Experimentos sorprendentes con la luz

In 1848, gold was discovered in California, attracting over 300,000 people from all over the world, some who struck it rich and many more who didn't. Hear the stories about the gold-seeking 'forty-niners!' With black-and-white illustrations and sixteen pages of photos, a nugget from history is brought to life!

"A kindergarten-level introduction to polar bears, covering their growth process, behaviors, the habitats they call home."--

An expertly written Spanish B course now updated for first examination 2020, providing students with thought-provoking materials to help them develop strong language skills and solid critical thinking. The coursebook helps students develop their Spanish language skills as they explore the five themes from the new IB Diploma Language B guide: identities, experiences, human ingenuity, social organisation and sharing the planet. Each unit begins with 'big questions' that get learners thinking about global topics such as, 'how do we express our identity?' These help students appreciate wider...

"This oversized book introduces children to the alarming number of species that are endangered, threatened or, unfortunately, extinct. It includes amphibians, birds, mammals, reptiles, and fish, devoting an entire page to each animal. Readers will learn the threats facing each one, where each one lives or lived, including the type of habitat, its diet, size, and ongoing conservation efforts."