Trenes de Alta Velocidad (Bullet Trains)

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins.

¡Descubre a Olivia, la protagonista de una serie de cómics repleta de aventuras, misterio, acción, personajes divertidos, un toque de magia, ecología y mucho humor! Con lo tranquila que estaba Olivia en la ciudad, y a sus padres les ha dado por mudarse a un pueblo en la montaña, en mitad de la nada. Y todo porque su madre tiene que salvar a la región de una devastadora invasión de pájaros gigantes. Qué rollo de verano, por aquí no hay nada con lo que entretenerse... ... Salvo una misteriosa pastora y sus lanosos perros lanosos, un par de monstruos y un genio sivergüenza. ¡Parece...

Introduces different kinds of light, the properties of light, and how light can create shadows of different shapes and sizes.

This book gives students an in-depth look at how large telescopes work. The wonder and awe of space and the scientific instruments we use to study it both come shining through in this fascinating book. Full-color diagrams and illustrations will help students visualize how the technology of telescopes works. Students will learn about the creation of mirrors 8 meters wide and telescope teams that work together to create a telescope as powerful as if it had a mirror the size of the Earth!