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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.
(Source: DCMP)
Can "dirty" birds help scientists assess air pollution? Yes, and scientists have been using a species of birds to answer questions about levels of air pollution in the United States for over 135 years. Part of "The Brain Scoop" series.
What if scientists could grow elevators to space? Or make phones that last for weeks without a charge? These things could be possible someday with an amazing material like carbon nanotubes. A MIT scientist discusses the curious way researchers create this super-material. Part of the "Science Out Loud" series.
Part of the "Chemistry in Action" series. Demonstrates how chemical compounds are placed into groups so that they may be studied easier. Explores acids and bases, emphasizing their nature and common everyday uses. Discusses carbon compounds, and introduces the following terminology: acid, base, pH, salt, carbon, organic, and hydrocarbon.
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)
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.
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.
Discusses some of the biggest problems facing the environment today and how it is being abused. Provides an overview of the role of the greenhouse effect, carbon emissions, air pollution, and how the burning of the rainforest affects global warming. Explains the "carbon footprint" and outlines an experiment with acid rain. Shows how much water and unnecessary packaging material people use every day. Details how people can "refuse, reuse, and recycle," contributing to a healthier Earth.
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.
Lab experiments test for oxygen and show its reaction to iron and carbon.
Earth has many systems and cycles that help regulate the processes needed to sustain life. These systems are susceptible to human impact. Part of the "Earth Science" series.
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.
Lab experiments demonstrate a variety of ways to detect carbon and hydrogen in organic substances. Burns hexane, benzene, cyclohexane, and naphthalene; shows properties of a propane-butane mixture.
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.
Graphene could make it possible for electricity to move effortlessly through computer chips, thereby allowing computer systems to run faster than ever before. Savings in both heat and energy costs could have graphene replacing silicon as the basis of computer chip construction. Part of the Fast Draw Series.
Fire is an ever-present danger in the world of NASCAR. Drivers are protected by fire-resistant Nomex fabric. These firesuits help keep the drivers safe by decreasing the rate of heat transfer. Part of "The Science of Speed" series.
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.
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
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
