¿Por qué hibernan los animales? (Why Animals Hibernate)

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.

The rock cycle has been taking place for millions of years. However, geologists have only known about this phenomenon for about 300 years. Young terrestrial explorers are introduced to different types of rocks, where in the cycle these rocks fit, and where in Earth's layers each step takes place. Fact boxes provide readers with fun additional information. A diagram helps readers make sense of the new information they're learning.

How does a frog grow? Beginning as a tiny egg and then a tadpole, a frog stays mostly in the water until it is fully grown.

“Al tener el armario vacío, pude observar en el fondo del lateral derecho una hendidura que me produjo curiosidad, porque pensé que se estaba estropeando, aunque las condiciones de temperatura y humedad eran óptimas para su conservación. Pasé los dedos por ella y vi una tabla que se diferenciaba, por la veta de la madera, del resto del suelo del armario; insistí tocando y estuve segura de que aquella tabla se podía levantar.” Demonios en el armario propone una búsqueda del ser a partir de una trama entretenida y una prosa fluida. María Montesinos, protagonista de la historia,...

This workbook provides students with extra practice as they explore the five themes from the new IB Diploma Language ab initio guide (first examination 2020): identities, experiences, human ingenuity, social organisation and sharing the planet. It helps students further develop their Spanish language skills with additional exercises that complement the activities in the coursebook, with a focus on grammar and vocabulary. The workbook is ideal for teachers needing differentiated exercises for their class and can be used for independent study and revision. Answers to the workbook activities are ...

Ariadna tiene el corazón dividido: como un fuego se ha encendido su amor por Teseo, el joven llegado desde Atenas para matar al Minotauro o morir en el Laberinto. ¿Qué debe hacer? ¿Debe dejar que Teseo se pierda para siempre en el palacio de los cien intrincados pasillos? ¿O bien debe ayudarlo a matar a su hermano y luego huir con él de la cruel Creta? Pero, ¿pueden realmente decidir los hombres o son los dioses quienes tejen el frágil hilo de su destino?