This book is part of a book series called Science Investigations .
This book has been graded for interest at 9-11 years.
This book was published 2008 by PowerKids Press .
Jack Challoner has written and lectured on a wide range of science topics. Dr Rodney Walshaw has worked for the British Geological Survey and edited several renowned geoscience publications.
This book is in the following series:
Science Investigations
Readers test ideas by investigating evidence from observation and measurement.
