Células (Cells)

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

How do we know when it's time to eat? Sometimes, it's because we smell something yummy cooking! Early readers dive nose-first into the world of the smells around them, including bad smells like a garbage dump or good smells like apple pie. Accessible language and strong picture-text correlation introduces readers to all of the things the nose knows!

La Geología es una ciencia sumamente atractiva ya que abarca cuestiones trascendentales relacionadas con nuestro planeta: su origen, su formación, la vida en tiempos pasados y los procesos actuales de evolución, en la que los seres humanos intervenimos de manera activa. En este volumen se analiza, además de su origen y formación, la estructura de la Tierra, la composición de la atmósfera, la deriva de los continentes, los volcanes, la formación del relieve, los glaciares, el mar, el ciclo geológico y los mapas.

Our toilets toil away for us every day. Yet, they get little thanks for their hard work! When you think of toilets, you probably picture one in your home. But, toilets can be very different around the world. At first glance, a toilet is a simple device, but they are critical for proper sanitation. There are many people worldwide who do not have access to a toilet. Let's dive into an exploration of the history, importance, and inner workings of toilets! This Spanish book combines math and literacy skills and uses everyday examples of problem solving to teach subject area content. The...