midterm1S08

midterm1S08 - ASTRONOMY 100 Dr. Nick Warner 5:00 pm,...

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1 ASTRONOMY 100 Dr. Nick Warner MIDTERM 1 ____________ 5:00 pm, February 12 th , 2008 SOLUTIONS AT END Exam Number Time Allowed: 1 hour ________________________ Name (Please Print) 1. The Suns’s angular size in the sky is approximately a) 30 arcseconds b) 30 arcminutes c) 30 degrees d) 1/30 arcminute e) 1/30 arcsecond 2. The phenomenon where two waves combine together so that they partially cancel each other out and the combined wave motion is less that the individual wave motions is known as a) diffraction b) constructive interference c) destructive interference d) energy damping e) diffractive damping 3. The eccentricity of a planet's orbit describes a) its shape compared to that of a circle. b) its tilt with respect to the plane of Earth's orbit (the ecliptic plane) c) its motion at any specific point in its orbit as seen from Earth, i.e., whether direct, retrograde or stationary. d) the tilt of the planet's spin axis with respect to its orbital plane. e) the ratio of the sizes of the epicycle and the deferent. 4. The status of the idea commonly known as Intelligent Design is best described as a) A scientific theory that presents a serious challenge to the more widely accepted theory of Evolution. b) A scientific theory that, despite some flaws at present, is being refined and improved. c) Not a scientific theory because it has not been widely accepted by scientists. d) Not a scientific theory because it makes no testable predictions. 5. In modern astronomy, the constellations are a) clusters of stars that are held together by the mutual gravitational attractions of the individual stars in the cluster. b) collections of stars that, while not necessarily gravitationally bound, were formed at roughly the same time and place c) nearby galaxies to which astronomers have given specific names. d) 12 regions of sky through which the Sun, Moon, and planets appear to move as seen from Earth. e) 88 regions of sky each of which is merely located along more or less the same line of sight as viewed from Earth 6. A certain object in space is accelerating. From this, we know for certain that a) both its speed and its direction of travel are changing b) its speed or its direction of travel is changing, but not both c) its speed is changing d) its speed or its direction or travel is changing, or possibly both
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2 7. Who first demonstrated that Earth must be a sphere a) Aristotle b) Aristarchus c) Ptolemy d) Columbus e) Magellan 8. A parsec is a) the distance that light travels (in a vacuum) in one second b) the speed at which one travels 1 AU in one second c) the distance at which 1 AU spans one arcsecond d) the speed at which one travels 1 light-year in one second e) the distance at which one light-year spans one arcsecond 9. Suppose you see the Celestial Equator running around your horizon. Which of the following most accurately characterizes what you can deduce about your location: a) you are at the north pole b) you are at the south pole c) you could be at either the north or south pole
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midterm1S08 - ASTRONOMY 100 Dr. Nick Warner 5:00 pm,...

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