Learn about the different uses of levers. How does it work and why? These fun science books answer kids' questions about the world around them-and encourage them to ask more.
Discusses ramps, what they are and what they do. How does it work and why? These fun science books answer kids' questions about the world around them-and encourage them to ask more.
Discover what happens when pieces of rock, dust, and ice that are floating in space stop orbiting the sun. These leftovers are known as comets, asteroids, and meteoroids.
Describes in simple text the moon's gravity, surface, and phases; visits to the moon; and the relationship between the moon and ocean tides; and includes instructions for making a homemade crater.