Questions and answers about oceans & ocean life. From simple questions like "Which is the largest ocean?" to more complex ones like "What causes high tides?", this book delivers the answers kids want. Whether they live near the ocean, visit the beach during vacations, or learn about ocean life at school, kids are fascinated by and curious about the ocean and its shores. This book gives them an introduction to basic oceanography with explanations of everything from waves to deep-sea diving. It addresses environmental issues by emphasizing the ways plankton, wetlands, and coral reefs help maintain delicately balanced ecosystems.