Every day the sun moves across the sky and it is light. You can see clouds, birds and airplanes in the daytime. Every night the moon moves across the sky and it becomes dark. You can see stars at night.  This nonfiction Beginning-to-Read book contains high-frequency words and content vocabulary. Connecting Concepts pages include a word list along with activities to strengthen early science and literacy skills, such as understanding nonfiction text, science in the real world, science and academic language, fluency, and finding further information. Aligns with Next Generation Science Standards for Grades K-3.