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Host Emily Graslie interviews Dr. Bruce Patterson and Yale postdoctoral researcher Nate Upham to discuss their research on naked mole-rats. Their findings have revealed that naked mole-rats should be their own scientific family. Part of "The Brain Scoop" series.
(Source: DCMP)
Investigates the physical features of a number of "ugly" animals to demonstrate the efficiency of their odd appendages or disproportionate body parts. Studies the nose of the star-nosed mole, the fleshy protuberances in the mouth of the snapping turtle, the warthog's warts and tusks, the vulture's head, the northern elephant seal's proboscis, the proboscis monkey's nose and protruding stomach, the naked mole rat's lack of hair or fur, the whip scorpion's alien appearance, the mouths of deep sea denizens, and the bat's head.
Using a balanced chemical equation to calculate amounts of reactants and products is called stoichiometry. It is a super technical-sounding word that simply means using ratios from the balanced equation. Topics covered in this program include the metric system, balancing equations, molar conversions, mass percent, empirical formulas, and limiting reactants. Part of the "Chemistry" series.
Presents three key concepts about chemical reactions and energy changes: exothermic and endothermic reactions, reaction rates involving temperature and concentration, and catalysts. Each concept is illustrated with a variety of experiments and computer animation to illuminate what is happening both visibly and at the molecular level.
In each episode, viewers are given clues about a hidden animal inside a magic box. Can viewers use all the clues to correctly guess this animal that likes to live underground? Part of the "Zoobabu" series.
Figure 2.9 (OpenStax, Biology 2e) caption: Two or more atoms may bond with each other to form a molecule. When two hydrogens and an oxygen share electrons via covalent bonds it forms a water molecule.
(Source: OpenStax)
Figure 2.23 (OpenStax, Biology 2e) caption: Carbon can form five- and six-membered rings. Single or double bonds may connect the carbons in the ring, and nitrogen may be substituted for carbon.
Covers the concept of ratios and proportions, the correct way to express and write ratios and proportions, ratios and proportions in their simplest form, and comparing ratios and proportions. Provides real-life situations in which ratios and proportions would be applied, such as mixing paint, reading and interpreting map scales, and calculating map distances.
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)
Part of the "Visualizing Cell Processes" series. Includes the following modules: "The Cell Machinery," "A Variety of Cells," "Organic Molecules: The Building Blocks of Life," "Prokaryote Evolution and Diversity," and "Independently Living Eukaryotic Cells."
Molecules form when individual atoms create bonds by sharing electrons. Understanding how atoms combine to make molecules allows scientists to predict many of the physical and chemical properties of substances. Since the outermost eight electrons are key to forming compounds, this unit shows how the Octet Rule provides a basis for predicting how atoms may gain, lose, or share electrons to fill the slots in their outer shells. A fundamental understanding of how electrons form bonds leads to the three-dimensional shapes of molecules and has implications in all aspects of chemistry. Part of the series Chemistry: Challenges And Solutions.
The rate of a chemical reaction is affected by a number of factors, including temperature and the concentration of reactants at the beginning of the reaction. While the chemical equation may show reactants turning into products as a straightforward process, it is actually involved and precise. How exactly do reactants turn into products? Sometimes, the answer is as simple as two atoms bumping into each other and forming a bond. Most of the time, however, the process is much more complex. Controlling the rate of reactions has implications for a variety of applications, including drug design and corrosion prevention. Part of the series Chemistry: Challenges And Solutions.
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.
To manipulate chemical reactions on a large scale, scientists use stoichiometry to quantify those reactions. The use of stoichiometry ensures there are the right amount of reactants and products. Without it, reactions can be incomplete, with expensive materials wasted and harmful byproducts created. Using stoichiometry, scientists are creating chemicals that take the place of petroleum in fabricating sustainable materials. At a different lab, scientists are mimicking the process of photosynthesis to convert the sun’s energy into storable chemical energy. Part of Chemistry: Challenges and Solutions Series.
With support from the National Science Foundation, chemist Kent Kirshenbaum and his team at New York University are engineering molecules to mimic the shapes, structures, and functions of natural proteins. The ultimate goal of this biomimetic chemistry research is to develop a reliable way to build synthetic proteins that can be put to work at the industrial scale. Part of the "Science Nation" series.
Students will explore how molecular movement is related to temperature, and how temperature can be measured. Important terminology includes thermometer, thermal energy, kinetic energy, potential energy, energy conversion, molecules, and heat.
Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.
Showing collections 1 to 5 of 5
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
Resources related to vision
A collection containing 12 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
