Biology Forums - Study Force

During a total lunar eclipse,
 
  a. the moon must be new.
  b. the observer must be in the path of totality.
  c. the moon's color will be affected by Earth's atmosphere.
  d. the moon must be at about its greatest distance from Earth.
  e. it must be near the time of one of the equinoxes.

Question 2

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true? I. Circini has a surface temperature less than the sun. II. Circini has a diameter that is greater than that of the sun. III. Circini is more luminous than the sun. IV. Circini is located near the upper left hand corner in the HR diagram.
 
  a. I & II
  b. II & IV
  c. II, III, & IV
  d. I, II, & III
  e. I, II, III, & IV

Question 3

Relative to the stars, the moon moves about _________ eastward in the sky each night.
 
  a. 1
  b. 5
  c. 13
  d. 27.3
  e. 29.5

Question 4

The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true? I. Sheat has a surface temperature less than the sun. II. Sheat has a diameter that is greater than that of the sun. III. Sheat is more luminous than the sun. IV. Sheat is located near the upper left hand corner in the HR diagram.
 
  a. I & II
  b. II & IV
  c. II, III, & IV
  d. I, II, & III
  e. I, II, III, & IV

Question 5

A third quarter moon is visible
 
  a. near the eastern horizon just before sunrise.
  b. near the eastern horizon just after sunset.
  c. in the southern sky at sunrise.
  d. in the southern sky at sunset.
  e. from sunset until sunrise.

Question 6

The ____ of a star is a measure of the total energy radiated by the star in one second.
 
  a. color
  b. apparent visual magnitude
  c. luminosity class
  d. spectral type
  e. luminosity

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Thanks for your help!!! Correct all the way through

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