Note: These Challenge Questions coincide with the Spring 2005 Reports Challenge Question #6 From: by way of Jane Duden Journey North <susamel@brounstein.com> Date: Mon Apr 11 2005 - 09:36:37 EDT Tulips need a temperature of at least 40 degrees F. Robins travel at the 36 degree isotherm. These temperatures are quite close. In the United States, most regions around springtime, get this temperature. Therefore, robins and tulips arrive in the U.S. in a similar pattern. Iselin Middle School/7th grade Richard Sayantan Shivam Received on Mon Apr 11 09:36:43 2005 Copyright 2005 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to jn-help@learner.org