uestion 1a of 10 ( 2 General Properties of Gas Giants 147170 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do the gas giants have many moons? Choice Feedback A. They are located within an asteroid belt. How might an asteroid become a moon? *B. They are large and so they have a lot of gravity. That's correct! C. They have rings of particles that eventually form moons. A force creates rings and moons around the gas giants. D. Violent surface conditions emit rocks that form moons. A force creates rings and moons around the gas giants. Global Incorrect Feedback The correct answer is: They are large and so they have a lot of gravity. The gas giants are large and have a lot of gravity to hold moons in orbit around them. -------------------------------------------------------------------------------- Question 1b of 10 ( 2 General Properties of Gas Giants 249298 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What aspect of the gas giants has the biggest effect on their rings and satellites? Choice Feedback A. Their gaseous composition This does not affect their satellites. *B. Their gravity That's correct! C. Their distance from the sun This does not affect their satellites. D. Their rate of spinning This does not affect their satellites. Global Incorrect Feedback The correct answer is: Their gravity. The gas giants are large and have a lot of gravity to hold moons and rings in orbit around them. -------------------------------------------------------------------------------- Question 1c of 10 ( 2 General Properties of Gas Giants 249326 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do the gas giants have more moons than the terrestrial planets? Choice Feedback A. They are located within an asteroid belt. How might an asteroid become a moon? *B. They are larger and so they have more gravity. That's correct! C. They are made of ice. A force creates rings and moons around the gas giants. D. They do not have solid surfaces. A force creates rings and moons around the gas giants. Global Incorrect Feedback The correct answer is: They are larger and so they have more gravity. The gas giants are much larger than the terrestrial planets and have much more gravity to hold moons in orbit around them. -------------------------------------------------------------------------------- Question 2a of 10 ( 2 General Properties of Gas Giants 147171 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which gases are found in the atmospheres of the gas giants? Choice Feedback A. Carbon dioxide and hydrogen Their atmospheres do contain hydrogen. B. Hydrogen and nitrogen Their atmospheres do contain hydrogen. *C. Hydrogren and helium That's correct! D. Nitrogen and oxygen Earth's atmosphere is rich in nitrogen and oxygen! E. Carbon dioxide and helium Their atmospheres do contain helium. Global Incorrect Feedback The correct answer is: Hydrogen and helium. The atmosphere of the gas giants is rich in hydrogen and helium. -------------------------------------------------------------------------------- Question 2b of 10 ( 2 General Properties of Gas Giants 249302 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which gas is found in high percentages in the atmosphere in all of the gas giants? Choice Feedback A. Carbon dioxide This is not found in a high percentage. B. Oxygen This is not found in a high percentage. *C. Hydrogen That's correct! D. Nitrogen This is not found in a high percentage. E. Carbon monoxide This is not found in a high percentage. Global Incorrect Feedback The correct answer is: Hydrogen. The atmosphere of the gas giants is rich in hydrogen and helium. -------------------------------------------------------------------------------- Question 2c of 10 ( 2 General Properties of Gas Giants 249303 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: The atmosphere of the gas giants is usually made up mostly of hydrogen and ______. Choice Feedback A. ethane This is not one of the two largest parts of the atmosphere. B. methane This is not one of the two largest parts of the atmosphere. *C. helium That's correct! D. nitrogen This is not one of the two largest parts of the atmosphere. E. carbon dioxide This is not one of the two largest parts of the atmosphere. Global Incorrect Feedback The correct answer is: helium. The atmosphere of the gas giants is rich in hydrogen and helium. -------------------------------------------------------------------------------- Question 3a of 10 ( 2 Differentiating the Gas Giants 147172 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: Jupiter Question: Of all the gas giants, _____ has the shortest period of revolution. Attempt Incorrect Feedback 1st Planets rotate on their axes and revolve around the sun. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: Jupiter. Of all the gas giants, Jupiter is closest to the sun and has the shortest period of revolution. -------------------------------------------------------------------------------- Question 3b of 10 ( 2 Differentiating the Gas Giants 249304 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: Uranus Question: Of all the gas giants, the only one that spins on its side is _______. Attempt Incorrect Feedback 1st It is thought to have collided with something, altering its spin. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: Uranus. Uranus is the only gas giant that spins on its side. This is thought to be due to a collision it had long ago. -------------------------------------------------------------------------------- Question 3c of 10 ( 2 Differentiating the Gas Giants 249305 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: Neptune Question: Of all the gas giants, _____ has the longest period of revolution. Attempt Incorrect Feedback 1st Planets rotate on their axes and revolve around the sun. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: Neptune Of all the gas giants, Neptune is fuarthest from the sun and has the longest period of revolution. -------------------------------------------------------------------------------- Question 4a of 10 ( 2 Differentiating the Gas Giants 338095 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match each planet to the sentence that best describes it. Choice Text Correct Match Match Text A. Neptune D. It has over 60 satellites and rings, although none of its rings are visible. B. Uranus C. It has over 40 satellites, one of which is Titan. C. Saturn A. Astronomers predicted its existence by observing the effects of its gravity. D. Jupiter B. Its atmosphere is full of methane clouds. Attempt Incorrect Feedback 1st That's not a correct match. The Cassini spacecraft provided close-up images of the Jupiter, the largest planet. Correct Feedback Those are correct matches! Global Incorrect Feedback The correct order is: Saturn has over 40 satellites, one of which is Titan. Astronomers predicted the existence of Neptune by observing the effects of its gravity on Uranus. The atmosphere of Uranus is full of methane clouds. Jupiter has over 60 satellites and rings, although none of its rings are visible. -------------------------------------------------------------------------------- Question 4b of 10 ( 2 Differentiating the Gas Giants 338096 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match each planet to the sentence that best describes it. Choice Text Correct Match Match Text A. Neptune D. It has a giant storm three times the width of Earth. B. Uranus C. It is most well-known for its rings. C. Saturn A. It has the strongest winds in the solar system. D. Jupiter B. Its orbit was used to predict the existence of another planet. Attempt Incorrect Feedback 1st That's not a correct match. The Cassini spacecraft provided close-up images of the Jupiter, the largest planet. Correct Feedback Those are correct matches! Global Incorrect Feedback The correct matches are: Saturn is most well-known for its rings. Neptune has the strongest winds in the solar system. The orbit of Uranus was used to predict the existence of Neptune. Jupiter has the giant storm that is larger than Earth. -------------------------------------------------------------------------------- Question 4c of 10 ( 2 Differentiating the Gas Giants 338097 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match each planet to the sentence that best describes it. Choice Text Correct Match Match Text A. Neptune D. It is the largest gas giant. B. Uranus C. It has the "Shepherd Moons." C. Saturn A. It is sometimes farther from the sun than Pluto. D. Jupiter B. It has seasons that last 20 years. Attempt Incorrect Feedback 1st That's not a correct match. The Cassini spacecraft provided close-up images of the Jupiter, the largest planet. Correct Feedback Those are correct matches! Global Incorrect Feedback The correct matches are: Saturn has the Shepherd Moons. Neptune is sometimes fuarther from the sun than Pluto. Uranus has seasons that last 20 years. Jupiter is the largest gas giant. -------------------------------------------------------------------------------- Question 5a of 10 ( 2 General Properties of Gas Giants 147174 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why are temperatures on the gas giants so low? Choice Feedback A. They do not have atmospheres. The gas giants have thick atmospheres due to their size and gravity. B. Gases do not retain heat energy as well as solids. Carbon dioxide causes the greenhouse effect on Earth and Venus. C. They rotate relatively quickly. The gas giants that rotate most quickly are also the warmest! *D. They are far from the sun. That's correct! Global Incorrect Feedback The correct answer is: They are far from the sun. Temperatures on the gas giants are so low because they are far from the sun and do not receive as much energy as the terrestrial planets. -------------------------------------------------------------------------------- Question 5b of 10 ( 2 General Properties of Gas Giants 249309 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What aspect of gas giants is most responsible for their low temperatures? Choice Feedback A. Their lack of atmosphere The gas giants have thick atmospheres due to their size and gravity. B. Their gaseous composition Carbon dioxide causes the greenhouse effect on Earth and Venus. C. Their speed of rotation The gas giants that rotate most quickly are also the warmest! *D. Their distance from the sun That's correct! Global Incorrect Feedback The correct answer is: Their distance from the sun. Temperatures on the gas giants are so low because they are far from the sun and do not receive as much energy as the terrestrial planets. -------------------------------------------------------------------------------- Question 5c of 10 ( 2 General Properties of Gas Giants 249310 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do gas giants generally have lower average temperatures than the terrestrial planets? Choice Feedback A. They do not have rocky cores. The lack of a rocky core does not affect their temperature. B. They feature the greenhouse effect. Carbon dioxide causes the greenhouse effect on Earth and Venus. C. They rotate more quickly. The gas giants that rotate most quickly are also the warmest! *D. They are farther from the sun. That's correct! Global Incorrect Feedback The correct answer is: They are far from the sun. Temperatures on the gas giants are lower because they are farther from the sun and do not receive as much energy as the terrestrial planets. -------------------------------------------------------------------------------- Question 6a of 10 ( 2 Pluto 147175 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of Pluto? Choice Feedback *A. Pluto is not always the planet farthest from the sun. That's correct! B. Pluto's orbit is almost perfectly round. Pluto's orbit is elliptical. C. Pluto does not revolve around the sun. Pluto is part of the solar system, and so it revolves around the sun. D. Pluto revolves around the sun but does not rotate. Pluto rotates, although it rotates more slowly than the gas giants. Global Incorrect Feedback The correct answer is: Pluto is not always the planet farthest from the sun. Eight percent of the time, Neptune is farthest from the sun. -------------------------------------------------------------------------------- Question 6b of 10 ( 2 Pluto 249311 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of Pluto? Choice Feedback *A. Pluto has a tilted orbit. That's correct! B. Pluto's orbit is the third longest. Pluto's orbit is elliptical. C. Pluto is considered a terrestrial planet. Pluto is no longer considered a planet. D. Pluto does not rotate around its axis. Pluto rotates, although it rotates more slowly than the gas giants. Global Incorrect Feedback The correct answer is: Pluto has a tilted orbit. Pluto's orbit is tilted, and is not on the same plane as the 8 planets. -------------------------------------------------------------------------------- Question 6c of 10 ( 2 Pluto 249312 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of Pluto? Choice Feedback *A. Pluto has a moon that is about half its size. That's correct! B. Pluto's orbit is shorter than Saturn's. Pluto's orbit is much longer than Saturn's. C. Pluto is only larger than Mercury. Pluto is not larger than Mercury. D. Pluto orbits the sun every 2.5 Earth years. Pluto orbits the sun every 248 Earth years. Global Incorrect Feedback The correct answer is: Pluto has a moon that is about half its size. -------------------------------------------------------------------------------- Question 7a of 10 ( 2 Satellites of Gas Giants 147176 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why are three of Saturn's satellites -- Atlas, Prometheus and Pandora -- called "shepherd moons"? Choice Feedback A. They cause intense winds on Saturn's surface. Neptune is the windiest planet. B. They speed up Saturn's rotation. A force holds the moons in orbit around Saturn. *C. They keep Saturn's rings in order. That's correct! D. They create rings around Saturn. The rings around Saturn are made of ice and rock. Global Incorrect Feedback The correct answer is: They keep Saturn's rings in order. Atlas, Prometheus and Pandora are called "shepherd moons" because they keep Saturn's rings in order. -------------------------------------------------------------------------------- Question 7b of 10 ( 2 Satellites of Gas Giants 249313 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of Saturn's moons has an atmosphere that is most like Earth's? Choice Feedback A. Pandora Pandora is one of the Shepherd Moons. B. Atlas Atlas is one of the Shepherd Moons. *C. Titan That's correct! D. Europa This is a moon of Jupiter, not Saturn. Global Incorrect Feedback The correct answer is: Titan -------------------------------------------------------------------------------- Question 7c of 10 ( 2 Satellites of Gas Giants 249314 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Approximately how many moons does Saturn have? Choice Feedback A. 2 It has more than this. B. 20 It has more than this. *C. 46 That's correct! D. 75 It has fewer than this. Global Incorrect Feedback The correct answer is: 46 Saturn has at least 46 moons, and maybe more. -------------------------------------------------------------------------------- Question 8a of 10 ( 2 Satellites of Gas Giants 147177 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of Saturn's satellite, Titan? Choice Feedback A. It is the smallest of Saturn's satellites. Try again! B. Its surface temperature is comparable to the surface temperature of Earth. Saturn is nearly ten times as far from the sun as Earth. *C. Its atmosphere contains nitrogen. That's correct. D. It contains frozen water beneath the surface. Perhaps you're thinking of one of Jupiter's satellites. Global Incorrect Feedback The correct answer is: Its atmosphere contains nitrogen. -------------------------------------------------------------------------------- Question 8b of 10 ( 2 Satellites of Gas Giants 249315 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of the satellite, Titan? Choice Feedback A. It is the second largest of Saturn's satellites. Try again! B. Its core is similar to Earth's core. Scientists don't know much about Titan's core. *C. It is larger than the planet Mercury. That's correct. D. It is the only moon known to hold liquid water. No moon is known to hold liquid water. Global Incorrect Feedback The correct answer is: It is larger than the planet Mercury. -------------------------------------------------------------------------------- Question 8c of 10 ( 2 Satellites of Gas Giants 249316 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true of Saturn's satellite, Titan? Choice Feedback A. It is Saturn's only satellite. Try again! B. Its surface temperature is much warmer than the surface temperature of Earth. Saturn is nearly ten times as far from the sun as Earth. *C. It may be similar to Earth's early conditions. That's correct. D. It contains liquid water beneath the surface. Perhaps you're thinking of one of Jupiter's satellites. Global Incorrect Feedback The correct answer is: It may be similar to Earth's early conditions. -------------------------------------------------------------------------------- Question 9a of 10 ( 3 Pluto 147178 ) Maximum Attempts: 1 Question Type: Numeric Fill In Blank Maximum Score: 5 Correct Answer: 240 - 250 Question: Approximately how many years does it take Pluto to revolve around the sun? Attempt Incorrect Feedback 1st Try again! It takes Neptune about 165 years. Correct Feedback That's correct. Global Incorrect Feedback The correct answer is: 250. Pluto revolves around the sun once every 248 years. -------------------------------------------------------------------------------- Question 9b of 10 ( 3 Pluto 249318 ) Maximum Attempts: 1 Question Type: Numeric Fill In Blank Maximum Score: 5 Correct Answer: 1 Question: How many satellites does Pluto have? Attempt Incorrect Feedback 1st Try again! Correct Feedback That's correct. Global Incorrect Feedback The correct answer is: 1. Pluto has 1 satellite, named Charon. -------------------------------------------------------------------------------- Question 9c of 10 ( 3 Pluto 249319 ) Maximum Attempts: 1 Question Type: Numeric Fill In Blank Maximum Score: 5 Correct Answer: 6 - 10 Question: Approximately how many moons are there in the solar system that are larger than Pluto? Attempt Incorrect Feedback 1st Try again! Pluto is smaller than Mercury. Correct Feedback That's correct. Global Incorrect Feedback The correct answer is: 7. There are 7 moons in the solar system that are larger than Pluto. -------------------------------------------------------------------------------- Question 10a of 10 ( 2 General Properties of Gas Giants 263131 ) Maximum Attempts: 1 Question Type: Ordering Maximum Score: 5 Question: Arrange the objects from smallest to largest. Correct Answer: 1. The thickness of the rings around Saturn 2. The diameter of Earth's moon 3. The diameter of the orbit of Jupiter Attempt Incorrect Feedback 1st Try again! Saturn's rings may be wide, but they're not very thick. Correct Feedback That's the correct order. Global Incorrect Feedback The correct order is: The thickness of the rings around Saturn. The rings around Saturn are less than I km thick. The diameter of Earth's moon. Earth's moon is about 3500 km in diameter. The diameter of the orbit of Jupiter is far bigger than the diameter of Earth's moon. -------------------------------------------------------------------------------- Question 10b of 10 ( 2 General Properties of Gas Giants 249320 ) Maximum Attempts: 1 Question Type: Ordering Maximum Score: 5 Question: Arrange the objects from smallest to largest. Correct Answer: 1. The diameter of Pluto 2. The diameter of Titan 3. The diameter of Neptune Attempt Incorrect Feedback 1st Try again! Titan is a large moon. Correct Feedback That's the correct order. Global Incorrect Feedback The correct order is: Pluto is much smaller than any of these bodies. Titan is a large moon, but not as large as Neptune. Neptune is a gas giant, so it is much bigger than either of these. -------------------------------------------------------------------------------- Question 10c of 10 ( 2 General Properties of Gas Giants 249321 ) Maximum Attempts: 1 Question Type: Ordering Maximum Score: 5 Question: Arrange the objects from smallest to largest. Correct Answer: 1. The diameter of Charon 2. The diameter of Europa 3. The diameter of the rings around Saturn Attempt Incorrect Feedback 1st Try again! Saturn's rings have a wider diameter than Saturn itself. Correct Feedback That's the correct order. Global Incorrect Feedback The correct order is: Charon is Pluto's satellite. It is less than 1300 km in diameter. Europa is a large satellite of Jupiter, but is not larger than Saturn's rings. Saturn's rings have an even larger diameter than Saturn itself. --------------------------------------------------------------------------------