Review for Astronomy 2 Midterm and Final

Midterm covers first 70 questions, Final covers all 105.

1. 

A finger, held at arm’s length, fills an angle of about 

 

A.  

10 degrees.

 

B.  

2 degrees.

 

C.  

one tenth of a degree.

 

D.  

40 degrees

 

E.  

50 degrees.

2. 

The coordinate used in the terrestrial coordinate system to indicate angular distance north or south of the equator is 

 

A.  

longitude.

 

B.  

declination

 

C.  

altitude.

 

D.  

latitude.

 

E.  

azimuth.

3. 

The angular distance measured eastward from north around the horizon is 

 

A.  

azimuth.

 

B.  

right ascension.

 

C.  

declination

 

D.  

altitude

 

E.  

longitude

4. 

The azimuth and altitude of an object located due north and on the horizon are 

 

A.  

azimuth 180 degrees, altitude 180 degrees.

 

B.  

azimuth 0 degrees, altitude 0 degrees.

 

C.  

azimuth 0 degrees, altitude 180 degrees.

 

D.  

azimuth 90 degrees, altitude 0 degrees.

 

E.  

azimuth 90 degrees, altitude 90 degrees.

5. 

What are the altitude and azimuth (in degrees) of a star that is setting in the southwest? 

 

A.  

altitude 0, azimuth 240

 

B.  

altitude 30, azimuth 180

 

C.  

altitude 90, azimuth 90

 

D.  

altitude 45, azimuth 360

 

E.  

altitude 315, azimuth 0

6. 

The north circumpolar region of the sky is centered approximately on 

 

A.  

the horizon.

 

B.  

the zenith.

 

C.  

the Sun.

 

D.  

The Big Dipper.

 

E.  

Polaris.

7. 

The angular size of the Moon is about 

 

A.  

½ mile.

 

B.  

½ second of arc.

 

C.  

½ radian.

 

D.  

½ minutes of arc.

 

E.  

½ degree.


 

8. 

How many seconds of arc are there in a degree? 

 

A.  

60

 

B.  

3600

 

C.  

360

 

D.  

90

 

E.  

206265

9. 

The north-south line that passes directly overhead is the 

 

A.  

zenith.

 

B.  

ecliptic.

 

C.  

azimuth.

 

D.  

meridian.

 

E.  

horizon.

10. 

Which of the following is true? 

 

A.  

A sidereal day is about 4 minutes longer than a solar day on the Earth.

 

B.  

A sidereal day is equal to a solar day on the Earth.

 

C.  

A sidereal day is equal to a solar day on Venus.

 

D.  

A sidereal day is about 4 minutes shorter than a solar day on the Earth.

 

E.  

A sidereal day is the same for all planets.

11. 

Suppose there is a star that rises at 10 p.m. tonight. At what time will it rise one month from now? 

 

A.  

9 p.m.

 

B.  

midnight

 

C.  

11 p.m.

 

D.  

8 p.m.

 

E.  

7 p.m.

12. 

On the first day of Spring, the Sun is on the 

 

A.  

north celestial pole.

 

B.  

zenith.

 

C.  

meridian.

 

D.  

nadir.

 

E.  

celestial equator.

13. 

During retrograde motion, the motion of a planet relative to the stars is generally 

 

A.  

eastward.

 

B.  

northward.

 

C.  

southward.

 

D.  

westward.

 

E.  

random.

14. 

Relative to the stars, the Moon 

 

A.  

moves eastward, then westward during a month.

 

B.  

moves westward.

 

C.  

moves westward, then eastward during a month.

 

D.  

moves eastward.

 

E.  

remains stationary.


 

15. 

At approximately what time does the new Moon set? 

 

A.  

sunset

 

B.  

it never sets in Rocklin

 

C.  

noon

 

D.  

sunrise

 

E.  

midnight

16. 

Something that is 1000 km away has an angular size of 2 seconds of arc. Approximately how big is it? 

 

A.  

10 m

 

B.  

10 cm

 

C.  

1 m

 

D.  

1 km

 

E.  

100 m

17. 

An object with an angular size of 1 degree moves 10 times farther away. What is its new angular size? 

 

A.  

10 minutes of arc

 

B.  

6 minutes of arc

 

C.  

33 seconds of arc

 

D.  

10 degrees

 

E.  

10 seconds of arc

18. 

What object was located at the center of Aristarchus’s model of the solar system? 

 

A.  

the Moon

 

B.  

the equant

 

C.  

the central fire

 

D.  

the Earth

 

E.  

the Sun

19. 

How did Eratosthenes determine the circumference of the Earth? 

 

A.  

by asking Zeus.

 

B.  

by assuming that the Earth and Moon are the same size

 

C.  

by noting the size of Earth’s umbral shadow

 

D.  

by sailing around it

 

E.  

by comparing the altitude of the Sun at different locations

20. 

In Ptolemy’s model of the solar system, the circle on which the center of the epicycle moved about the Earth was called the 

 

A.  

focus.

 

B.  

deferent.

 

C.  

eccentric.

 

D.  

capital.

 

E.  

equant.

21. 

For what two planets is greatest elongation less than ninety degrees? 

 

A.  

Jupiter and Saturn

 

B.  

Mercury and Venus

 

C.  

Venus and Jupiter

 

D.  

Mars and Saturn

 

E.  

Saturn and Mercury


 

22. 

What is the angular size of a 2 cm diameter coin at a distance of 1 km? 

 

A.  

4’

 

B.  

40’

 

C.  

4”

 

D.  

40”

 

E.  

4 degrees

23. 

Which of the following is one of Kepler’s Laws of Planetary Motion? 

 

A.  

The orbit of a planet is an ellipse with the Sun at on focus.

 

B.  

The planet’s distance cubed is proportional to its distance squared.

 

C.  

The parabola is a kind of conic section.

 

D.  

An object in motion remains in motion.

 

E.  

Acceleration is proportional to unbalanced force.

24. 

The point of closest approach of a planet to the Sun is called the 

 

A.  

epicycle.

 

B.  

focus.

 

C.  

aphelion.

 

D.  

inferior conjunction.

 

E.  

perihelion.

25. 

What object is located at one focus of the orbit of the planet Mars? 

 

A.  

Saturn

 

B.  

Mars

 

C.  

the Sun

 

D.  

Jupiter

 

E.  

the Earth

26. 

According to Kepler’s laws, a planet moves fastest in its orbit when it is 

 

A.  

farthest from the ecliptic.

 

B.  

nearest the Sun.

 

C.  

farthest from Earth.

 

D.  

midway between the foci of its orbit.

 

E.  

nearest the Earth in the Earth’s orbital plane.

27. 

A hypothetical planet orbits the Sun a distance of 4 AU. What is its orbital period?