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LAB final Flashcards

(85 cards)

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1
Q

At what position from the Sun does a planet move the fastest?

A

perihelion

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2
Q

If the sun sets south of west for an observer in the southern hemisphere, which of the following is true?

A

The sun will be in the sky longer than 12 hours.

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3
Q

During the course of an evening…

A

the moon basically stays at the same phase.

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4
Q

The speed of a planet in orbit is

A

sometimes speeding up and sometimes slowing down.

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5
Q

Ptolemy introduced _________ to help explain retrograde motion.

A

epicycles

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6
Q

During the first quarter phase, how much of the face of the moon that we see is illuminated by the sun?

A

50%

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7
Q

What kind of star is the star in the horizon diagram?

A

Circumpolar (diagram of star across from person)

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8
Q

What is the phase of the moon depicted?

A

waning gibbous (located down and to the left)

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9
Q

According to the HR diagram, the faintest stars are found

A

at the bottom.

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10
Q

When an inferior planet is as far from the Sun (in angular separation) as it ever gets, the planet is said to be at

A

greatest elongation

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11
Q

Which of the following best estimates the time period between new moon and new moon?

A

30 days

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12
Q

Which of the 50 states defines the farthest extent of the United States to the South?

A

Hawaii

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13
Q

What is the coordinate feature indicated in the figure?

A

Vertical Circle (circle equal and above the equator)

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14
Q

At what locations can the Sun be at your zenith during some part of the year? (from your student guide)

A

Only between 23.5º N and 23.5º S

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15
Q

When viewed from above the North Pole, which way does the Earth rotate? (from your student guide)

A

counter-clockwise

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16
Q

Which of the following look most like the orbit of Venus?

A

The most circular one

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17
Q

When a superior planet is on the far side of the Sun at an elongation of 0°, the planet is said to be at

A

conjunction

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18
Q

An inferior planet can never be in opposition.

A

True

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19
Q

How long does it take a planet to orbit the sun exactly once?

A

Sidereal period

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20
Q

What is the name of the line shown in the figure?

A

line runs through South Africa (Tropic of Capricorn)

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21
Q

During a new moon what percent of the moon’s entire surface (irrespective of how much we can see) is illuminated by the sun?

A

50%

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22
Q

When determining the luminosity of a star, what variable has the largest impact on the value of the luminosity?

A

Temperature

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23
Q

The sun rises highest ( its maximum altitude during the day is greatest) in our sky (assume a mid United States latitude) on …

A

June 21

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24
Q

Which of the following is closest to the speed of light in a vacuum?

A

3.00 × 10^8 m/s

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25
All of the bodies below have reasonably close escape velocities. Which body has an atmosphere?
Titan
26
How is the energy of a photon related to the photon's wavelength?
inversely proportional
27
What region is indicated by the shaded region?
(shaded portion down and to the left) never rise
28
Using the graph, a planet with a semimajor axis of 10 will have an orbital period of about
32 years
29
What is the time of day depicted in the figure?
WRONG 6am
30
If the moon is at its highest point at 12 AM…
it rose at about 6 PM and will set at about 6 AM.
31
(from page 7 of the student guide) Why do the brightest stars in the sky actually appear as the brightest? Three students debate this issue. Which student is correct?
Student B: “I think it’s because these stars are very luminous. They are putting out a tremendous amount of energy.”
32
Which of the following is not part of Kepler's contribution to planetary orbits?
gravity
33
Sidereal period is the time it takes for a planet to
complete 1 orbit around the sun.
34
What is the configuration shown?
straight line diagram WRONG inferior conjunction
35
How long does it take a planet to orbit the sun exactly once?
Sidereal period
36
According to the HR diagram, large blue stars are found
at the upper left.
37
On what date does a location at 23.5º N receive the most direct sunlight? (from your answers on the student guide)
June 21
38
An electron has what kind of charge?
negative
39
Select all of the following which are true in the summer months (for the northern hemisphere).
PARTIAL The sun rays are more direct and thus felt more intensely The northern hemisphere of the earth is tilted towards the sun
40
For a lunar eclipse (the moon is obscured from view), which phase is necessary?
full moon
41
Based solely on the order of the planets, which planet has a shorter sidereal period, Mercury or Mars?
Mercury
42
What kind of planet is a superior planet?
Those planets farther from the sun than the earth.
43
The acceleration of a planet is
always towards the sun.
44
How much of the celestial sphere is visible for an observer at 0° S at any one instance?
50%
45
What time of day is the new moon highest?
12 PM
46
On the vernal equinox the sun sets directly west. Where will the sun set two weeks later?
north to west
47
What is the phase of the moon depicted in the diagram?
SUNLIGHT>earth>moon = FULL
48
If Star A has a mass of 3 M⊙ and star B has a mass of 1 M⊙, the center of mass will be at which letter position?
WRONG Y
49
What happens to the synodic period of a planet if it is moved closer to the earth?
The synodic period would be longer.
50
Which of the following types of light has the highest frequency?
Gamma ray
51
If a moon is between 50% and 100% illuminated it is a…
gibbous moon.
52
What kind of particle has a neutral charge?
neutron
53
Which of the following types of light has the longest wavelength?
Infrared
54
Which of the following coordinates or coordinate feature does NOT belong to the Celestial Equatorial Coordinate System?
Latitude
55
According to the HR diagram, the hottest stars are found
on the left side.
56
The speed of a planet in orbit is
sometimes speeding up and sometimes slowing down.
57
The image shows a line that all have the same value of what coordinate?
WRONG right ascention
58
What is the configuration shown?
WRONG conjunction (looks like a sideways L)
59
What kind of planet is an inferior planet?
Those planets closer to the sun than the earth.
60
Which surface is most efficiently receiving energy from the sun?
A (straight up and down)
61
The moon depicted here is what phase.
backwards C= waxing crescent
62
If a planet has an orbital radius four times earth's, what will its period be?
eight times as much (graph)
63
If the Earth rotated more rapidly, it solar day would be ________________. (from your student guide)
shorter
64
If Star A has a mass of 1 M⊙ and the center of mass is at position Y, what is the mass of star B? M⊙
3
65
Which of the following best estimates the time period between new moon and new moon?
30 days
66
For a planet in an elliptical orbit to “sweep out equal areas in equal amounts of time” it must …
move fastest when near the sun.
67
The highest point in the sky (directly over your head) is referred to as your
zenith
68
Match the words with their correct description. (from your student guide)
waning-decrease in magnitude waxing- to increase in size gibbous- convex
69
What is the coordinate feature indicated in the diagram?
Nadir (directly underneath person, looks like southpole)
70
How many hours of sunlight does the North Pole receive on December 21? (from your student guide)
0
71
On what date does a location north of the equator receive the least direct sunlight?
December 21
72
The sun rises lowest ( its maximum altitude during the day is smallest) in our sky (assume a mid United States latitude) on …
December 21
73
If the moon is illuminated on the left-hand side it is…
waning
74
Which of the 50 states defines the farthest extent of the United States to the North?
Alaska
75
If Star A has a mass of 3 M⊙ and the center of mass is at position W, what is the mass of star B? M⊙
WRONG 6
76
The orbital period of Mars is
longer than earth's orbital period because it is farther from the sun.
77
An observer at 15° S will see predominately what type of star?
rise and set
78
What is the name of the line shown?
Prime Meridian (through England)
79
On which of the following dates will an observer at 85° N see the sun above the horizon all day long?
June 21
80
At what position from the Sun does a planet move the slowest?
aphelion
81
Is the moon in the figure currently visible to the observer?
NO - diagram has yellow dot under and to the right
82
What is a “particle” of light called?
photon
83
Over the course of a month, about how much of the moon’s surface can be photographed?
50%
84
Match each law with the proper description.
newtons law- only a force acting on a object keplers 2nd- plantets move faster closer to the sun keplers 1st-planets orbiting elliptically keplers 3-plantets with large orbits
85
If Star A has a mass of 2 M⊙ and star B has a mass of 4 M⊙, the center of mass will be at which letter position?
WRONG Z

astronomy (3 decks)

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