Los cruceros

¿Sabías que los insectos palo se llaman ninfas cuando son jóvenes? Las ninfas cambian la piel cuando crecen. Aprende más datos fascinantes en Los insectos palo, uno de los libros de Insectos Fascinantes. Did you know that stick insects are called nymphs when they are young? Nymphs shed their skin as they grow. Learn more fascinating facts in Stick Insects, a Fascinating Insects book.

Los cangrejos ermitaños no tienen caparazón propio. Deben mudarse a caparazones más grandes a medida que crecen. Aprende estos y otros datos intrigantes en El cangrejo ermitaño, uno de los libros de Me encanta mi mascota. Hermit crabs do not have their own shells. They must move into bigger shells as their bodies grow. Learn these intriguing facts and more in Hermit Crab, an I Love My Pet book.

Diamonds and salt are both minerals, but diamonds are more rare than salt. Curious readers will learn what physical and chemical conditions must be present for minerals to form. They'll discover how minerals are identified and how they are used in daily life. Informative and interesting text presents readers with this science content in a fun way. A graphic organizer shows how different minerals are identified and fact boxes provide readers with exciting supplementary information.

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.

Presenta varios experimentos en cronometría. Para estudiantes de primaria (grados 4-6) y de secundaria (grados 7-9).

Readers learn about the various animals that need help and what they can do to make a difference through volunteerism in this engaging book. Discover different programs and organizations that work to protect animals, animal habitats, and endangered species through vibrant images and charts and informational text. Featuring a list of helpful and useful websites, this Spanish-translated nonfiction title encourages readers to take part in animal activism in any way they can--from baking homemade dog biscuits to exploring careers that help sick or injured animals.