(no subject) regina murphy (rmurphy@dca.net) Fri, 22 Oct 1999 12:39:51 -0400 Messages sorted by: [ date ][ thread ][ subject ][ author ] Next message: regina murphy: "challenge question #7" Previous message: brenda terry: "(no subject)" Challenge Question #7 "At what altitude do monarchs disappear from view? Describe a simple experiment you could do to test this. In your experiment, test the height monarchs disappear from view, both from the naked eye and when using binoculars." We figured that we can see about as far up as we can see just looking forward. Using this idea, we made a scale model of a Monarch by scanning in a picture from the National Audubon North American Insect field guide and printing out a 4 inch color picture of one. Audubon says average size is 3 and a half to 4 inches. One of us held the Monarch picture and walked away holding the picture out at arm's length until the other two of us could no longer see it. We then measured the distance to the point at which the picture disappeared. We measured 290 feet 10 inches on a hazy day. We figured a clear day with clouds in the sky would probably improve visibility somewhat. We didn't test with binoculars. Sam and Harry Hamilton Landenberg, PA Next message: regina murphy: "challenge question #7" Previous message: brenda terry: "(no subject)" Copyright 1999 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form