This resource provides an explanation of two number/magic puzzles that can be …
This resource provides an explanation of two number/magic puzzles that can be demystified and explained by using algebra. This resource is from PUMAS - Practical Uses of Math and Science - a collection of brief examples created by scientists and engineers showing how math and science topics taught in K-12 classes have real world applications.
Alkanes are kind of the wallflowers of organic chemistry, but they still …
Alkanes are kind of the wallflowers of organic chemistry, but they still have important functions in the world around us. In this episode of Crash Course Organic Chemistry we’re building our knowledge of organic molecules by learning all about these so called couch potatoes from how they are separated from crude oil to how to use Newman projections to predict torsional strain and steric hinderance. We’ll also learn the names of some common conformers and get an introduction to cycloalkanes.
The properties of organic molecules depend on the structure, and knowing the …
The properties of organic molecules depend on the structure, and knowing the names of organic compounds allow us to communicate with other chemists. We'll be learning about different aspects of molecular structure, including common functional groups and conformations.
Like a trendy dance, a fighting combo, or a secret handshake, organic …
Like a trendy dance, a fighting combo, or a secret handshake, organic reactions can be broken down into simpler steps. In this episode of Crash Course Organic Chemistry, we’ll specifically be looking at alkene addition reactions, and with each new reaction ask ourselves three questions to help us puzzle through the mechanism and understand what’s going on.
Oxidation-reduction reactions are going on around us, and inside us, all the …
Oxidation-reduction reactions are going on around us, and inside us, all the time, and we can make redox reactions in organic chemistry easier to understand by tracking carbon-oxygen bonds. In this episode of Crash Course Organic Chemistry, we’ll focus on alkene redox reactions and revisit our 3-part secret handshake to help us better understand patterns and predict the products of these reactions.
Today Hank talks about the deliciousness of alkenes & alkynes, their structures, …
Today Hank talks about the deliciousness of alkenes & alkynes, their structures, and how to remember which is which by simply knowing the alphabet. Also, he breaks down hydrogenation, halogenation, polymerization, and triglycerides all while helping us figure out the meaning of different names for fats.
Carbon-carbon double bonds are pretty common in nature, but triple bonds between …
Carbon-carbon double bonds are pretty common in nature, but triple bonds between carbons, called alkynes, are not. When alkynes do pop up in nature, it’s usually in a compound that’s toxic to humans, however, we can synthesize alkynes that are life saving medicines and materials. In this episode of Crash Course Organic Chemistry, we’ll learn about alkynes and some of the reactions we can use them in (hint: it’s a lot of the same reactions we used for alkenes!)
This animation depicts the carbon cycle in a fashion that is suited …
This animation depicts the carbon cycle in a fashion that is suited for younger audiences. The video discusses how carbon enters and exits the environment through both natural and human-driven ways.
In this informational text, elementary school readers learn about the difference between …
In this informational text, elementary school readers learn about the difference between weather and climate and about components of the climate system. The text can be used to practice visualizing and other comprehension strategies. Available in K-2 and 3-5 grade bands and as an illustrated book as well as a text document, the story appears in the online magazine Beyond Weather and the Water Cycle.
Students learn about the differences between types of water (surface and ground), …
Students learn about the differences between types of water (surface and ground), as well as the differences between streams, rivers and lakes. Then, they learn about dissolved organic matter (DOM), and the role it plays in identifying drinking water sources. Finally, students are introduced to conventional drinking water treatment processes.
This book began as lecture notes for an Oregon State University course …
This book began as lecture notes for an Oregon State University course in fluid mechanics, designed for beginning graduate students in physical oceanography. Because of its fundamental nature, this course is often taken by students outside physical oceanography, e.g., atmospheric science, civil engineering, physics and mathematics. In later courses, the student will discover esoteric fluid phenomena such as internal waves that propagate through the sky, water phase changes that govern clouds, and planetary rotation effects that control large-scale winds and ocean currents. In contrast, this course concerns phenomena that we have all been familiar with since childhood: flows you see in sinks and bathtubs, in rivers, and at the beach. In this context, we develop the mathematical techniques and scientific reasoning skills needed for higher-level courses and professional research. Prerequisites are few: basic linear algebra, differential and integral calculus and Newton’s laws of motion. As we go along we discover the need for the more advanced tools of tensor analysis.
In this inquiry activity students work in groups to investigate allelopathy via …
In this inquiry activity students work in groups to investigate allelopathy via research, using the scientific method to plan and carry out an experiment, and creating a formal written report and oral presentation.
These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping …
These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.
Students define and classify alloys as mixtures, while comparing and contrasting the …
Students define and classify alloys as mixtures, while comparing and contrasting the properties of alloys to those of pure substances. Students learn that engineers investigate the structures and properties of alloys for biomedical and transportation applications. Pre- and post-assessment handouts are provided.
Acting as engineering teams, students take measurements and make calculations to determine …
Acting as engineering teams, students take measurements and make calculations to determine the specific strength of various alloys and then report their data to the rest of the class. Using this class data, students write data-based recommendations to NASA regarding the best alloy to use in the construction of the engine and engine turbines for the Space Launch System that will eventually be used to transport astronauts to Mars.
Se examina estrategias para optimizar la alimentación de rumiantes mediante el cultivo …
Se examina estrategias para optimizar la alimentación de rumiantes mediante el cultivo y manejo de diferentes forrajes en Santo Domingo de los Tsáchilas, Ecuador. En el primer capítulo, se destaca cómo el encalado y la fertilización mejoran el rendimiento del maíz, enfatizando en dosis óptimas de nutrientes. El segundo capítulo aborda la fertilización orgánica del pasto Mombasa bajo sombra de naranja, resaltando la superioridad de la pollinaza en el incremento de rendimiento y calidad del forraje. Los capítulos siguientes se centran en la edad óptima de corte para maximizar la biomasa del pasto Cuba OM-22, el manejo del King Grass como alternativa forrajera para el sector ganadero, y el desarrollo del forraje verde hidropónico de sorgo y maíz a dos densidades de siembra, demostrando que técnicas específicas de manejo y cultivo pueden significativamente influir en la productividad y sostenibilidad de la alimentación rumiante. A través de estos estudios, el libro propone soluciones prácticas y sustentables para mejorar la nutrición de rumiantes en entornos tropicales.
Road deicers raise several environmental and cost concerns. In this activity students …
Road deicers raise several environmental and cost concerns. In this activity students consider alternatives while investigating colligative properties.
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