<p>Why does air escape from an untied balloon? <br> <br> What stops us from floating away? <br> <br> Find out the answers to these questions and more with fun experiments that show you how and why different forces work! <br> <br> This title features: <br> * Simple experiments to test basic scientific ideas <br> * Clear explanations for every experiment <br> * Amazing facts <br> * Photographs and cartoons <br> * Glossary to explain new and difficult words <br> * Notes for parents and teachers</p>
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