Additional online reading Welcome to BFSU: › Forums › Volume One › Learning Progression “D”: Earth and Space Science › Lesson D-6. Seasonal Changes and the Earth’s Orbit › Additional online reading Tagged: Enhancement This topic has 1 reply, 2 voices, and was last updated 9 years, 5 months ago by Jennywren. Viewing 1 reply thread Author Posts November 8, 2014 at 12:35 pm #416 Bernard NebelKeymaster An explanation of bird songs http://schoolsites.schoolworld.com/schools/ESP/student_life.cfm?subpage=295870 April 25, 2015 at 3:38 pm #466 JennywrenParticipant Nice little video by the BBC of how the Earth’s orbit affects the seasons. http://www.bbc.co.uk/education/clips/z6vfb9q Author Posts Viewing 1 reply thread You must be logged in to reply to this topic.