Question

Explain the cause of the Earths' season.

I need a diagram for my explanation
Ms. Sue
http://images.google.com/images?hl=en&rlz=1G1GGLQ_ENUS362&q=earth+seasons+diagram&um=1&ie=UTF-8&ei=GHeuS7u4NMH88Aak3Ii2BA&sa=X&oi=image_result_group&ct=title&resnum=1&ved=0CA8QsAQwAA


drwls
Most textbooks have one, even in elementary school. What grade level and school system is this?