In the Van Cleave tradition, this book presents 101 experiments that are simple, yet informative, and can easily be performed in the home. The book covers seven major segments: Earth in Space, Rocks and Minerals, Crustal Movement, Erosion, Atmosphere, Weather and Oceans. Some experiments are designed to demonstrate, with simple objects, properties of the earth and its components such as "how the composition of the Earth affects its motion" and "how the speed and direction of air affect falling rain." These type of experiments generally cover things which can't be directly experimented with but can be understood through other things. Other experiments determine actual properties by experimenting with salt, water, ice, etc. to more directly understand how they work.