"Introduces the oxygen cycle and its impact on Earth. Readers will gain insight into how oxygen is created and used, what happens when it combines with other elements, and how human activities have impacted the cycle"--Provided by publisher.

Audisee® eBooks with Audio combine professional narration and text highlighting to engage reluctant readers! Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

Introduces the rock cycle and its impact on Earth, including the three basic forms of rocks, how they are formed, and how they change into each other.

"Introduces the water cycle and its impact on Earth. Readers will gain insight into how water moves around Earth, what water is made from, and how climate change impacts the cycle" -- www.childsworld.com.

Introduces the life cycle of animals, including different types of animals, how they grow and change, and the pattern of life and death.

What does it mean to migrate? Discover which animals migrate and why they migrate through detailed photographs and simple text.

"Readers follow along as the moon shifts from new to full and back again, learning the words for each lunar phase and how the sun's light creates the different moon shapes they see in the sky"--

"Emerging readers learn about the qualities of and vocabulary associated with the four seasons"--

Introduces the idea that many things in the world around us are cyclical in nature and discusses the water cycle from puddle to cloud to rain to puddle again --Provided by publisher.

"Zebras travel across the Kalahari Desert each spring in search of food. Whales swim to warmer water every winter. Take a journey to discover the wonders of migrating animals, including why they migrate and how far they travel."--