Seeing the Carbon Cycle

Journal Article | December 2005

The most important biochemical reactions for life in the ocean and on Earth are cellular respiration and photosynthesis. These two reactions play a central role in the carbon cycle. The ocean-based carbon cycle is…

Life Cycle of a Pencil

Journal Article | March 2000

Before you throw an object into the air, it is wise to remember that “What goes up must come down.” Similarly, before you throw an object away, you should recall that “mass cannot be created or destroyed during a…

The Cycles of Math and Science

Journal Article | March 2002

Cycles are found throughout nature. In this article, the water cycle is used as an example to help students understand the relationships, patterns, and phenomena that repeat in both math and science.

Connect the Spheres with the Coal Cycle

Journal Article | September 2010

Coal fueled the Industrial Revolution and, as a result, changed the course of human history. However, the geologic history of coal is much, much longer than that which is recorded by humans. In your classroom, the coal…

Round and Round the Water Cycle

Journal Article | January 2017

Observations and investigations lay the groundwork for primary students’ future Earth science experiences.

A Learning Cycle for All Students

Journal Article | February 2011

The National Science Education Standards are designed to provide a vision of scientific literacy for all students—regardless of age, race, ethnic background, English-language proficiency, socioeconomic status,…

Editor’s Roundtable: Cycles and connections

Journal Article | September 2010

Most middle level students are too young to recognize on their own the complex relationships among the natural cycles. They seldom connect one cycle with another nor do they see the relevance of the cycles to human…