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Surveys soil's formation, composition, properties, types, and movement. Also identifies the five major plant communities: tundra, forests, scrublands, grasslands, and deserts. The connection between soils and vegetation affects where people live.
(Source: DCMP)
Argentina is experiencing a decrease in native forests due to deforestation. As part of the process, only fifteen trees are replaced for every hundred cut down. This depletion of natural vegetation has devastating consequences for the environment. These consequences are immediate and long-term, if not reversed. Deforestation affects climate, biodiversity, conservation, and water absorption. Chapter 5 of Air: Climate Change Series.
What exactly is a plant? Students investigate the characteristics of plants. They also learn about different types of plants.
Flowers are everywhere. Students define what a flower is and the parts that make up a flower. They also learn the importance of flowering plants in daily life.
Students explore the life cycle of plants. This video discusses the process of plant development from a small seed to a mature plant.
Students will explore the basic parts of a plant, including the stem, roots, and leaves. This video describes the functions of each of these plant parts using various illustrations. Important terminology includes taproot, fibrous root, stem, sap, nutrients, and leaf.
Explore how the nature of highly seasonal rainfall cycles and periodic fires create conditions that have shaped Mediterranean-climate ecosystems. Part of the "Mediterranean-Climate Ecosystems" series.
Looks at different kinds of plants and explains how they need light, air, and water to survive. Identifies the different parts of a plant, including leaves, stems, roots, and seeds. Describes how plants are useful to people.
In this episode, experts reveal Europe's geological history. They discuss the discovery of ancient fossils and petrified forests. Part of the "Voyage of the Continents" series.
Explore the vastly different ecosystems of the rainforest and the jungle. This video discusses the diversity of their vegetation, animals, and insects. From the Kool Books series narrated by Hector Bonilla.
Part of the "Branches on the Tree of Life" series. Uses crisp graphic animation to describe the molecular-level mechanisms of photosynthesis. Examples of this critical element of plant biology include the major plant groups of mosses, liverworts, ferns, horsetails, and the seed plants (gymnosperms and flowering plants).
California’s Pinnacles National Monument is America’s newest National Park. The monument gets its name from its spires and rock formations. It is also home to the California condor, rare chaparral vegetation and carpets of wildflowers.
Earth's landscapes vary because there are different climatic zones that have unique, distinguishing conditions. One of these, the tropic zone, is divided into four more specific zones. The rainy tropics, wet-dry tropics, tropical and subtropical deserts, and tropical highlands are similar, yet different. Includes information on vegetation, animal life, human settlement, urban centers, and climatic conditions.
The mid-latitude and polar regions are two of earth's three climatic zones. The mid-latitude, or temperate, regions have definite seasonal changes in temperature and length of days and nights. Polar climates have extremely cold temperatures. Covers the climatic characteristics of the five subregions of the temperate and polar zones, noting also the vegetation, animal and human life, urban centers, and food crops.
Students explore the characteristics of nonvascular land plants as well as some of the simpler vascular plants. An in-depth look at mosses, hornworts, and liverworts serves as the topic of study for the beginning of the program. The characteristics of more advanced vascular plants are then explored such as whisk ferns, horsetails, and ferns. Concepts and terminology include: Bryophyta, Hepaticophyta, Anthocerophyta, rhizoids, gametophyte, sporophyte, Lycophyta, Pterophyta, spores, and sori.
Scientific evidence may show that human activity, particularly over the past 100 years, has led to a buildup of what are known as "greenhouse gases," the most common of which is carbon dioxide, in the atmosphere. Energy use, particularly the burning of fossil fuels and the large-scale removal of vegetation from the earth's surface, are thought to be largely responsible for greenhouse gas buildup.
Mining traditionally has destroyed vegetation and topsoil as it takes minerals from the ground. New techniques and increased environmental awareness has recently led to new land reclamation experiments. Adding earthworms and bacteria to restore the land is one such venture. Highlights bioremediation--using living organisms-- to clean up heavy metals left as mining residue.
Powerful forces have forged the conditions on Earth that have made life possible. The millennia have been witnesses to the formation of the planet: its singular position in relation to the sun, the evolution of the continents, and the birth of entire mountain chains. All of these elements combine to create Earth’s constantly changing climate. Homo sapiens emerge into this unpredictable and violent world, fighting for survival from the start. It is these early humans’ ability to adapt that allows them to triumph even in the face of incredible adversity and sets the path for modern man. Part of the "How Climate Made History" series.
