stion 1a of 10 ( 2 Earth's Magnetism 165620 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Magnetic striping is evidence of _____. Choice Feedback *A. seafloor spreading That's correct! B. Earth's gravity Not this one. Earth's gravity does not cause magnetic striping. C. aurora borealis That's not it. The aurora is caused by radiation collecting at the Poles. D. the Van Allen belts Not this one. The Van Allen belts are regions in outer space caused by Earth's magnetism. Global Incorrect Feedback The correct answer is: seafloor spreading. Magnetic striping is evidence of seafloor spreading. -------------------------------------------------------------------------------- Question 1b of 10 ( 2 Earth's Magnetism 259968 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Magnetic stripes on the seafloor are caused in part by: Choice Feedback *A. movement of ocean crust. That's correct! B. gravity. Not this one. Earth's gravity does not cause magnetic striping. C. tidal forces. That's not it. Tidal forces are unrelated to magnetic striping. D. declination of the poles. Not this one. Declination is a measurement of the difference between magnetic and geographic poles. Global Incorrect Feedback The correct answer is: movement of ocean crust. Magnetic stripes on the seafloor are caused by movement of ocean crust. -------------------------------------------------------------------------------- Question 1c of 10 ( 2 Earth's Magnetism 259969 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Magnetic striping is evidence of _____. Choice Feedback *A. pole reversals That's correct! B. Jupiter's magnetosphere Not this one. Jupiter's magnetosphere does not affect the magnetic striping. C. Earth's rotation That's not it. Earth's rotation is not shown by magnetic striping. D. the Van Allen belts Not this one. The Van Allen belts are regions in outer space caused by Earth's magnetism. Global Incorrect Feedback The correct answer is: pole reversals. Magnetic striping is evidence of pole reversals. -------------------------------------------------------------------------------- Question 2a of 10 ( 2 Earth's Magnetism 165621 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: core, outer core Question: The convection that causes Earth's magnetic field happens in Earth's _____. Attempt Incorrect Feedback 1st The region contains liquid matter. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: core. The convection that causes Earth's magnetic field happens in Earth's core. The material in the outer core is liquid and sloshes around due to convection. This movement creates Earth's magnetic field. -------------------------------------------------------------------------------- Question 2b of 10 ( 2 Earth's Magnetism 259988 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: core, outer core Question: The layer inside Earth that creates Earth's magnetosphere is the _____. Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: core. The convection that causes Earth's magnetic field happens in Earth's core. The material in the outer core is liquid and sloshes around due to convection. This movement creates Earth's magnetic field, which is understood as a magnetosphere. -------------------------------------------------------------------------------- Question 2c of 10 ( 2 Earth's Magnetism 259989 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: core, outer core Question: The dynamo theory states that Earth's magnetic field is created in the layer known as the ______. Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: core. The convection that causes Earth's magnetic field happens in Earth's core. The material in the outer core is liquid and sloshes around due to convection. This movement creates Earth's magnetic field. -------------------------------------------------------------------------------- Question 3a of 10 ( 2 Magnets and Compasses 338145 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match the object with its characteristic. Choice Text Correct Match Match Text A. Earth B. Permanent magnet B. Refrigerator magnet A. Electromagnet C. Venus C. Not magnetic Attempt Incorrect Feedback 1st That's not it. Electromagnets sometimes switch off, but permanent magnets are always magnetic. Correct Feedback That's correct! Global Incorrect Feedback The correct answers are: Earth is an electromagnet, A refrigerator magnet is an example of a permanent magnet, and Venus is not magnetic. -------------------------------------------------------------------------------- Question 3b of 10 ( 2 Magnets and Compasses 338146 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match the object with its characteristic. Choice Text Correct Match Match Text A. MRI B. Permanent magnet B. Compass A. Electromagnet C. Moon C. Not magnetic Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answers are: An MRI uses an electromagnet, A compass is an example of a permanent magnet, and The moon is not magnetic. -------------------------------------------------------------------------------- Question 3c of 10 ( 2 Magnets and Compasses 338147 ) Maximum Attempts: 1 Question Type: Matching II Maximum Score: 5 Question: Match the object with its characteristic. Choice Text Correct Match Match Text A. Jupiter B. Permanent magnet B. Refrigerator magnet A. Electromagnet C. Mars C. Not magnetic Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answers are: Jupiter is an electromagnet, A refrigerator magnet is an example of a permanent magnet, and Mars is not magnetic. -------------------------------------------------------------------------------- Question 4a of 10 ( 2 Poles 165624 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which best describes Earth's north magnetic pole? Choice Feedback A. Charged That's not it. A magnetic pole is not described as being charged or uncharged. B. Permanent That's not it. Earth's magnetic field is not permanent. *C. Wandering That's correct! D. Aligned with the geographic North Pole That's incorrect. The geographic and magnetic poles are not aligned. Global Incorrect Feedback The correct answer is: Wandering. -------------------------------------------------------------------------------- Question 4b of 10 ( 2 Poles 259974 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which best describes Earth's south magnetic pole? Choice Feedback A. Aligned with the geographic South Pole That's not it. The geographic and magnetic poles are not aligned. B. Stationary That's not it. Earth's magnetic field is not stationary. *C. Moving That's correct! D. Aligned with the geographic North Pole That's incorrect. The geographic and magnetic poles are not aligned. Global Incorrect Feedback The correct answer is: Moving. -------------------------------------------------------------------------------- Question 4c of 10 ( 2 Poles 259975 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which best describes Earth's north magnetic pole? Choice Feedback A. Defined by Earth's rotation That's not it. This is how geographic poles are defined. B. Circling around the geographic North Pole That's not it. Earth's magnetic field does not circle around regularly. *C. Wandering slowly with no pattern That's correct! D. Aligned with the geographic South Pole That's incorrect. The geographic and magnetic poles are not aligned. Global Incorrect Feedback The correct answer is: Wandering slowly with no pattern. -------------------------------------------------------------------------------- Question 5a of 10 ( 3 Earth's Magnetism 165625 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is evidence that supports the dynamo theory? Choice Feedback A. Iron does not conduct electricity. That's not it. Iron is inside the core, so if it did not conduct electricity, this would be evidence against the dynamo theory. B. Convection occurs in the mantle very slowly. That's not it. Convection in the mantle is not thought to affect Earth's magnetic field. Convection in the outer core is thought to be the reason. *C. Earth's core contains mostly iron and nickel. That's correct! D. Silicon is a conductive material. Silicon is a semi-conductor, not a conductor, and iron is believed to be the main conductive element that causes Earth's magnetic field. Global Incorrect Feedback The correct answer is: Earth's core contains mostly iron and nickel. -------------------------------------------------------------------------------- Question 5b of 10 ( 3 Earth's Magnetism 259976 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is evidence that supports the dynamo theory? Choice Feedback A. Granite and basalt conduct electricity. That's not it. These are rocks that make up the crust, which does not create the magnetic field. B. Convection occurs in Earth's inner core. That's not it. Earth's inner core is solid. *C. Earth's outer core contains liquids that conduct electricity. That's correct! D. Earth's crust contains a large amount of iron. Earth's crust does not contain much iron. Global Incorrect Feedback The correct answer is: Earth's outer core contains liquids that conduct electricity. -------------------------------------------------------------------------------- Question 5c of 10 ( 3 Earth's Magnetism 259977 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is evidence that supports the dynamo theory? Choice Feedback A. Iron does not conduct magnetism. That's not it. Magnetism is not a thing that is "conducted." B. The mantle is a solid. That's not it. The mantle is not thought to create the magnetic field. *C. Earth's outer core is a liquid. That's correct! D. Convection only occurs in the mantle. This is not true. Global Incorrect Feedback The correct answer is: Earth's outer core is a liquid. -------------------------------------------------------------------------------- Question 6a of 10 ( 2 Earth's Magnetism 165626 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What creates the Van Allen belts? Choice Feedback *A. Deflection of charged particles That's correct! B. Earth's gravity Earth's magnetic field causes the deflection that creates the Van Allen belts. C. Aurora borealis The aurora borealis is caused by the same deflection that creates the Van Allen belts. D. Convection in the mantle Earth's magnetic field is due to convection in the core, not the mantle. Global Incorrect Feedback The correct answer is: Deflection of charged particles. -------------------------------------------------------------------------------- Question 6b of 10 ( 2 Earth's Magnetism 259978 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is a result of the deflection of charged particles along the Van Allen belts? Choice Feedback *A. Aurora borealis That's correct! B. Declination Declination is not caused by the Van Allen belts. C. Pole reversals Pole reversals are not caused by the Van Allen belts. D. Convection in the mantle The Van Allen belts do not cause convection. Global Incorrect Feedback The correct answer is: Aurora borealis. -------------------------------------------------------------------------------- Question 6c of 10 ( 2 Earth's Magnetism 259979 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What creates the Van Allen belts? Choice Feedback *A. Earth's magnetosphere That's correct! B. Earth's gravity Gravity does not create the Van Allen belts. C. Earth's aurora borealis The aurora borealis is caused by the same deflection that creates the Van Allen belts. D. Earth's mantle convection The convection in the mantle does not create the Van Allen belts. Global Incorrect Feedback The correct answer is: Earth's magnetosphere. -------------------------------------------------------------------------------- Question 7a of 10 ( 2 Magnets and Compasses 165627 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of compasses? Choice Feedback A. Compasses always point toward geographic north. Compasses always point toward magnetic north, not geographic north. *B. A compass has both a south pole and a north pole. That's correct! C. A compass has only a south pole. All magnets have both a north and south pole. D. Compasses are generally electromagnets. Compasses are generally made from permanent magnets. Global Incorrect Feedback The correct answer is: A compass has both a south pole and a north pole. -------------------------------------------------------------------------------- Question 7b of 10 ( 2 Magnets and Compasses 259980 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of compasses? Choice Feedback A. Compasses always point toward geographic south. Compasses always point toward magnetic north, not geographic south. *B. A compass is a permanent magnet. That's correct! C. A compass has only a north pole. All magnets have both a north and south pole. D. Compasses are not always magnetized. Compasses are generally made from permanent magnets, which are always magnetized. Global Incorrect Feedback The correct answer is: A compass is a permanent magnet. -------------------------------------------------------------------------------- Question 7c of 10 ( 2 Magnets and Compasses 259981 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of compasses? Choice Feedback A. Compasses always point toward geographic north. Compasses always point toward magnetic north, not geographic north. *B. Compass magnets can be deflected by Earth's magnetic field or other permanent magnets. That's correct! C. Compass magnets can only be deflected by electromagnets such as Earth's magnetic field. All magnets have both a north and south pole. D. Compasses detect fluctuations in convection in the mantle. Convection in the mantle does not affect Earth's magnetic field. Global Incorrect Feedback The correct answer is: Compass magnets can be deflected by Earth's magnetic field or other permanent magnets. -------------------------------------------------------------------------------- Question 8a of 10 ( 2 Earth's Magnetism 165628 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Earth's magnetic field affects: Choice Feedback A. only other planets. Any magnetic field will affect all magnets and charged particles. *B. all magnets and moving charged particles. That's correct! C. only permanent magnets. Any magnetic field will affect all magnets and charged particles. D. only electromagnets and charged particles. Any magnetic field will affect all magnets and charged particles. Global Incorrect Feedback The correct answer is: all magnets and moving charged particles. Earth's magnetic field affects all magnets and moving charged particles. -------------------------------------------------------------------------------- Question 8b of 10 ( 2 Earth's Magnetism 259982 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Earth's magnetic field does not affect ____. Choice Feedback A. moving charged particles It does affect these. *B. other planets That's correct! C. permanent magnets It does affect these. D. electromagnets It does affect these. Global Incorrect Feedback The correct answer is: other planets. Earth's magnetic field does not affect other planets. -------------------------------------------------------------------------------- Question 8c of 10 ( 2 Earth's Magnetism 259983 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: A permanent magnet can affect: Choice Feedback A. both non-magnets and electromagnets. Any magnetic field will affect all magnets and charged particles. *B. both permanent magnets and electromagnets. That's correct! C. only permanent magnets. Any magnetic field will affect all magnets and charged particles. D. only electromagnets and charged particles. Any magnetic field will affect all magnets and charged particles. Global Incorrect Feedback The correct answer is: both permanent magnets and electromagnets. A permanent magnet can affect both permanent magnets and electromagnets. -------------------------------------------------------------------------------- Question 9a of 10 ( 2 Poles 165629 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which body in our solar system has magnetic pole reversals? Choice Feedback A. Venus Venus does not have a magnetic field, so it does not have reversals. B. Earth's moon The moon does not have a magnetic field, so it does not have reversals. C. Mars Mars does not have a magnetic field, so it does not have reversals. *D. The sun That's correct! Global Incorrect Feedback The correct answer is: The sun. -------------------------------------------------------------------------------- Question 9b of 10 ( 2 Poles 259984 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Other than Earth, ______ is also known to have magnetic pole reversals. Choice Feedback A. Venus Venus does not have a magnetic field, so it does not have reversals. B. Earth's moon The moon does not have a magnetic field, so it does not have reversals. C. Mars Mars does not have a magnetic field, so it does not have reversals. *D. the sun That's correct! Global Incorrect Feedback The correct answer is: the sun. -------------------------------------------------------------------------------- Question 9c of 10 ( 2 Poles 259985 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: The sun's pole reversals are tied to its ______. Choice Feedback A. seafloor spreading The sun does not have a seafloor. B. gravity fluctuations This is not related to pole reversals. C. system of orbits The sun does not orbit anything in our solar system. *D. cycle of sunspots That's correct! Global Incorrect Feedback The correct answer is: cycle of sunspots. -------------------------------------------------------------------------------- Question 10a of 10 ( 2 Magnets and Compasses 165630 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which describes how a compass works? Choice Feedback A. The magnetic north pole of the compass points to Earth's geographic North Pole. Magnets point toward the magnetic pole, not the geographic Pole. B. The magnetic north pole of the compass points to Earth's north magnetic pole. A north magnetic pole will always be attracted to the south magnetic pole. C. The south magnetic pole of the compass points to Earth's geographic North Pole. Magnets point toward the magnetic pole, not the geographic Pole. *D. The south magnetic pole of the compass points to Earth's north magnetic pole. That's correct! Global Incorrect Feedback The correct answer is: The south magnetic pole of the compass points to Earth's north magnetic pole. -------------------------------------------------------------------------------- Question 10b of 10 ( 2 Magnets and Compasses 259986 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: The north pole of a compass magnet points toward _____. Choice Feedback A. geographic south It points toward a magnetic pole, not a geographic pole. *B. magnetic south That's correct! C. magnetic north That's not how magnets work. D. geographic north It points toward a magnetic pole, not a geographic pole. Global Incorrect Feedback The correct answer is: magnetic south. -------------------------------------------------------------------------------- Question 10c of 10 ( 2 Magnets and Compasses 259987 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: The south pole of a compass magnet points toward _____. Choice Feedback A. geographic south It points toward a magnetic pole, not a geographic pole. *B. magnetic north That's correct! C. magnetic south That's not how magnets work. D. geographic north It points toward a magnetic pole, not a geographic pole. Global Incorrect Feedback The correct answer is: magnetic north. --------------------------------------------------------------------------------