Space vehicles are out of this world! But how do they fly out into space? How do they carry people safely? And what parts do these amazing aircraft have? Find the answers inside this book!
Parachutes can be used for emergency landings. But they can also be used for flying fun! Who packs a parachute? And how does its light fabric keep you afloat? Discover the answers inside this book! Le
A huge tan cat with black spots on its fur crouches in the grass. Its long tail twitches as it hunts for food. Did you just see a cheetah? Or was it a leopard? These animals look very similar, but th
Robots work in homes every day. Some vacuum floors or mow lawns. Others keep people company. And some help kids have fun! What robots might you find in someone's home? Read this book to find out!
Robots help us understand our weather and climate. Some fly into storms to measure wind. Others dive into the ocean to learn about weather patterns. And some drive across frigid polar regions to gathe
Robots help us understand our universe. Some fly to distant planets. Others work alongside astronauts in space. And some drive across the surface of Mars. How do these robots work, and what are they d
Introduces the role of consumers, producers, buyers and sellers in the marketplace; discusses the relationship between cost and benefit; and includes information on supply and demand.
Robots help people in many situations. Some robots rescue people trapped by tornadoes or earthquakes. Others explore volcanoes and the seafloor. And some help scientists protect our environment. How m
Describes friction, explains why smooth and rough surfaces provide different levels of friction, and includes information on air resistance and lubrication.
What animal flies, has sharp claws, and hangs upside down to rest? Bats! But do you know what bats do at night? Or how they find food? Read this book to find out! Learn all about different animals in
