water

One of the most important plant parts is something we can’t always see: Roots! This volume shows readers why roots are essential to plant growth and survival. Key topics include roots’ role in taking in water, anchoring plants in the ground, and more. Highly detailed color photographs allow readers to see this often hidden plant part, which encourages readers to visualize what they’re reading. Age-appropriate text supports elementary science curricula.

Simple text and illustrations explore why ice cubes float.

An introduction to the water cycle, looking at how water changes form as it circulates, and featuring visits to the United Kingdom's wet Peak District, the Hoover Dam, and other related locations.

Bill Nye the Science Guy answers questions about ocean exploration, and conducts an experiment to demonstrate water pressure at different levels.

Shows how bacteria are harmful and helpful to human beings, covering such topics as disease, digestion, air and water pollution control, and the treatment of muscle disorders.

Discusses the world's finite supply of water as it circulates through the water cycle. Describes how people use water to do work, how people can conserve water, and why it's important.

Explores the ways that wind and water cause erosion on Earth and change the landscape over time.

Presents a discussion of the environmental, economic, and health effects of water pollution and scarcity, and covers conservation efforts and measures such as the Clean Water Act of 1972 and the construction of desalination plants, with commentary by experts and noteworthy case studies.

When the Sudanese civil war reaches his village in 1985, eleven-year-old Salva becomes separated from his family and must walk with other Dinka tribe members through southern Sudan, Ethiopia, and Kenya in search of safe haven. Based on the life of Salva Dut, who, after emigrating to America in 1996, began a project to dig water wells in Sudan.