Construcción y arquitectura

As a land that’s constantly in flux, Earth sometimes reveals clues about the plants, animals, and other organisms that lived long ago. Fossils teach us much about what life was like millions of years ago, answering the questions of how Earth changed and maybe even why it changed. This essential Earth science topic is thoroughly explained through manageable text, fact boxes, informational charts and diagrams, and a glossary and index. Readers will become young Earth detectives by the time they’re through with this text!

Discusses the discovery and escavation of King Tutankhamen's tomb and the myth of the curse that seemed to afflict those involved in the tomb's exploration.

La lagartija despierta tras haberse quedado apaciblemente dormida en el castillo de arena. Piensa que todo ha sido un sueño, que sigue siendo un monstruo horrible. Pero cuando abre los ojos ve a un ser igual a ella, pero de distinto género: un lagartijo. Pronto se enamoran, y tiene muchos hijos con los ojos rojos. Como son muchos, ahora nadie se atreve a meterse con ellos. Y pronto las lagartijas de ojos rojos conocerán a otras lagartijas de ojos negros y se enamorarán. ¿Quién será capaz de distinguirlas entonces?

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....