Covering more than 70 percent of Earth's surface, the world's oceans and seas are the lifeblood of our planet — regulating climate, producing oxygen, and supporting an astonishing diversity of life. This engaging book introduces young readers to the oceans and seas of the world, exploring their geography, ecology, and vital importance to life on Earth.

Students will discover the five major oceans — the Pacific, Atlantic, Indian, Southern, and Arctic — and learn what makes each one unique. They will explore the incredible diversity of marine life, from microscopic plankton to the blue whale, and discover how ocean currents influence weather and climate around the globe. The book also covers the importance of protecting our oceans from pollution and climate change.

Aligned with geography, earth science, and social studies curricula, this book is an ideal resource for school libraries, classrooms, and independent learners. A comprehensive glossary, ocean maps, and discussion questions help students build a deep appreciation for the world's oceans and the critical role they play in sustaining life.