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Experiments show the production and properties of carbon dioxide and its use as a fire extinguisher. The second part demonstrates the effect of surface area, temperature, and concentration on chemical reaction rates.
(Source: DCMP)
Illustration showing the carbon cycle using animals and plants.
(Source: OpenStax)
Calvin cycle showing how carbon dioxide and other compounds are converted into glucose.
Over the past 200 years, more than two trillion metric tons of carbon dioxide have been poured into the atmosphere. This episode illustrates that carbon dioxide isn't just changing the climate on land. It's transforming the ocean in ways that haven't been seen for millions of years. Scientists around the world are in a race to understand these changes and what they will mean for thousands of species. Part of the "One Ocean" series.
Humanity's appetite for the earth's resources and consumer goods has led to increased levels of carbon dioxide entering the atmosphere, trapping more heat from the sun, and leading to the warming of the atmosphere. Argues that action could and should be taken at both international and political levels. Also addresses the question of what each individual can do to reduce his/her use of nonrenewable energy sources and lower each personal "carbon footprint" on the planet.
Many of our daily activities generate carbon dioxide and contribute to global warming and climatic changes. While carbon dioxide and other greenhouse gases are necessary for our survival, some research indicates that an increase in their levels may alter the climate. The increased presence of these gases can magnify the natural greenhouse effect of the atmosphere and damage the environment. However, there are steps individuals can take to decrease the impact of global warming and climate change. Chapter 1 of Air: Climate Change Series.
Chemistry is the science of interacting particles and the various states of matter. Developing a better understanding of the atomic model through experiments with gases, scientists discovered the Ideal Gas Law, developed phase diagrams, and learned about the properties of supercritical fluids. Today's chemists are exploring new ways to control the interactions of atoms, with the goal of making better hydrogen-powered cars and new technologies for the long-term, underground storage of carbon dioxide to reduce greenhouse warming. Part of the series Chemistry: Challenges And Solutions.
Ollie and Hanna receive a lesson on breathing. Suzi, with the help of a friend, explains why all living things must breath. Part of "My Little Planet" series.
Students learn how to differentiate mixtures, solutions, elements, and compounds. Additional concepts and terminology discussed include: element, pure substance, properties, atoms, molecule, compounds, types of mixtures, suspension, colloid, and alloy.
Can trees really combat climate change? For eons, nature has relied on photosynthesis as a means to keep carbon dioxide levels from getting out of control. This episode discusses ways trees can help solve climate change. Part of the “It’s Okay to Be Smart” series.
The importance of forests cannot be underestimated. Humans depend on forests for survival, from the air they breathe to the wood they use. Besides providing habitats for animals and livelihoods for humans, forests also offer watershed protection, prevent soil erosion, and mitigate climate change.
These days it seems everything is going green including roofs. With funding from the National Science Foundation, Patricia Culligan of Columbia University is studying green roofs, from their effects on storm water runoff and carbon dioxide absorption to claims they impact local climate and save energy.
In this segment, students learn all about different types of energy found on Earth. Solar energy comes from the sun, and geothermal energy is generated and stored in the earth. Students also discuss these forms of energy and how the energy of the earth transfers heat through the convection process. Part of the "Earth Science" series.
Explains why the body needs regular supplies of air and how these get to the body. The camera follows the process of breathing through the ultra-thin membrane of the lung into the blood, showing how the varying demand for oxygen is met by the exchange of information between the brain and the chest muscles and how the body rids itself of carbon dioxide.
Turn light source on to explore. Observe what happens in the observation window as you set up different combinations of light source and molecule. Note this simulation is the first to support our zoom and magnification feature, so zoom in for a closer look, if you need to.
(Source: PhET Interactive Simulations)
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.
Scientists have long chalked up ocean mixing of salt, heat, nutrients, and gases, such as oxygen and carbon dioxide, to wind and tides. New research is investigating another possible contributor: krill. Mixing ocean water may seem like a big job for such a tiny creature, but krill are a force of nature when they migrate in giant swarms to feed at night. Part of the "Science Nation" series.
Biodiversity, or biological diversity, refers to the variety of plants, animals, and microorganisms that exist. The biodiversity of an environment is important because it helps keep the environment in a natural balance. An ecosystem which is species-rich is more resilient and adaptable to external stress than one in which the range of species is limited. Part of the "Biology" series.
In this episode, researchers are exploring ways to make carbon nanotubes less expensive. The process would use carbon dioxide sucked out of the air. Researchers are also working to identify bacteria and viruses found in ocean spray. Also in this episode, scientists are attempting to design a battery that would charge electronic devices in seconds. Part of the "4 Awesome Discoveries You Probably Didn't Hear About This Week" series.
One might never know it, but the seemingly quiet Harvard Forest in Massachusetts is actually hard at work. Like other forests, it’s busy doing some serious global housekeeping, which is being monitored by scientists at Harvard University. With support from the National Science Foundation, researchers are studying forest ecology. That research includes determining how the forest responds to carbon dioxide in the atmosphere. Part of the National Science Foundation Series “Science Nation.”
Showing collections 1 to 4 of 4
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
Biology related concepts
A collection containing 59 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
