Publisher's Synopsis
The scientific concepts of pushing and pulling are explained in this book which is one of a series intended to encourage children to explore the science of the world around them. The concepts are explained simply and are supported by activities on every page.;Activities are suggested using a variety of simple devices to establish the force of an object such as: the difference in resistance between a heavy and a light book; rubber bands taped on to a saucer and a plate to see which band stretches the most; a gravity test; a test to see how some objects change shape when pulled or pushed; water in an inflated balloon gushes out when holes are made in the balloon; the effect of magnets on each other; the pushing movement of a root growing in water.;These simple experiments help to understand what makes a hovercraft float, how a bow and arrow work, what happens when you squash air and what causes a tornado. There are also "test your knowledge" questions in "Did You Know" boxes.
