El calor (Heat)

The US president is the face of the United States to the rest of the world. However, he or she doesn’t have unlimited power within the country. The president has certain powers given by the Constitution, including the ability to make treaties, appoint some important government officials, and veto laws. Readers learn the many duties of the president in simple, clear language appropriate for both younger readers and older readers looking for a succinct review of the topic. Fact boxes supplement the main content with important details about checks and balances, amendments, and more that affect...

En este libro con partes móviles para niños, Buz la abeja rezumba por aquí y por allá en busca de un amigo con quien jugar. Habla con caracoles, orugas, escarabajos, hormigas, catarinas, y mariposas pero todo el mundo está muy ocupado.

Presents information about super jumbo jets, looking at the history and development of jets, discussing various aspects of design and construction, and exploring different types of jets, including the Concorde and the Airbus A380.

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!

What substance can act like both a solid and a liquid? Slime! Want to find out how to make your own? Just follow the simple steps inside this book