Agujeros negros (Black Holes)

For many years, people believed there were nine planets that orbited the sun. Now we say there are eight. What happened to the ninth planet, Pluto? What are the different planets like? What exactly makes a planet a planet? These are the many intriguing questions answered with this high-interest book, crafted to be accessible for readers of all levels. Young astronomers will be especially fascinated by the stunning photographs and the "Make the Grade" fact boxes.

Todo lo que siempre quisiste saber sobre la vida amorosa de los animales. Todos los animales, desde las peludas arañas hasta los fornidos delfines, deben aprender a seducir. ¿Cuántas maneras hay para hacerlo? Tantas como hay especies animales. Algunas de sus tácticas son tan familiares como las de los humanos, otras tan extrañas que son difíciles de creer. En una sutil fusión entre álbum ilustrado y libro de divulgación, este volumen muestra el amplio mundo de la seducción animal, desmintiendo falsas creencias y arrojando luz sobre las distintas maneras en las que se expresa el amor ...

In Planes, emergent readers learn about planes and how theyre used as a mode of transportation. Carefully crafted text uses high-frequency words, repetitive sentence patterns, and strong visual references to support emergent readers, ensuring reading success by making sure they arent facing too many challenges at once.

The environment you live in gives you what you need, but you have to really know what's around you. Through sight, hearing, and the other senses, you can understand what's going on outside your body. Lift the flaps in this visual guide full of curiosities and anecdotes, and discover how the body works from the outside!

With humor and stories collected over decades of working with teens, McFarland encourages adolescents to build a well-grounded faith which will allow them to have stability in their life and stand firm in Christ.