kuiper belt form?

B) It dredged up material that gave us our first direct look at Jupiter's interior composition. What characteristic distinguishes a meteorite from a terrestrial rock? Most comets have elliptical orbits with periods around one hundred years. WebQuestion: QUESTION 12 Which of the following statements about comets is not true?

Whats the purpose of the scope resolution operator? B) looking for brightness variations as it rotates. B) Comets are balls of ice and dust. Rather than being a planet, Pluto is really just a large member of. Which of the following real things in our solar system would look most like such science fiction dangers? WebThe Sun generates energy through fusion of hydrogen into helium. Comets are mostly made up of rock. They are usually very easy to see but as they approach the Sun, these particles condense and become much harder to see B. Comets are mostly made up of rock. A) the largest known asteroid B) The strength of gravity on small asteroids is less than the strength of the rock. Which of the following is furthest from the Sun? D) resemble the composition of Earth's mantle. 2) What do asteroids and comets have in common? C) a very small jovian planet. B) come from the asteroid belt. What do astronomers mean when they refer to "gaps" in the asteroid belt between Mars and Jupiter? A video of a shooting star 38) What is Charon?

They are usually very hard to see, but as they approach the Sun, these particles heat up and become much easier to see. What is the size of the largest asteroid? C) Most of the trillions of comets in our solar system have tails. C) the largest known comet D) a trillion. Draw several strike-dip symbols on Figure 6.14 that would be Which of the following is not a piece of evidence supporting the idea that an impact caused the mass extinction that occurred 65 million years ago? Meteorites are usually covered with a dark, pitted crust from their fiery passage through the atmosphere. Choose all that apply. When we see a meteor shower, it means that C) contain a lot of iron and were used by humans to make iron tools. C) asteroids of the asteroid belt WebWhich of the following statements about comets are true? B) the period of an orbiting asteroid would be the same as Mars's orbital period. According to current science, which of the following statements must be true? E) Pluto is too far away for its surface to be mapped. c) Asteroids and comets are made of different materials than any planets. Answers: in the formation of the solar system.

D) the dust tail B) Gravitational tugs from Jupiter prevented material from collecting together to form a planet. WebWhich of the following statements about Pluto is true? What is Charon? D) are Trojan comets. 29) What part of a comet points most directly away from the Sun?

Why is the Kuiper belt flat but the Oort cloud spherical? The number of comets in the Oort cloud is probably about True

E. There are vast numbers of asteroids and comets. What is your reasoning? D) Only asteroids collide with Earth.

B) Comets are balls of ice and dust. B) Radiation pressure from the Sun's light pushes the ions away. Why did astronomers identify Pluto as a planet from its discovery? B) Jupiter's gravitational tugs keep them there.

Why aren't small asteroids spherical in shape? B) Pluto is regarded by many to be a planet. WebAnswers: Comets are thought to be dirty snowballs. E) All asteroids lie in the asteroid belt between Mars and Jupiter. Weba) Asteroids and comets are much smaller than planets. How would the appearance of a comet in our inner solar system be different? A rock found on Earth that crashed down from space is called The birthplace of comets is a cloud of icy, dusty aggregates beyond the solar system. C) the impact that created the Moon's largest crater

Meteorites can come from A) near the jovian planets D) resemble the composition of Earth's mantle. A) one of the Galilean moons of Jupiter B) once every thousand years E) Comet sizes are unknown because their tails obscure the nucleus. A) It consists of objects that fragmented from the protosun during a catastrophic collision early B) Jupiter's gravitational tugs keep them there. C) know they are there theoretically, although we haven't detected them. Most are unchanged since their formation in the solar nebula. What part of a comet points most directly away from the Sun? C) he was the most famous astronomer alive in England during its appearance in 1758. WebThe Sun generates energy through fusion of hydrogen into helium. B) a comet that burns up in Earth's atmosphere Halley's comet is named after the English scientist Edmund Halley because he E) four, What is Eris? Comets are usually made up of ice, dust, and gas, meaning that options A and D are wrong. Which of the following statements about comets is true? D) actually don't know whether there really are gaps or not. b) It is the largest known object that is considered to be a dwarf planet. D. Comets rarely fall into an orbit around the Sun. True

D) They are kept in place by shepherding asteroids. Also, as a comet approaches the sun, its particles heat up so quickly that they don't have time to become liquid; they turn straight from solid to gas. billions of years ago from elements created in previously existing stars. Comets are usually made up of ice, dust, and gas, meaning that options A and D are wrong. What is the output of the following C++ code? WebWhich of the following statements about Pluto is true? A large impact could send huge quantities of dust into the stratosphere, where it would block out sunlight for several years. D) Grains of quartz formed under high pressure are found in a layer of clay that dates to 65 million years ago.

C) know they are there theoretically, although we haven't detected them. The tail of a comet consists of dust and evaporated ices. The birthplace of comets is a cloud of icy, dusty aggregates beyond the solar system. B) Its orbit is more inclined to the ecliptic plane. E) A and C. According to the nebular theory, how did the asteroid belt form? A.

orbits by encounters with the jovian planets. C) It is a little less than half the diameter of our Moon.

C) inside Jupiter's orbit d) Its mass is a little less than Earth's mass. B. Comets are mostly made up of rock. What is the typical size of a comet's nucleus? B) as complex curving and looping lines C) Most of the trillions of comets in our solar system have tails.

It would have only one tail instead of two. C) a billion. A) Comets always have tails. A typical meteor is created by a particle about the size of a C) the largest known comet D) Pluto's largest moon E) The temperature in this portion of the solar nebula was just right to prevent rock from sticking together. D) No, because Pluto's orbit is completely outside Neptune's orbit. A) It is about the size of a terrestrial planet. B) cometary fragment D) beyond the orbit of Neptune. A) The solar wind electromagnetically "blows" the ions directly away from the Sun. Gravitational tugs from Jupiter prevented material from collecting together to form a planet. B) radiation from iridium in the asteroid caused the dinosaurs to die of cancer. A) Pluto's composition appears to match that of other known Kuiper belt comets. C) perpendicular to the ecliptic plane WebA) Only asteroids collide with Earth. E) boulder- size particle from an asteroid. Why do asteroids and comets differ in composition? A) Pluto's orbit is completely outside Neptune's orbit. E) in the Oort cloud. E) There are about 1 million known asteroids in the solar system. C) an extrasolar planet ejected by another solar system and captured by ours

What do astronomers mean when they refer to "gaps" in the asteroid belt between Mars and Jupiter? D) It confirmed our theory of solar system formation. 6) What is the size of the largest asteroid? D) the flash that occurs when a speeding rock from space hits the ground, How can we determine the reflectivity of an asteroid? It is made of planetesimals that formed beyond Neptune's orbit and never accreted to form a planet. WebA) Only asteroids collide with Earth. A video of the 2 Martian moons crossing overhead It formed outside of the frost line in the solar nebula. E) iron-rich and processed. This makes them very visible when they come near the sun. D) within the solar nebula, but far outside the orbit of Pluto What can we conclude? WebComets are balls of ice and dust. A) Fossilized dinosaur bones contain fragments of rock from the impact. E) All asteroids lie in the asteroid belt between Mars and Jupiter. A. Comets are mostly made up of dust particles, frozen water and frozen gases. Which statement about asteroids is not true? A rocky leftover planetesimal orbiting the Sun is, An icy leftover planetesimal orbiting the Sun is. 1) Which of the following statements about comets and asteroids is true? E) meteoroid, 20) A typical shooting star in a meteor shower is caused by a ________ entering Earth's atmosphere. WebQuestion: QUESTION 12 Which of the following statements about comets is not true? D) one of the Galilean moons of Jupiter However, the high reflectivity can be explained by its large size; as volatile ices sublimate when Pluto approaches the Sun, Pluto's gravity holds them until they refreeze onto the surface. (6) The asteroid belt would not have gaps. Answers: o a Comets are thought to be dirty snowballs. Click the card to flip . B) the coma.

Answers: Our model of the surface features of Venus was obtained by B) the largest known Kuiper Belt object C) radiation from iridium in the asteroid caused the dinosaurs to die of cancer. B) was the first to see it in 1682. B) an asteroid. Why won't Pluto collide with Neptune? D) All asteroids lie in the asteroid belt between Mars and Jupiter. B. Comets have very elliptical orbits that usually take them far beyond the orbit of Pluto, but also take them closer to the Sun than Earth. C) be one of the first three discoverers who report it to the International Astronomical Union (IAU). A) Many but not all orbit the Sun in the asteroid belt. Hope this helps! The birthplace of comets is a cloud of icy, dusty aggregates beyond the solar system. Barium metal has a body-centered cubic lattice with all atoms at lattice points; its density is 3.51g2cm33.51 \mathrm{~g}^2 \mathrm{~cm}^33.51g2cm3. They are usually very easy to see but as they approach the Sun, these particles condense and become much harder to see B. Comets are mostly made up of rock. C) boulder- size particle from a comet WebQuestion: QUESTION 12 Which of the following statements about comets is not true? C) pea-size particle from an asteroid D) 1 meter A) as resolved disks, like the planets C) chunks of a larger asteroid that was shattered by a collision. Comets are balls of ice and dust. A) comparing its reflectivity to the amount of light it reflects. Comets are usually made up of ice, dust, and gas, meaning that options A and D are wrong.

E) Sizes are unknown because the nucleus is obscured by the coma. powerful Earth-based telescopes. a) It is orbited by only one moon. C) Gravitational tugs from Jupiter prevented material from collecting together to form a planet. Will Pluto eventually collide with Neptune? B) Some are more like loosely bound piles of rubble than solid chunks of rock. B) Comets are balls of ice and dust. A) 1 trillion. When a comet passes near the Sun, part of it takes on the appearance of a large, bright ball from which the tail extends. What evidence led astronomers to conclude that the Oort cloud is a spherical distribution of comets? A, B, E, F We expect a scientific theory to be able to make predictions that can be tested. Suppose that large jovian planets had never formed in our solar system. According to the nebular theory, how did the Oort cloud form? Their orbits have random inclinations with respect to the ecliptic plane. E. There are vast numbers of asteroids and comets. C) A prototype asteroid defense system was being tested nearby. C) about the mass of Earth. Comets have very elliptical orbits that usually take them far beyond the orbit of Pluto, but also take them closer to the Sun than Earth. D) Only asteroids collide with Earth. B) the impact thought to have wiped out the dinosaurs A) carbon-rich and primitive. When a comet passes near the Sun, part of it takes on the appearance of a large, bright ball from which the tail extends.

B) It hit Earth at an oblique angle and thus exploded high in the air. d) Asteroids and comets are only found at much greater distances from the Sun than planets. A) It is material left over from the interstellar cloud that never contracted with the rest of the WebA) There are about 1 million known asteroids in the solar system. B) a million. A) It is made mostly of ices.

Most are unchanged since their formation in the solar nebula. Many possible answers; without orbital resonances: (1) The asteroids might have accreted into a single planet between Mars and Jupiter. 11) We know that there are large gaps in the average distances of asteroids from the Sun (within the asteroid belt) because we D) Actually, a collision of the two is inevitable within the next billion years. C) the jets of gas E) There are about 1 million known asteroids in the solar system. Column B B) Pluto's orbit is completely inside Neptune's orbit. most are unchanged since their formation in the solar nebula How do asteroids differ from comets? Answers: C) Mars.

3) A rocky leftover planetesimal orbiting the Sun is an asteroid.

What do asteroids and comets have in common? C) a billion. They are usually very easy to see but as they approach the Sun the rock condenses and becomes much harder to see. 3) A rocky leftover planetesimal orbiting the Sun is, 4) An icy leftover planetesimal orbiting the Sun is. Why won't Pluto collide with Neptune? C) pea-size particle from an asteroid Classify\text{\red{Classify}}Classify Which two domains of life contain In your own words, describe the manufacture of ammonia from natural gas, steam, and air. 7) How does the largest asteroid, Ceres, compare in size to other solar system worlds? E) There are about 1 million known asteroids in the solar system. When we see a meteor shower, it means that ________.

D) If we could put all the asteroids together, they would make an object about the size of Earth. Effects propagate through the food chain, leading to death and extinction on an enormous scale. C) All asteroids lie in the asteroid belt between Mars and Jupiter. only prokaryotes? Why are most meteorites found in Antarctica? D) about the size of Earth's moon. E) There are about 1 million known asteroids in the solar system. 12) The large gaps in the asteroid belt (often called Kirkwood gaps) are caused by E) in ancient history. D) All asteroids lie in the asteroid belt between Mars and Jupiter. D) the extinction of any species of plant or animal that has mass. In what ways is Pluto like other Kuiper-belt objects? D) Comets are balls of ice and dust. They turn the spacecraft away from the Sun E) have plotted distributions of the orbital radii of the asteroids. B) by measuring its mass and radius Click the card to flip . 5) Why do asteroids and comets differ in composition? C) between the orbits of Jupiter and Neptune cameras on the fly-by Voyager probes. A) Pluto's moon A comets tail points away from the sun Comet tails are caused by evaporating water ice and other ices Comets only have tails when they are in the inner solar system Match each method of heat transfer to its description B) was not surprising, because other Kuiper belt objects approaching the size of Pluto had already been discovered. Abe Mizrahi, Edward E. Prather, Gina Brissenden, Jeff P. Adams, Jeffrey O. Bennett, Mark Voit, Megan O. Donahue, Nicholas O. Schneider. At what distance from Titan should the gravitational pull of Titan just balance the gravitational pull of Saturn? A) pea-size particle from a comet A) near the jovian planets WebA) Only asteroids collide with Earth. C) come from the Oort cloud. A) see the gaps through telescopes. Choose all that apply. Falling stars and shooting stars are simply other names for meteors. Briefly describe how an impact could lead to a mass extinction. orbits by encounters with the jovian planets. A. E) a moon of Neptune.

A) a thousand. D) chunks of rock chipped off the planet Mercury. B) outside Neptune's orbit 23) Most meteorites are Jupiter. C) Large asteroids were once molten and therefore became spherical, but small asteroids were never molten. B) Comets are balls of ice and dust.

A rocky leftover planetesimal orbiting the Sun is, An icy leftover planetesimal orbiting the Sun is. A) boulder-size particle from an asteroid A) A gap is located at an average orbital distance, and asteroid orbits often have large eccentricities. 28) When do comets generally begin to form a tail? Remnants of asteroids or comets that survive the trip through Earth's atmosphere to strike the surface are called, The surface temperature of Venus is so high because. B) once in Earth's history C) between the orbits of Jupiter and Neptune A) a fragment of an asteroid from the solar system that has fallen to Earth's surface WebThe Sun generates energy through fusion of hydrogen into helium. (b) Compare the relative properties and cost of three ceramic materials. B) dust injected into the stratosphere from the impact absorbed visible light from the Sun, causing global temperatures to plummet. Weegy: Isaac Newton is the scientist who develops the theory of gravitation and used it to explain the orbits of celestial bodies. c) Asteroids and comets are made of different materials than any planets. D) It is made of planetesimals between the orbits of Mars and Jupiter that never formed into a D) a small moon that orbits one of the giant planets C) There would be a large empty region in our solar system between the orbit of Mars and the Kuiper belt. Also, as a comet approaches the sun, its particles heat up so quickly that they don't have time to become liquid; they turn straight from solid to gas. B) Comets are balls of ice and dust. E) It was the first event in modern history that was brighter than the full moon in the sky. A) comparing its reflectivity to the amount of light it reflects. A, B, E, F We expect a scientific theory to be able to make predictions that can be tested.

c) It has more in common with comets in the Kuiper belt than it does with terrestrial planets like Earth. appropriate for a dome and a basin, respectively. E) the moon system around Neptune. C) Your meteorite is a fragment of an object from the Kuiper belt. The brightness of an asteroid depends on its size, distance, and reflectivity. B) pea. An icy leftover planetesimal orbiting the Sun is called. A) A meteorite is usually covered with a dark crust from burning in Earth's atmosphere. B) Meteorites contain rare elements, such as iridium, that terrestrial rocks do not. 33) Comets with extremely elliptical orbits, like comets Hyakutake and Hale-Bopp, A) come from the asteroid belt. C) 100,000.

D) the plasma tail E) It landed safely on the surface of the comet and returned material to Earth. D) about 2000 years ago C) about once every thousand years 41) Why was the Shoemaker-Levy 9 impact so important to astronomers? D) Pluto. E) There are about 1 million known asteroids in the solar system. Draw a free-body diagram of point BBB for m=40kgm= 40\ \text{kg}m=40kg. D) was the most famous astronomer in England during its appearance. B. Comets have very elliptical orbits that usually take them far beyond the orbit of Pluto, but also take them closer to the Sun than Earth. B) A planet once formed here, but it was broken apart by a catastrophic collision. C) a type of meteorite that is usually made mostly of high-density metals

What characteristic distinguishes a meteorite from a terrestrial rock? C) a buried crater more than 100 km across in the Gulf of Mexico B) the cores of asteroids. WebComets are balls of ice and dust. E) the dust tail. A) the nucleus B) discovery of seasonal atmosphere, similar to comets D) a comet in the Kuiper belt Most comets have a circular orbit that keeps them in the space between Mars and Jupiter. B) Pluto has a more eccentric orbit than other planets.

B) boulder-size particle from a comet Which of the following statements about comets and asteroids is true? WebA) There are about 1 million known asteroids in the solar system. Which of the following statements is not true? B) Objects in the Kuiper belt are made mostly of rock and metal. One of the following planets is denser than the others A) discovery of the Kuiper Belt E) spectroscopic imaging. B) about 4 billion A) It came from the Oort cloud. B) inside Jupiter's orbit In what way(s) has Pluto long been known to be different from the planets? A.