National Geographic Readers: Los Gatos vs. Los Perros (Cats vs. Dogs)

The asteroid belt between Mars and Jupiter is an intriguing area of our solar system. Scientists have counted over 670,000 known asteroids there, but there could be millions more not yet found. Readers will discover much more about the asteroid belt in this highinterest book, which blends science and math. They'll read about several topics, such as space missions to the asteroid belt and the difference between an asteroid and a planet, and solve associated math problems-just like actual space scientists do!

Una traición y dos guerras devastaron su pasado, una identidad encubierta la precipitó al futuro. La joven modista Sira Quiroga abandona Madrid en los meses previos al alzamiento, arrastrada por el amor desbocado hacia un hombre a quien apenas conoce. Juntos se instalan en Tánger, una ciudad mundana, exótica y vibrante donde todo lo impensable puede hacerse realidad. Incluso, la traición y el abandono. Sola y acuciada por deudas ajenas, Sira se traslada a Tetuán, la capital del Protectorado español en Marruecos. Con argucias inconfesables y ayudada por amistades de reputación dudosa,...

An introduction to the night sky, describing major constellations and the planets of the solar system.

Helps students successfully pass written and oral examinations, offering techniques for memorizing, creating, and summarizing all kinds of texts.