Quiz 1. Sizes of Objects

Name: ________________________ GIVEN 8/30 ID number: ________________________

     

At left is a chart showing diameters, measured in meters, of some typical planets, stars, and galaxies, labeled by the letters `a' through `i'. Use this chart to answer the following questions:

I. Which of these objects are planets, which are stars, and which are galaxies?





      

II. Which type of object (planets, stars, or galaxies) has the greatest spread of diameters? Which type has the smallest spread of diameters?





      

III. Are the diameters of stars closer to the diameters of planets or the diameters of galaxies?





      

Extra credit: Estimate the ratio of the diameter of a typical star to the diameter of a typical planet, and the ratio of the diameter of a typical galaxy to the diameter of a typical star.






Joshua E. Barnes (barnes@ifa.hawaii.edu)
Last modified: August 30, 2001

http://www.ifa.hawaii.edu/~barnes/ast110/quizzes/quiz01.html