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This textbook chapter describes the role photosynthesis, food webs, and fossil fuels in the movement of energy through the biosphere. The resource includes a student investigation, links to current news articles, and an essay-based unit assessment.... (View More)

Keywords: Energy pyramid
Audience: High school
Materials Cost: Free per student

This textbook chapter makes the case for preserving desert old growth forests, and endangered species. The captive breeding program for the black-footed ferret is presented as a case study. Students learn about conservation practices they can do,... (View More)

In this textbook chapter, scientists studying the concentration of becomes CO² in the atmosphere are profiled. The techniques for measuring and recording carbon dioxide concentrations at the Mauna Loa Observatory are described. A link to a video... (View More)

Audience: High school
Materials Cost: Free

In this textbook chapter, students examine the data from Mauna Loa to see that the concentration of carbon dioxide in the atmosphere is increasing. The seasonal signal observed in the data is explained by the growth cycle of plants in the Northern... (View More)

Audience: High school
Materials Cost: Free

This textbook chapter introduces the buffalo as a keystone species, and describes the environmental impacts of its near extinction, including today’s predominance of non-native species in the Great Plains. Human activities that contribute to... (View More)

In this textbook chapter, students are introduced to Mendelian inheritance and the biological processes through which changes in DNA are created and propagated within a population. An activity teaches students about dominant and recessive alleles,... (View More)

Audience: High school
Materials Cost: Free

This textbook chapter presents ocean and wetland ecosystems, and describes how floating plastic trash endangers aquatic species. Oceanographer Jacques Cousteau is profiled. The resource includes a student action plan to reduce waste in their... (View More)

Audience: High school
Materials Cost: Free

This introductory textbook chapter presents data demonstrating decreased global biodiversity and its link to human activity. The resource includes a field-based student investigation of local biodiversity, links to current news articles, and an... (View More)

This textbook chapter describes the processes through which El Niño and La Niña conditions emerge. The resource includes an animation of ocean currents, and links to current news articles, and a suite of pre- and post-unit assessments. A teacher's... (View More)

This textbook chapter describes the properties of greenhouse gases that are being added to the atmosphere: carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and ozone. Deforestation, industrialization and population growth are presented... (View More)

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