Note: These Challenge Questions coincide with the Spring 2005 Reports challenge question #3 From: by way of Jane Duden Journey North <susamel@brounstein.com> Date: Fri Mar 11 2005 - 14:49:20 EST Isotherm migrates across the continent as temperatures warm in spring time. The robins also migrate across the continent. Since this isotherm moves it is easier for the robins to keep track of where they are through this movement. Robins like staying in cold weather and so when it gets warmer than 36 degrees, they like to go further north by continuing with this cold isotherm. Iselin Middle School/7th grade Richard Shivam Sayantan Received on Fri Mar 11 14:49:26 2005 Copyright 2005 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to jn-help@learner.org