"Explains the patterns and cycles created on Earth by the influence of the Sun and the Moon, as well as by the Earth's magnetic poles and the planet's rotation on an axis"--Provided by publisher.
" ... explains how the Earth's supply of nitrogen moves in different forms in a cycle from the air to the soil to living things; ... explain[s] such processes as fixation, nitrification, and dentrification, as well as the important role of bacteria in the nitrogen cycle; feature boxes [that] highlight examples of the ways in which human activity ... releases harmful greenhouse gases into the air interfering with the nitrogen cycle; and encourage[s] [readers] to find ways to take action and find solutions"--Provided by publisher.
Explains that the natural element carbon is found in all living things, including people, and how the Earth's supply of carbon moves among Earth's oceans, atmosphere, ecosystem, and geosphere in a process called the carbon cycle.
