How do cool temperatures affect the activity of a fish? Do earthworms prefer to live in light or darkness? Do weeds interfere with the growth of other plants? Readers will find the answers by doing the fun and simple experiments in this book. Many ideas for science fair projects are also included.

Describes the use and effects of both legal and recreational narcotic drugs, including their history, narcotic addiction and abuse, treatment of addiction, and government efforts eliminate the use and trafficking of illegal drugs.