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ASTR PExam2 V1

Astronomy Practice Exam 1 for Test#2

Question	Answer
Which of the following types of object could reasonably be described as "dirty snowballs" or, for the larger ones, "flying icebergs"?	Kuiper Belt Objects
A planet that is following Kepler's Law, accelerates?	Toward the Sun
The moons of Mars are?	Not large enough to be spherical
Mariner 9 was an early space probe sent to orbit?	Mars
If the planets are numbered from 1 to 8, going outward from the Sun, the planet Mars is number?	4
Which of the following situations does the Law of Inertia say will cause an object to have zero acceleration?	No external forces push or pull on the object
Which of the following objects has a magnetic field whose North and South poles are displaced from its rotation axis poles and also the the center of the planet?	Uranus
The density of water is 1000kg/m3, the density of rock is about 3000kg/m3, and the density of iron is 7800kg/m3. Which of the following densities would indicate an object that might consist of rock surrounding an iron?	4000kg/m3
The current model for the way the planets acquire magnetic fields requires which of the following combinations of things?	Rotation and a core that contains a liquid electrical conductor
An astronomical unit is defined to be?	The average distance from the Earth to the Sun
A large vortex or hurricane on Jupiter has been named?	The Great Red Spot
What total force will cause an object with a mass of 2kg to gain 5 meters per second every second?	10 Newtons
The Cassini-Huygens spacecraft?	Went into orbit around the planet Saturn and dropped a probe into Titan's atmosphere
Suppose that you drop two objects from the same height at the same time.Both objects are heavy enough to be affected 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?	Aristotle
Ancient lava flows on the Moon are called Lunar?	Maria
Our Sun sends out intense streams of charged particle radiation. The radiation is prevented from hitting the Earth's atmosphere by?	The Earth's magnetic field
Galileo had no difficulty accounting for the motion of a thrown object because?	No force was needed to keep the object moving
In Newton's Theory?	The Earth and Moon move around a common point which, in turn, goes around the Sun
The distance from the Earth to the Moon?	Varies enough that sometimes we get an annular solar eclipse
Which of the following planets or moons has an atmosphere consisting mainly of Hydrogen and Helium with some methane?	Neptune
Which of the following planets is 11 times the size of the Earth?	Jupiter
Hydrated minerals on the Moon?	Are almost completely absentJu
Which of the following objects has a magnetic field with about ten times the intensity of the Earth's field?	Jupiter
Apollo made the first?	Manned landing on the moon
A motorcycle is accelerating from rest. Which of the following pairs of forces is an action-reaction pair?	The force of the motorcycle on the road and the force of the road on the motorcycle
In Kepler's Laws of planetary motion the Earth moves around a Sun that is fixed in space. In Newton's theory?	The Sun and Earth move around a common center of mass
The observed magnetic field of Mercury is surprising because it was expected to have?	No magnetic field at all because it rotates so slowly
How many of the moons of Saturn are larger than the Earth's Moon?	1
Mar's orbit is currently?	Elliptical enough to make the intensity of sunlight vary by 40 percent
A rocket that leaves the Earth's atmosphere at a speed of 4 miles per second will?	Follow an elliptical path that is partly below the surface of the Earth
Between the orbits of Mars and Jupiter you find?	The Asteroid Belt
Which of the following temperatures is closest to what you might expect on the planet Saturn?	-250F
Space probes often use gravitational slingshot maneuvers. The main purpose of these maneuvers is to?	Change the direction and speed of the probe without using rockets
The dark side of the Moon, where the Sun never shines?	Does not exist
Which of the following was the spacecraft that operated in Mars orbit for nine years, finding traces of water and an early magnetic field?	Mars Global Surveyor
A full cycle of day and night on Mars is called a "sol". In terms of 24 hour Earth days, a Martian sol is?	Slightly longer than one Earth day
Which of the following three systems is regarded as the most normal for a terrestrial planet?	Venus, with no moons at all
The moon Miranda is peculiar because it?	Has a surface feature that looks like a giant check mark
As of 2009, how many space probes have flown past Neptune?	1
The first space probe to land on Venus was?	Venera 7
Uranus rotates on its axis once in about?	17 hours
Satellites such as the International Space Station orbit above most of the Earth's atmosphere because?	There is no air friction to slow the satellite down
Newton's explanation of Kepler's Laws relied upon a force that?	Acts on all objects
Earth's orbit is currently elliptical enough to make the intensity of sunlight vary by 6%. The Earth-Sun distance (and highest intensity sunlight) currently occurs.	Every January
Saturn rotates on its axis once in about?	10 hours
On the present surface of Mars, water has been confirmed to exist?	As ice at the poles and water vapor in the atmosphere
According to the Law of Inertia, a moving object that feels no outside force will?	Keep moving
Which of the following planets does the moon Ganymede orbit?	Jupiter
The atmospheric pressure on the surface of Mars is?	About 1% the surface pressure of Earth's atmosphere
As viewed from the star Polaris, Venus?	Rotates clockwise and goes around the Sun counter-clockwise

Created by: jerry.stillman

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