Exam 1 (chap 1-5)
I.Multiple Choice. Select all correct answers.
1.Which of the planets known to the ancient astronomers can never be seen high overhead at night? a) Mercury b) Venus c) Mars d)Saturn e) Jupiter
2.On the first day of spring, the Sun sets a) north of west b) directly west c) south of west d) can't answer, it depends where you are on Earth.
3.One-hundred arcminutes is a) exactly 1 degree b) about 0.5 degree c) more than 1 degree d) less than one degree e) none of the above.
4.The distance the earth is from the sun is a) 1 AU b) 93,000,000 AU c) 149,600,000 AUd) 1 light-year e) none of the above
5.If the plane of the Earth's equator were not tilted with respect to the ecliptic plane, a) there would be no seasons on Earth b) the amount of daylight would be the same everyday c) the Earth's polar icecaps
would have never formed d) none of the above
6.According to the heliocentric model, the reason the planets always appear to be near the ecliptic is thata) the ecliptic is only 23.5 degrees from the celestial equator b) the planets revolve around the sun in nearly the same plane c) compared to the stars, the planets are near the sun d) the planets come much nearer to us than does the sun e) none of the above
7.If the Earth were in an orbit closer to the Sun, the a) the day would be longer b) the day would be shorter c) the year would be longer d) the year would be shorter
8.Using his newly invented telescope, Galileo discovered a) moons of Jupiter b) phases of Mercury c) sunspots d) mountains on the Moon e) stellar parallax
9.If the same net force is applied to two different masses, one with a mass of 2 kg and the other with a mass of 3 kg, a) the 2-kg mass will experience twice the acceleration of the other b) the 2-kg mass will
experience a greater acceleration than the other c) the 3-kg mass will experience a greater acceleration than the other d) the two masses will experience the same acceleration e) none of the above
10.According to Newton, the natural motion of an object is a) a circle
b) an ellipse c) a straight line d) retrograde motion
11.The gravitational attraction between an object and the Earth a) stops
just beyond the Earth's atmosphere b) extends to about halfway to the
Moon c) extends to the Moon d) extends to infinity e) depends
on the mass of the object
12.A centripetal force a) pulls outward b) pulls inward c) pulls in the
direction of motion on an object moving in a circle.
Astronomy 1Page 2
Exam 1 (cont.)
I.Multiple Choice (cont.)
13.Tides on Earth are primarily due to the mutual gravitational attraction
between the Earth and a) the Moon b) the Sun c) Jupiter
d) none of the above.
14.As an electron of an atom changes from one energy level to a higher
energy level by absorbing a photon, the total energy of the atom
a) increases b) decreases c)remains the same d) none of the above.
15.Analysis of a star's spectrum cannot determine a) the star's radial velocity
b) the star's tangential velocity c) the chemical elements present in the
star's atmosphere d) none of the above
16.The energy of a photon is directly proportional to the light's a) speed
b) wavelength c) frequency d) brightness e) none of the above
17.In the Bohr model of the atom, light is emitted from an atom when
a) an electron moves from an inner to an outer orbit b) an atom gains
energy c) an electron moves from an outer to an inner orbit d) one
element reacts with another e) none of the above
18.Which of the following features...