A marble has a diameter of 2 cm. At what distance would the marble have an angular diameter of 1 arc ...

A marble has a diameter of 2 cm. At what distance would the marble have an angular diameter of 1 arc second?
 
  a. 4.1 cm
  b. 4.1 miles
  c. 4.1 m
  d. 4.1 ft
  e. 4.1 km

Question 2

The Moon has an angular diameter of 0.5. What is the Moon's angular diameter in minutes of arc?
 
  a. 0.5
  b. 30
  c. 50
  d. 1800
  e. 60.5

Question 3

At sunset, the ____ Moon phase will be highest above the southern horizon for an observer in the Northern Hemisphere.
 
  a. new
  b. waxing crescent
  c. first quarter
  d. full
  e. third quarter

Question 4

During a total lunar eclipse, which of the following are true? I. The photosphere of the Sun is obscured by the Moon. II. The Moon is in Earth's umbra. III. The Moon is new. IV. The Moon is full.
 
  a. I, III
  b. II, IV
  c. I, II, III
  d. II, III
  e. I, II, III, IV

Question 5

Which of the following is not visible during totality of a total solar eclipse?
 
  a. the corona of the Sun
  b. the chromosphere of the Sun
  c. prominences
  d. the photosphere of the Sun
  e. All of the other choices are correct.