Vogel, Julia

"Busy people need to keep track of time. A clock is used to measure seconds, minutes, and hours. Learn about different types of clocks and the history of clocks in 'Clock.'"--Back cover.

Text and pictures introduce young readers to the science of energy.

Text and pictures introduce young readers to the science of electricity.

Text and pictures introduce young readers to the science of air.

Details the natural history, life cycle, physical characteristics, habitat, diet, and mating of wild horses throughout the world.

Introduces students to solar power, describing what it is and what role it plays in the world.

Explains how to answer questions about the amount of something by measuring volume; describes the development of standard measurement and the metric system; and introduces the main units in the customary system and measuring solids.

Readers learn what temperature is and why and how it is measured. They learn about the Celsius and Fahrenheit scales and where each is used. Readers learn about thermometers and how they help us in everyday life--from taking body temperatures to regulating how cool or warm our homes are.

A calendar can help people to count how long it is until their birthday. Calendars measure days, weeks, months, and years. Learn about different types of calendars and the history of measuring days, weeks, months, and years in "Calendar".