Activity #2: Angular Measure, Moon, & Eclipses Name: _______________________________________________ Score: ________________________________ 1. The angular size of your finger at arm's length is about 1. How many arcseconds is this? _____________________ arcsec Write as a regular number. [Hint: How many arcseconds in an arcminute? How many arcminutes in a degree?] [5 pts] Show your work (use dimensional analysis): [10 pts total] [Work = 5 pts] 2. As the Moon orbits the Earth, it moves about 13.2 per day. Over the course of a calendar week (Sunday through Saturday), how many degrees will it have moved? ______________________ [5 pts] Show your work (use dimensional analysis): [10 pts total] [Work = 5 pts] 3. (a) At 8 a.m., the Moon is visible with half its face dark and the other half a ghostly white against the morning blue sky. What phase is the Moon in? [Part a = 5 pts] New Waxing crescent First quarter Waxing gibbous Full Waning gibbous Third quarter Waning crescent (b) As you look at the Moon, which side is visible (bright)? Left Right [Part b = 5 pts] 4. During the course of a day, the Moon will appear to rise in the east, cross the sky, and