1 Which of the following types of object could reasonably be described as dirty snowballs or, for the larger ones,

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1 PHYS103 Hour Exam No. 1 Preview 1 Page: 1 1 Which of the following types of object could reasonably be described as dirty snowballs or, for the larger ones, flying icebergs? a. Asteroids. b. Kuiper Belt Objects. c. Stars. d. Terrestrial Planets. e. Meteors. 2 A planet that is following Kepler s Laws, accelerates a. in the direction of the planets motion. b. toward the Sun. c. between the direction of the planets motion and the direction from the planet to the Sun. d. opposite to the direction of the planets motion. e. away from the Sun. 3 The moons of Mars are a. large enough to be spherical. b. not large enough to be spherical. c. each about the size of Earth s Moon. 4 Mariner 9 was an early space probe sent to orbit a. Earth s Moon b. Mars c. Venus d. Mercury e. Jupiter 5 If the planets are numbered from 1 to 8, going outward from the Sun, the planet Mars is number a. 3. b. 4. c. 5. d. 1. e Which of the following situations does the Law of Inertia say will cause an object to have zero acceleration. a. Gravity is not affecting the object. b. The object is at rest for an instant. c. No external forces push or pull on the object. d. The object is moving. 7 Which of the following objects has a magnetic field whose North and South poles are displaced from its rotation axis poles and also from the center of the planet.? a. Mercury b. Uranus c. Jupiter d. Venus e. Saturn

2 PHYS103 Hour Exam No. 1 Preview 1 Page: 2 8 The density of water is 1000kg/m 3, the density of rock is about 3000kg/m 3, and the density of iron is 7800kg/m 3. Which of the following densities would indicate an object that might consist of rock surrounding an iron core? a. 500kg/m 3 b. 8000kg/m 3 c. 4000kg/m 3 d. 20,000kg/m 3 e. 1000kg/m 3 9 The current model for the way that planets acquire magnetic fields requires which of the following combinations of things? a. rotation and an iron core. b. only a core that contains a liquid electrical conductor. c. rotation and a core that contains liquid iron. d. rotation and a core that contains a liquid electrical conductor. e. only an iron core. 10 An astronomical unit is defined to be a. the average distance from our Sun to the closest planet, Mercury. b. the average distance from the Earth to the Moon. c. the average distance from the Earth to the Sun. d. the average distance from our Sun to the nearest star. 11 A large vortex or hurricane on Jupiter has been named a. The Great Dark Spot. b. The Great Red Spot. c. Jove s Eye. d. The Red Storm. 12 What total force will cause an object with a mass of 2kg to gain 5 meters per second every second? a. 10 Newtons. b. 2 Newtons. c. 5 Newtons. d. 9.8 Newtons. e. 490 Newtons. 13 The Cassini-Huygens spacecraft a. Went into orbit around the planet Jupiter. b. landed on the planet Mars. c. Went into orbit around the planet Saturn and dropped a probe into Titan s atmosphere. d. Flew past the planet Jupiter and photographed its moons. 14 Suppose that you drop two objects from the same height at the same time. Both objects are heavy enough to be unaffected by air resistance and one object is twice as heavy. Who predicted that the heavier object would hit the ground long before the lighter one? a. Pythagoras. b. Aristotle. c. Nobody predicted that. d. Galileo.

3 PHYS103 Hour Exam No. 1 Preview 1 Page: 3 15 Ancient lava flows on the Moon are called Lunar a. terrae. b. maria. c. craters. d. valleys. e. planitia. 16 Our Sun sends out intense streams of charged particle radiation. The radiation is prevented from hitting the Earth s atmosphere by a. the tilt of the Earth s rotation axis. b. the Earth s Moon. c. the Earth s gravitational field. d. the Earth s magnetic field. 17 Galileo had no diffi culty accounting for the motion of a thrown object because a. a force was needed to keep the object moving. b. no force was needed to keep the object moving. c. a force was needed to start the object moving. d. a force was needed to stop the object. e. no force was needed to start the object moving. 18 In Newton s Theory, a. the Earth and Moon move around a common point which, in turn, goes around the Sun. b. the Earth moves around the Moon which, in turn, goes around the Sun. c. the Moon moves around the Earth which, in turn goes around the Sun. d. the Earth and Sun move around a common point, which, in turn, goes around the Moon. 19 The distance from the Earth to the Moon a. varies enough that sometimes we get an annular lunar eclipse. b. varies enough that sometimes we get an annular solar eclipse. c. varies, but not enough to affect eclipses. d. is always the same. 20 Which of the following planets or moons has an atmosphere consisting mainly of Hydrogen and Helium with some methane? a. Titan b. Neptune c. Venus d. Saturn 21 Which of the following planets is 11 times the size of the Earth? a. Venus b. Neptune c. Uranus d. Jupiter e. Mars

4 PHYS103 Hour Exam No. 1 Preview 1 Page: 4 22 Hydrated minerals on the Moon a. are present in the same proportions as on Earth. b. are more abundant than on Earth. c. are almost completely absent. 23 Which of the following objects has a magnetic field with about ten times the intensity of the Earth s field? a. Earth s Moon b. Saturn c. Mars d. Mercury e. Jupiter 24 Apollo 11 made the first a. test of docking procedures in lunar orbit. b. manned orbit of the Moon. c. landing on the Moon by a spacecraft. d. manned landing on the Moon. 25 A motorcycle is accelerating from rest. Which of the following pairs of forces is an action-reaction pair? a. None of these pairs because acceleration requires an unbalanced force. b. The downward force of gravity on the motorcycle and the upward force of the road on the motorcycle. c. The force of the motorcycle on the road and the force exerted on the road by the ground underneath it. d. The force of the motorcycle engine on the motorcycle and the force of the road on the motorcycle. e. The force of the motorcycle on the road and the force of the road on the motorcycle. 26 In Kepler s Laws of planetary motion the Earth moves around a Sun that is fixed in space. In Newton s theory, a. the Sun and Earth do not really move at all. b. the Earth also moves around the unmoving Sun. c. the Sun moves around the unmoving Earth. d. the Sun and Earth move around a common center of mass. 27 The observed magnetic field of Mercury is surprising because it was expected to have a. a much larger magnetic field because of its huge iron core. b. a magnetic field similar to Earth s because it is a terrestrial planet. c. no magnetic field at all because its density indicates only a small iron core. d. no magnetic field at all because it rotates so slowly. 28 How many of the moons of Saturn are larger than the Earth s Moon? a. 0 b. 1 c. 2 d. 4 e. 3

5 PHYS103 Hour Exam No. 1 Preview 1 Page: 5 29 Mars orbit is currently a. elliptical enough to make the intensity of sunlight vary by 40 percent. b. slightly elliptical but not enough to affect the intensity of sunlight. c. exactly circular. d. elliptical enough to make the intensity of sunlight vary by 6 percent. 30 A rocket that leaves the Earth s atmosphere at a speed of 4 miles per second will a. escape from the Earth s gravity forever. b. follow an elliptical path that is partly below the surface of the Earth. c. go into a circular orbit above the surface of the Earth. 31 Between the orbits of Mars and Jupiter you find a. The Planet Saturn. b. the Asteroid Belt. c. the Kuiper Belt. d. The Planet Neptune. e. The Oort Cloud. 32 Which of the following temperatures is closest to what you might expect on the planet Saturn? a F b F c F d. 100 F e. 50 F 33 Space probes often use gravitational slingshot maneuvers. The main purpose of these maneuvers is to a. arrive at the destination at the right time. b. launch probes from Earth orbit without using rockets. c. change the direction and speed of the probe without using rockets. d. see more planets in a single trip. 34 The dark side of the Moon, where the Sun never shiines, a. does not exist. b. is the side that always faces toward the Earth. c. is the side that always faces away from Earth. 35 Which of the following was the spacecraft that operated in Mars orbit for nine years, finding traces of water and an early magnetic field? a. Mars Global Surveyor b. Viking orbiter 1 c. Surveyor 1 d. Mariner 9 e. Viking orbiter 2

6 PHYS103 Hour Exam No. 1 Preview 1 Page: 6 36 A full cycle of day and night on Mars is called a sol. In terms of 24 hour Earth days, a Martian sol is a. about 27 Earth days. b. slightly longer than one Earth day. c. about 687 Earth days. d. about 11 hours. e. slightly shorter than one Earth day. 37 Which of the following three systems is regarded as the most normal for a terrestrial planet? a. Venus, with no moons at all. b. Earth, with a moon larger than the dwarf planet Pluto. c. Mars, with two moons each the size of an asteroid. 38 The moon Miranda is peculiar because it a. is black on one side and white on the other. b. orbits the wrong way. c. has a surface feature that looks like a giant check mark. d. square dances with another moon. e. has a dense atmosphere. 39 As of 2009, how many space probes have flown past Neptune? a. 2. b. 4. c. 3. d. 0. e The first space probe to land on Venus was a. Venera 9. b. Venera 7. c. Voyager 1. d. Viking 1. e. Mariner Uranus rotates on its axis once in about a. 10 hours. b. 88 Earth days. c. 10 Earth days. d. 24 hours. e. 17 hours. 42 Satellites such as the International Space Station orbit above most of the Earth s atmosphere because a. gravity does not extend beyond the atmosphere, so there is no gravity to pull the satellite down. b. it avoids creating sonic booms that would annoy people. c. there is no air friction to slow the satellite down. d. then the top of the atmosphere can support the satellite.

7 PHYS103 Hour Exam No. 1 Preview 1 Page: 7 43 Newton s explanation of Kepler s Laws relied upon a force that a. acts on all objects. b. acts only on heavenly bodies. c. acts on planets but not on comets. d. acts only on planets. e. acts only on inorganic matter. 44 Earth s orbit is currently elliptical enough to make the intensity of sunlight vary by 6 percent. The shortest Earth-Sun distance (and highest intensity sunlight) currently occurs a. every Winter Solstice. b. at different times each year. c. every January. d. every July. e. every Summer Solstice. 45 Saturn rotates on its axis once in about a. 88 Earth days. b. 10 hours. c. 17 hours. d. 10 Earth days. e. 24 hours. 46 On the present surface of Mars, water has been confirmed to exist a. as ice at the poles and water vapor in the atmosphere. b. as small streams of liquid water. c. as oceans. d. nowhere at all. The planet is completely dry. 47 According to the Law of Inertia, a moving object that feels no outside force will a. keep moving. b. stop immediately. c. stop when it runs out of inertia. 48 Which of the following planets does the moon Ganymede orbit? a. Mars b. Neptune c. Jupiter d. Saturn e. Uranus 49 The atmospheric pressure on the surface of Mars is a. about the same as the surface pressure of Earth s atmosphere. b. 90 times the surface pressure of Earth s atmosphere. c. essentially zero. d. about 1% the surface pressure of Earth s atmosphere.

8 PHYS103 Hour Exam No. 1 Preview 1 Page: 8 50 As viewed from the star Polaris, Venus a. rotates counter-clockwise and goes around the Sun clockwise. b. does not rotate at all. c. rotates clockwise and goes around the Sun counter-clockwise. d. rotates counter-clockwise and goes around the Sun counter-clockwise. e. rotates clockwise and goes around the Sun clockwise.

9 PHYS103 Hour Exam No. 1 Preview 1 Page: 9 Answer Key: Practice Exam 2, Version 1 1 Choice b. (Kuiper Belt Objects.) 2 Choice b. (toward the Sun.) 3 Choice b. (not large enough to be spherical.) 4 Choice b. (Mars) 5 Choice b. (4.) 6 Choice c. (No external forces push or pull on the object.) 7 Choice b. (Uranus) 8 Choice c. (4000kg/m 3 ) 9 Choice d. (rotation and a core that contains a liquid electrical conductor.) 10 Choice c. (the average distance from the Earth to the Sun.) 11 Choice b. (The Great Red Spot.) 12 Choice a. (10 Newtons.) 13 Choice c. (Went into orbit around the planet Saturn and dropped a probe into Titan s atmosphere.) 14 Choice b. (Aristotle.) 15 Choice b. (maria.) 16 Choice d. (the Earth s magnetic field.) 17 Choice b. (no force was needed to keep the object moving.) 18 Choice a. (the Earth and Moon move around a common point which, in turn, goes around the Sun.) 19 Choice b. (varies enough that sometimes we get an annular solar eclipse.) 20 Choice b. (Neptune) 21 Choice d. (Jupiter) 22 Choice c. (are almost completely absent.) 23 Choice e. (Jupiter) 24 Choice d. (manned landing on the Moon.) 25 Choice e. (The force of the motorcycle on the road and the force of the road on the motorcycle.) 26 Choice d. (the Sun and Earth move around a common center of mass.) 27 Choice d. (no magnetic field at all because it rotates so slowly.) 28 Choice b. (1) 29 Choice a. (elliptical enough to make the intensity of sunlight vary by 40 percent.) 30 Choice b. (follow an elliptical path that is partly below the surface of the Earth.) 31 Choice b. (the Asteroid Belt.) 32 Choice a. (-250 F) 33 Choice c. (change the direction and speed of the probe without using rockets.) 34 Choice a. (does not exist.) 35 Choice a. (Mars Global Surveyor) 36 Choice b. (slightly longer than one Earth day.)

10 PHYS103 Hour Exam No. 1 Preview 1 Page: Choice a. (Venus, with no moons at all.) 38 Choice c. (has a surface feature that looks like a giant check mark.) 39 Choice e. (1.) 40 Choice b. (Venera 7.) 41 Choice e. (17 hours.) 42 Choice c. (there is no air friction to slow the satellite down.) 43 Choice a. (acts on all objects.) 44 Choice c. (every January.) 45 Choice b. (10 hours.) 46 Choice a. (as ice at the poles and water vapor in the atmosphere.) 47 Choice a. (keep moving.) 48 Choice c. (Jupiter) 49 Choice d. (about 1% the surface pressure of Earth s atmosphere.) 50 Choice c. (rotates clockwise and goes around the Sun counter-clockwise.)

11 PHYS103 Hour Exam No. 1 Preview 1 Page: 11 Where to find these questions in the lecture notes 1 Module g01 Solar System Overview Comets 2 Module g01 Science Models of Gravity Explaining Kepler s Laws 3 Module g01 The Terrestrial Planets Mars Moons 4 Module The Terrestrial Planets Mars Space Probes 5 Module g01 Solar System Overview The Big Picture 6 Module g01 Science Models of Motion Acceleration 7 Module The Jovian Planets Uranus Magnetic Field 8 Module g01 Solar System Overview The Terrestrial Planets 9 Module The Terrestrial Planets Mercury Magnetic Field 10 Module Solar System Overview The Big Picture 11 Module The Jovian Planets Jupiter Surface 12 Module Science Models of Motion Force and Mass F=ma 13 Module The Jovian Planets Saturn Space Probes 14 Module g01 Science Models of Motion The Universality of Free Fall 15 Module The Terrestrial Planets Moon Surface Features 16 Module The Terrestrial Planets Earth Magnetic Field 17 Module g01 Science Models of Motion The Law of Inertia 18 *Module Science Models of Gravity Making New Predictions (39%) 19 Module The Terrestrial Planets Moon Orbit and Rotation (48%) 20 Module The Jovian Planets Neptune Surface 21 Module The Jovian Planets Jupiter Surface 22 Module The Terrestrial Planets Moon Oddities of the Moon Formation of the Moon 23 Module The Jovian Planets Jupiter Magnetic Field 24 Module g01 The Terrestrial Planets Moon Space Probes 25 Module g01 Science Models of Motion Action and Reaction 26 Module g01 Science Models of Gravity Making New Predictions 27 *Module g01 The Terrestrial Planets Mercury Magnetic Field (38%) 28 ***Module g01 The Jovian Planets Saturn Moons(17%) 29 Module The Terrestrial Planets Mars Orbit and Rotation 30 Module g01 Science Models of Gravity Artificial Satellites 31 Module g01 Solar System Overview Asteroids 32 Module The Jovian Planets Saturn Surface 33 Module The Terrestrial Planets Mercury Space Probes 34 ***Module g01 The Terrestrial Planets Moon Orbit and Rotation (26%) 35 *Module The Terrestrial Planets Mars Space Probes (35%) 36 Module g01 The Terrestrial Planets Mars Orbit and Rotation

12 PHYS103 Hour Exam No. 1 Preview 1 Page: Module Solar System Overview The Terrestrial Planets (42%) 38 Module The Jovian Planets Uranus Moons 39 Module g01 The Jovian Planets Neptune Space Probes 40 **Module g01 The Terrestrial Planets Venus Space Probes (34%) 41 Module The Jovian Planets Uranus Orbit and Rotation 42 Module g01 Science Models of Gravity Artificial Satellites 43 Module Science Models of Gravity Unifying Physical Law 44 **Module g01 The Terrestrial Planets Earth Orbit and Rotation (34%) 45 Module The Jovian Planets Saturn Orbit and Rotation (42%) 46 Module The Terrestrial Planets Mars Surface 47 EModule g01 Science Models of Motion Force and Mass (F20113:97%) 48 Module The Jovian Planets Jupiter Moons 49 Module g01 The Terrestrial Planets Mars Surface (42%) 50 Module g01 The Terrestrial Planets Venus Orbit and Rotation