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Keywords: Biomass
(Complete Item Description)
- Abstract: Highlights of this course include: Major biological, chemical and physical components of the agricultural systems The scientific basis for understanding these systems and their management How has science influenced policies related to agriculture, food safety and environment in the United States? How have the policies evolved over time in the US? What has worked and what has not; what are the reasons and what are the consequences? Beyond science, what other factors influence policies? How do we link what we learn to ecological agriculture? How do we use what we learn for policy analysis?
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- Abstract: Aerosol index over South America from August 1, 1987 through September 30, 1987 as measured by the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS)
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- Abstract: Aerosol index over Africa from July 2, 1986 through September 7, 1986 as measured by the Nimbus-7 Total Ozone Mapping Spectrometer (TOMS)
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- Abstract: Biomass burning is the burning of living and dead vegetation. It includes the human-initiated burning of vegetation for land clearing and land-use change as well as natural, lightning-induced fires. Scientists estimate that humans are responsible for about 90% of biomass burning with only a small percentage of natural fires contributing to the total amount of vegetation burned. Burning vegetation releases large amounts of particulates (solid carbon combustion particles) and gases, including greenhouse gases that help warm the Earth. Studies suggest that biomass burning has increased on a global scale over the last 100 years, and computer calculations indicate that a hotter Earth resulting from global warming will lead to more frequent and larger fires. Biomass burning particulates impact climate and can also affect human health when they are inhaled, causing respiratory problems. Here are three images of South America on October 7, 2004. The first image is shows clouds and fires on that day. The second image is clouds and Nitrous Dioxide (NO2) concentrations in the stratosphere. The last image overlays the fires on the NO2 data.
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- Abstract: Students are introduced to the concept of energy cycles by learning about the carbon cycle. They will learn how carbon atoms travel through the geological (ancient) carbon cycle and the biological/physical carbon cycle. Students will consider how human activities have disturbed the carbon cycle by emitting carbon dioxide into the atmosphere. They will discuss how engineers and scientists are working to reduce carbon dioxide emissions. Lastly, students will consider how they can help the world through simple energy conservation measures.
- Subject:
Science and Technology
- Grade Level:
Primary, Secondary
- Collection:
TeachEngineering
(Complete Item Description)
- Abstract: General Biology - Fall 2007. This is a general introduction to plant development, form, and function; population genetics, ecology, and evolution. Intended for students majoring in the biological sciences, but open to all qualified students.
In general at the end of Biology 1B students will be able to: describe the scientific method and explain how it would be applied to a novel problem; explain the consequences of random variation when extrapolated over time; distinguish between positive and negative feedback processes and identify such processes in novel situations.
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- Abstract: Students form expert engineering teams working for the (fictional) alternative energy consulting firm, Greenewables, Inc. Each team specializes in a form of renewable energy used to generate electrical power: passive solar, solar photovoltaic, wind power, low-impact hydropower, biomass, geothermal and (for more advanced students) hydrogen fuel cells. Teams produce poster presentations making a case for their technology and produce an accompanying PDF document using Adobe Acrobat that summarizes the presentation. This activity is geared towards fifth-grade and older students, and Internet research capabilities are required. Some portions of this activity may be appropriate with younger students.
- Subject:
Science and Technology
- Grade Level:
Primary, Secondary
- Collection:
TeachEngineering
(Complete Item Description)
- Abstract: This item presents information about alternative sources of energy, using industrial control techniques, and the role of tress and oceans in keeping the air clean. Includes great graphics.
(Complete Item Description)
- Abstract: This site uses satellite imagery and text to show how wind-driven upwelling in ocean waters off the coasts of Peru and Northwest Africa provides nutrients that support some of the world's richest fisheries.
- Subject:
Science and Technology
- Grade Level:
Secondary, Post-secondary
- Collection:
NASA
(Complete Item Description)
- Abstract: Students learn and discuss the advantages and disadvantages of renewable and non-renewable energy sources. They also learn about our nation's electric power grid and what it means for a residential home to be "off the grid."
- Subject:
Science and Technology
- Grade Level:
Secondary
- Collection:
TeachEngineering
(Complete Item Description)
- Abstract: Many potential, renewable sources of biomass energy exist in Pennsylvania, especially on farms. This video profiles various facilities that make biomass energy, including biodiesel fuel. Biomass energy is important to the economy and the food supply.
- Subject:
Science and Technology
- Grade Level:
Primary, Secondary
- Collection:
Teachers' Domain
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