Many animals live in water, but only some can be defined as fish. Twenty-eight thousand species of fish exist, each with different characteristics. Readers from grades one through four will learn that fish have a distinct impact on their ecosystem and will see how fish survive when well-adapted to an uncompromised environment. Beautiful photographs demonstrate the great diversity of fish and accompany intellectually stimulating explanations of their varying roles and traits. From page to p...

En este tomo vas a conocer la vida y costumbres del mamífero terrestre más grande que existen, después del elefante. Se trata del rinoceronte, un gran animal solitario, que a veces puede ser muy agresivo. Sabrás muchas cosas sobre su modo de defenderse, su alimentación, sus crias y sus hábitos. También aprenderás a diferenciar un rinoceronte africano de otro asiático.

The crustacean subphylum can be broken down into decapods, amphipods, copepods, and other types. This title offers readers from grades one through four comparisons between the needs and roles of different crustaceans, which will allow readers to understand the subphylum’s importance. Readers will recognize and expand their knowledge about familiar species like the lobster and the shrimp, while being introduced to the likes of the wood louse and zooplankton. Dynamic photography and methodic...

Plants and algae form an important basis of all marine ecosystems. They provide nutrients to animals that eat them and also create oxygen for humans and animals to breathe. This academic lower elementary title covers the diversity of marine plants and algae that exist as well as the processes they undergo to grow and thrive. Photosynthesis is explained in easy-to-understand language, as is the role of plants and algae in food chains and food webs. Finally, the importance of sea plants and ...

Desde el enorme tiburón ballena, el pez más grande que existe, hasta el voraz tiburón blanco, los tiburones comprenden una amplia variedad de especies que habitan en todos los mares cálidos y templados. A través de las extraordinarias fotografías y los amenos textos contenidos en este volumen, sabrás cómo vive, cómo se alimenta y cómo se reproduce cada especie y conocerás la forma de vida de la raya, un pariente próximo del tiburón, aunque de costumbres muy diferentes.

Invertebrates make up more than 90 percent of all living beings on Earth, and underwater, their diversity is apparent. Sea invertebrates include crustaceans, mollusks, jellyfish, and a host of other sea creatures that are integral to marine ecosystems and have important uses for humans, too. This colorful, photo-packed lower elementary title introduces readers to the most common sea invertebrates. Compare and Contrast boxes encourage readers to identify what traits these animals share and ...

Learn what helps a mammal survive the depths of the cold, populous oceans. Examine the adaptive features and diets of marine mammals, and explore their distinct methods of reproduction and nurturing. Learn about climate change and its risk to marine mammal and environmental preservation. Vocabulary call-outs throughout the title, along with a separate glossary after the main text, will help improve the language skills of readers, while thoughtful and comparative questions create connection...

Marine biology is both essential and inspirational to human life. The bodies of mollusks in particular allow them to live aboveground, underwater, or both, depending on the species. Readers will learn about the unique contribution oysters, squid, and slugs, all of which are different classes of mollusks, make to their habitats. Their diets, their vulnerabilities, what they leave behind, and what threatens them take shape on pages that depict what mollusks are through both stunning photogra...

Muchas aves marinas viven en el mar, lejos de las costas, y sólo se acercan a tierra para criar, como los albatros. Otras permanecen siempre cenrca de la costa y algunas se pueden encontrar en aguas dulces. En este columen aprenderás a diferenciar los principales grupos de aves marinas y, a través de las fotografías, distinguirás sus características principales. También conocerás algunas de sus costumbres, como la forma de obtener el alimento o de construir los nidos.

Out of all the water on Earth, 96 percent of it is found in the ocean. And yet, we know more about space than the dark depths of our own ocean. Dive into the wild waters of the hydrosphere to explore discoveries about our ocean's habitats, life, and zones in this engaging science book. From the abyssal plain to the continental shelf, fifth-grade readers will learn all about underwater land features, tectonic plates, currents and waves, the hydrologic cycle, the ocean's effects on climate, ...