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Astronomy 103

Exam #1: Ch 1-4

QuestionAnswer
You are standing on the equator and you notice that the sun is directly overhead. What Equinox is it? Vernal or Autumn Equinox
You are standing on the equator and you notice that the sun is directly overhead. The sun is on the __________. Zenith
You are standing on the equator and you notice that the sun is directly overhead. The sun will be above the horizon for _______ hours that day. 12 hours
You are standing on the equator and you notice that the sun is directly overhead. (True or False). All the stars in the sky will be circumpolar. False.
You are standing on the equator and you notice that the sun is directly overhead. What is the declination of the sun? 0 degrees
You are standing on the equator and you notice that the sun is directly overhead. What is the altitude of the sun? 90 degrees
You are standing on the equator and you notice that the sun is directly overhead. (True or False) The sun is on the celestial meridian True
You are standing on the equator and you notice that the sun is directly overhead. What is the altitude of the north celestial pole from this location? 0 degrees
You are standing on the equator and you notice that the sun is directly overhead. (True or False) 3 months later the sun is now at a declination of -23.5 degrees, this is due to the precession of the earth's axis of rotation. False.
You're still on the equator. Since the sun is directly overhead you know its noon. At exactly noon a full solar eclipse occurs. What phase is the moon in? New Moon
You're still on the equator. Since the sun is directly overhead you know its noon. At exactly noon a full solar eclipse occurs. Approximately what time would you expect the moon to set? 6pm
You are now an ancient Greek astronomer. How would you answer the following question. What is not evidence for an earth centered universe? Retrograde orbits of planets
You are now an ancient Greek astronomer. How would you answer the following question. (True or False) The 3 things we (as ancient greeks) know is that the universe is unchanging, everything orbits in perfect circles, and the earth is the center. True
You are now an ancient Greek astronomer. How would you answer the following question. (True or False) I can easily use the altitude of the north celestial pole to find my longitude on earth False
You are now an ancient Greek astronomer. How would you answer the following question. (True or False) In order to find my longitude on earth I need to define a universal time. True
Answer the following as a modern astronomer would. The Copernicus model simplified the explanation of____________. Retrograde orbits of planets
Answer the following as a modern astronomer would. (True or False). Tycho showed that supernova explosions happened much further away than the planets. True
Answer the following as a modern astronomer would. (True or False) Tycho took some of the most accurate naked eye observations of celestial objects to date. True
Answer the following as a modern astronomer would. What paradigm did Kepler do away with to prove the sun centered model? The notion of perfect circles
Answer the following as a modern astronomer would. Kepler's second law tells that_______. Orbiting objects sweep out equal areas in equal times during their orbits
Answer the following as a modern astronomer would. (True or False) The larger an object's average orbital radius, the smaller the period of the orbit. False
Answer the following as a modern astronomer would. (True or False) Galileo measured stellar parallax. True
Answer the following as a modern astronomer would.What is not a hallmark of science? It must conform to paradigm
Answer the following as a modern astronomer would. Speed and velocity are identical quantities. False
Answer the following as a modern astronomer would. Acceleration requires a ____________. Force
Answer the following as a modern astronomer would. Newtons's second law of motion states _________. F = ma
Answer the following as a modern astronomer would.The sun exerts a force on the earth and the earth exerts a force on the sun ___________. equal and opposite
Answer the following as a modern astronomer would. What is not conserved quantity? Force
Answer the following as a modern astronomer would. What is not an example of kinetic energy? Chemical
Answer the following as a modern astronomer would. A tidal force can ____________. Cause geological effects on planets and moons
A ________________ is a pattern of stars within apparent proximity to each other on the celestial sphere. constellation
_______________ constellations generally have names derived from middle eastern languages Northern Hemisphere
__________________ constellations generally have names familiar to 17th century explorers. Southern Hemisphere
What are the 4 units of distance? m, au, pc, and ly
Astronomy is the oldest of the _________ sciences with roots in ancient religions. natural
This class will focus primarily on ___________ objects such as planets, stars, asteroids, moons, dust, and techniques of astronomy. solar system
This class will also concern itself with the __________ of astronomy. history
How would you write 7,320,000 in scientific notation? 7.32x10e6
How would you write .002? 2x10e-3
10e10x10e2=....? 10e12
10e0/10e2= 10e-2
We always reserve the right to use whichever __________we find most convenient. units
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