Jennings, Terry J

Describes why volcanoes and earthquakes occur, the chaos they cause, how they help to form mountains, valleys, and islands, and ways in which they are useful to people.

Presents simple experiments and activities to demonstrate why some things float but others sink.

Describes different objects used for measuring time and how they work. Includes activities and experiments.

Provides a brief introduction to mountains, discussing how they are created, why they are constantly changing, and how they provide a home to plants, animals, and humans.

Experiments and activities explain what primary colors are, why a rainbow is many different colors, and how animals use color.

Presents experiments and activities relating to the measurement of time, such as making a sundial, water clock, and candle clock.

Explores light and optics, covering such topics as refraction, lenses, and lasers, with related activities such as making a pinhole camera.

An introduction to the uses of weights and measurements, how standard measurements have developed, and to the instruments used to measure and weigh. Includes simple activities.

Looks at flight and different flying machines such as hot air balloons, helicopters, and airplanes, with related activities and experiments.

An introduction to different kinds of energy, including energy from fossil fuels, moving water, the ocean, solar power, geothermal power, and garbage. Includes experiments for children to learn how energy works.