Walpole, Brenda

Uses a question and answer format to present information about time and the seasons, such as how to split a second, who invented our calendar, and why the moon changes shapes.

Discusses the elements of time and various ways to measure it, from shadow clocks and digital watches to calendars and time zones.

Discusses the elements of temperature, from sunlight and thermometers to water vapor and insulation, and examines ways of measuring temperature.

Discusses different aspects of speed and describes how it is measured on land, in the water, and in the air. Includes activities that investigate the speeds of light and sound, the effect of friction, and more.

Discusses the elements of size, including height and weight, and explores various ways of measuring area, volume, and mass. Includes simple experiments such as observing the expansion of ice.

Explains the elements of distance, from body measures to standard systems, furlongs and calipers, scale drawings, maps, and perspective.

Presents experiments demonstrating such aspects of light as shadows, reflection, refraction, lenses, optical illusions, and color.

Introduces the concept of hearing and suggests activities which reinforce the understanding of this sense.

Introduces the concept of seeing and suggests activities which reinforce the understanding of this sense.

Introduces the concept of touch and suggests activities which reinforce the understanding of this sense.