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Which of the following has the largest size?
A) a star
B) a planet
C) a meteoroid
D) a globular star cluster
“The average distance from the Earth to the Sun” is the definition of the...
C) Astronomical Unit
The four seasons-fall, winter, spring, and summer-are due primarily to…
A) changing temperatures of the Sun.
B) the varying distance from the Earth to the Sun.
C) the same side of the Moon being always turned toward Earth.
The path of the Sun among the background stars is called the...
C) elliptic path
D) celestial equator
E) None of the above
HW 1 (05)
Aristotle and Ptolemy held that...
A) the center of the universe is the Milky Way.
B) the center of the universe is Earth.
C) the center of the universe is Venus.
D) the center of the universe is the Sun.
E) there is no center.
Which model predicted that Venus would exhibit nearly all phases (like the Moon; New, 1st Quarter, Full, 3rd Quarter)?
A) The geocentric model
B) The heliocentric model
C) Both the geocentric and the heliocentric models
D) Neither the geocentric nor the heliocentric model
If the Earth's axis were tilted more with respect to the ecliptic...
A) length of day longer
B) length of year longer
C) length of year shorter
D) summer hotter & winter colder (central US)
E) summer cooler & winter warmer (central US)
Copernican explanation for retrograde motion requires that planets ______ Sun have longer periods of _______
A) closer to; revolution
B) closer to; rotation
C) farther from; rotation
D) farther from; revolution
A scientific theory could …
A) Be proven false, but could not be proven true.
B) Be proven true, but could not be proven false.
C) Neither be proven true nor false.
D) Be proven true, but also could be proven false.
Which of the following lists the men in the order in which they lived?
A) Aristotle, Ptolemy, Copernicus, Galileo, Newton
B) Ptolemy, Aristotle, Copernicus, Newton Galileo
C) Aristotle, Copernicus, Ptolemy, Galileo, Newton
If you triple the distance between two objects, how will the gravitational force exerted by one on the other be changed?
A) It would be reduced to 1/4 as much.
B) It would be reduced to 1/2 as much.
C) It would be reduced to 1/9 as much.
D) It would be reduced to 1/16 as much.
The discovery of the moons of Jupiter lent support to...
A) the geocentric system.
B) the heliocentric system.
If you apply equal forces to a cement truck and a compact car...
A) the cement truck will accelerate more.
B) the compact car will accelerate more.
C) they will accelerate equally.
EX 2 (28)Water ice makes the bulk of both Martian polar caps.
EX 3 (08)A star leaves the main sequence when...
A) the “helium flash” occurs.
B) the core starts fusing helium by the triple alpha process.
C) its core of hydrogen is depleted.
D) photo-disintegration starts to take place.
A) has been decreasing since they were first recorded by Galileo.
B) has been increasing since they were first recorded.
C) changes with a cycle of about eleven years.
D) changes with a cycle of about 104 years.
EX 3 (41)Cepheid variables are important because there is a relationship between their..
A) period of pulsation & distance from Sun
B) average absolute magnitude & distance from Sun
C) average absolute magnitude & proper motion
D) average absolute magnitude & period of pulsation
E) Doppler shift & distance from the Sun